Pressure Chart

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-449A XP40 Basic Info & PT Chart

R-449A is a non-azeotropic blend comprised of R-134a (25.7%), R-1234yf (25.3%), R-125 (24.7%), and R-32 (24.3%). This refrigerant falls into the new classification of refrigerants known as Hydrofluoroolefin family. You may also see R-449A labeled as XP40 or under the brand name Opteon which comes from the Chemours company. It has an A1 rating from Ashrae which means that it is one of safest refrigerants out there. (As safe as your standard HFC refrigerants like R-134a or R-404A.) This is a big point of note as most HFO refrigerants are either flammable or slightly flammable, but 449A is not.

This XP40 refrigerant was designed as a replacement for the commonly used HFC R-404A. The problem with R-404A is its immense Global Warming Potential of nearly four-thousand. R-449A is able to cut this number down to 1,397 which is almost a seventy percent reduction. It is also between eight to twelve percent more efficient then your standard R-404A systems.

Just like R-404A, R-449A’s primary applications range from industrial refrigeration and air conditioning over to commercial refrigeration found in your typical grocery store or gas station. It can even be used in ice rinks if needed. It can be used in new equipment and can also replace R-22, R-404A, R-507, and R-407A in existing equipment as long as the proper retrofitting is done. The good news is that the retrofitting procedure is quite simplistic compared to other alternative refrigerants. For a full retrofit guide click this link to be taken to the official Chemours official document.

Lastly, is your pressure temperature chart. As always if you see anything that looks incorrect please reach out to me and I will get it updated as soon as I can.

Temp (F)Temp (C)Liquid Pressure (PSIG)Vapor Pressure (PSIG)
-94-70-11.18-12.34
-90.4-68-10.71-12
-86.8-66-10.19-11.62
-83.2-64-9.62-11.19
-79.6-62-8.99-10.73
-76-60-8.3-10.21
-72.4-58-7.54-9.63
-68.8-56-6.71-9
-65.2-54-5.8-8.31
-61.6-52-4.81-7.55
-58-50-3.74-6.72
-54.4-48-2.58-5.81
-50.8-46-1.32-4.82
-47.2-440.04-3.75
-43.6-421.5-2.58
-40-403.08-1.32
-36.4-384.780.04
-32.8-366.61.52
-29.2-348.563.1
-25.6-3210.654.81
-22-3012.886.64
-18.4-2815.278.61
-14.8-2617.8110.71
-11.2-2420.5112.96
-7.6-2223.3915.37
-4-2026.4417.93
-0.4-1829.6820.66
3.2-1633.123.56
6.8-1436.7326.65
10.4-1240.5629.92
14-1044.6133.39
17.6-848.8837.06
21.2-653.3740.95
24.8-458.145.05
28.4-263.0849.38
32068.3153.95
35.6273.7958.77
39.2479.5563.83
42.8685.5869.16
46.4891.974.76
501098.5180.65
53.612105.4286.82
57.214112.6493.29
60.816120.17100.07
64.418128.04107.17
6820136.24114.59
71.622144.78122.36
75.224153.67130.47
78.826162.92138.95
82.428172.55147.8
8630182.56157.02
89.632192.95166.65
93.234203.75176.67
96.836214.95187.12
100.438226.56198
10440238.61209.31
107.642251.08221.1
111.244264.02233.33
114.846277.39246.07
118.448291.23259.3
12250305.56273.05
125.652320.36287.33
129.254335.68302.17
132.856351.48317.58
136.458367.81333.57
14060384.67350.19
143.662402.07367.43
147.264420.02385.34
150.866438.52403.96
154.468457.61423.28
15870477.27443.4

Thanks for reading,

Alec Johnson

RefrigerantHQ

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-407F Refrigerant Pressure Temperature Chart

As most of you know the phase out of R-22 began on January 1st, 2010. This initial phase out stated that no new R-22 machines could be imported or manufactured within the United States after this date. This was due to R-22 being directly responsible for Ozone Depletion. It is not just Ozone we have to worry about though folks. Some of these HFC refrigerants that we have been using for the past twenty years or so have a different problem called Global Warming Potential, or GWP. GWP is a measurement of how impactful a refrigerant is to Global Warming. The higher the number the more impact it will have.

One of the most notorious refrigerants in this category is known as R-404A. 404A is an HFC blend and has a GWP number of nearly four-thousand! 404A is used in low and medium temperature commercial refrigeration applications found in supermarkets, gas stations, and even vending machines. In recent years there has been a lot of pressure on companies and governments to use alternative refrigerants to R-404A in an effort to reduce their impact on the Climate.

One of these alternative refrigerants is known as R-407F also known under the name Genertron Performax LT. This product, from the Honeywell Corporation, is an HFC blend made up of R-134a, R-125, and R-32. While it does not have a perfect number when it comes to the Global Warming Potential scale it is significantly reduced when compared to R-404A. While 404A’s GWP is nearly four-thousand the R-407F comes in at only eighteen-hundred. That is a big drop! There is also no risk of Ozone Depletion.

407F was meant as a replacement for R-22 and R-404A in these supermarket/gas station applications. It is rated with an A1 grade from ASHRAE which means it is non-toxic and non-flammable. It may not be the perfect solution to those who are looking to reduce their climate footprint but you are able to retrofit exiting R-22 and R-404A units using this new refrigerant. That will save a significant amount of money versus having to purchase an entirely new system.

Regardless of what your thoughts on R-407F you will need to know the pressures and temperatures in order to properly maintenance it. Check out our chart below and if you see anything incorrect please reach out to us!

Temp (F)Temp (C)Liquid Pressure (PSIG)Vapor Pressure (PSIG)
-94-70-10.81-12.23
-90.4-68-10.29-11.86
-86.8-66-9.72-11.46
-83.2-64-9.09-11
-79.6-62-8.39-10.5
-76-60-7.63-9.94
-72.4-58-6.79-9.32
-68.8-56-5.88-8.63
-65.2-54-4.88-7.88
-61.6-52-3.8-7.05
-58-50-2.62-6.15
-54.4-48-1.34-5.16
-50.8-460.05-4.08
-47.2-441.54-2.9
-43.6-423.15-1.63
-40-404.89-0.24
-36.4-386.761.26
-32.8-368.762.88
-29.2-3410.914.62
-25.6-3213.26.5
-22-3015.668.52
-18.4-2818.2810.7
-14.8-2621.0713.02
-11.2-2424.0415.51
-7.6-2227.1918.17
-4-2030.5521
-0.4-1834.124.03
3.2-1637.8627.25
6.8-1441.8530.67
10.4-1246.0534.3
14-1050.538.16
17.6-855.1842.24
21.2-660.1246.56
24.8-465.3251.12
28.4-270.7855.95
32076.5361.03
35.6282.5566.4
39.2488.8872.04
42.8695.577.99
46.48102.4584.23
5010109.7190.79
53.612117.397.68
57.214125.24104.9
60.816133.53112.47
64.418142.17120.4
6820151.19128.7
71.622160.59137.37
75.224170.38146.44
78.826180.55155.92
82.428191.15165.81
8630202.16176.12
89.632213.61186.88
93.234225.5198.1
96.836237.84209.77
100.438250.65221.94
10440263.91234.61
107.642277.68247.79
111.244291.93261.49
114.846306.7275.73
118.448321.99290.55
12250337.81305.94
125.652354.16321.93
129.254371.08338.55
132.856388.59355.79
136.458406.65373.71
14060425.33392.33
143.662444.6411.66
147.264464.51431.74
150.866485.05452.6
154.468506.24474.31
15870528.09496.9

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-1234ze Refrigerant Pressure Temperature Chart

The refrigerant R-1234ze is part of a new generation of refrigerants under the HFO classification. HFO’s, or hydrofluoroolefins, are a new classification of refrigerants that aim to take the place of the commonly used HFCs. These HFC refrigerants have a VERY high Global Warming Potential, or GWP. The higher the GWP the more damage the refrigerant can do to Global Warming. Remember folks that refrigerants are Greenhouse Gases and can be many times more potent then the standard Carbon Dioxide. Having these very high GWP refrigerants was causing a significant impact on Climate Change.

R-1234ze was introduced as an alternative to the R-134a HFC refrigerant. R-134 has a GWP number of over fourteen-hundred. That means it is fourteen-hundred times worse then Carbon Dioxide when released into the atmosphere. To combat this the Honeywell corporation released R-1234ze under their Solstice Refrigerants brand name. This refrigerant has no Ozone Depletion Potential and has a GWP number of only seven.When comparing that to the fourteen-hundred we saw earlier you can really see the difference.

R-1234ze can be used in a variety of applications including supermarkets, water cooled chillers, commercial buildings, vending machines, refrigerators, heat pumps, and it can even be found in cascade systems. While it was meant to replace R-134a it can also be used in place of other refrigerants such as R-744 (Carbon Dioxide) and R-600a (Isobutane).  The only major downside of this refrigerant is that it is rated as an A2L from ASHRAE. The A stands for non-toxic but that 2l rating signifies that this HFO refrigerant is slightly flammable. R-134a on the other hand had no chance of flame propagation. So, please be cognizant of the flammability risk when working with ze refrigerant.

If you are working with R-1234ze then it serves you to know the temperatures and pressures. Please check out pressure chart below. If you see any errors please feel free to let me know.

Temp (F)Temp (C)Pressure (PSIG)Pressure (kPA)
-58-50-11.75-81
-54.4-48-11.31-78
-50.8-46-10.88-75
-47.2-44-10.44-72
-43.6-42-9.86-68
-40-40-9.43-65
-36.4-38-8.85-61
-32.8-36-8.12-56
-29.2-34-7.4-51
-25.6-32-6.67-46
-22-30-5.8-40
-18.4-28-4.93-34
-14.8-26-4.06-28
-11.2-24-3.05-21
-7.6-22-1.74-12
-4-20-0.73-5
-0.4-180.584
3.2-162.0314
6.8-143.4824
10.4-124.9334
14-106.6746
17.6-88.4158
21.2-610.371
24.8-412.3385
28.4-214.5100
32016.68115
35.6219.15132
39.2421.61149
42.8624.22167
46.4827.12187
501030.02207
53.61233.07228
57.21436.4251
60.81639.89275
64.41843.51300
682047.28326
71.62251.2353
75.22455.4382
78.82659.76412
82.42864.4444
863069.18477
89.63274.11511
93.23479.34547
96.83684.85585
100.43890.5624
1044096.45665
107.642102.69708
111.244109.07752
114.846115.74798
118.448122.56845
12250129.95896
125.652137.35947
129.254145.181001
132.856153.311057
136.458161.721115
14060170.421175

 

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-123 Refrigerant Pressure Temperature Chart

R-123 refrigerant is most likely a rare find nowadays. It was originally introduced in the 1990’s as a replacement for the now phased out refrigerant known as R-11. You see R-11 contained chlorine. It was found that refrigerants that contain chlorine can actively damage the Ozone layer if they are released into the atmosphere. Once this was found out the world banded together and formed an international treaty known as the Montreal Protocol. This protocol banned CFC and HCFC refrigerants.

When R-11 was banned R-123 began to see more and more use in larger low pressure centrifugal chillers. It was hugely efficient and it had a much lower Ozone Depletion Potential then its predecessor. There were a lot of downsides to R-123 though. One of the biggest was that it was rated as a B1 on ASHRAE’s safety scale. That means that the refrigerant was toxic if breathed in or if you were exposed to it. This alone takes a lot of points away from its appeal but couple that with it being an HCFC refrigerant with an Ozone Depletion Potential as well then you have a perfect storm for another phase out.

R-123 was meant as a substitute or a standby when R-11 was phased out. It wasn’t meant as a permanent solution. That is why you now see more R-134a applications when it comes to centrifugal chillers. Not even R-134a is safe though folks as they are already trying to phase this out as well due to it’s high Global Warming Potential. The refrigerant market is always changing…

If you do in the off chance run into an R-123 system then you are going to need to know the pressures. Let’s take a look at our pressure chart below:

Temp (F)Temp (C)Pressure (PSIG)Pressure Liquid (PSIA)
-20-28.8827.81
-15-26.1127.41.2
-10-23.3326.91.4
-5-20.5526.41.7
0-17.7725.92
5-1525.22.3
10-12.2224.52.6
15-9.4423.83
20-6.6622.83.5
25-3.8821.84
30-1.1120.74.5
351.6619.55.1
404.4418.15.8
457.2216.66.5
501014.97.3
5512.77138.2
6015.5511.29.2
6518.338.910.3
7021.116.511.4
7523.884.112.7
8026.661.214.1
8529.440.915.6
9032.222.517.2
95354.318.9
10037.776.120.8
10540.558.122.8
11043.3310.325
11546.1112.627.3
12048.8815.129.8
12551.6617.832.4
13054.4420.635.3
13557.2223.638.3
1406026.841.5
14562.7730.244.9
15065.5533.948.5
15568.3352.3
16071.1156.4
16573.8860.7
17076.6665.2
17579.4470
18082.2275
1858580.3
19087.7785.9
19590.5591.7
20093.3397.9

 

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-23 Refrigerant Pressure Chart

R-23 refrigerant is not commonly used. When you do run into it it is typically used in a cascade setup in a low temperature refrigeration system. It was originally developed as an alternative to the R-13 refrigerant. R-13 was a CFC refrigerant and was banned across the world in the early 1990’s due to it’s damaging of the Ozone layer. This was all done through the treaty known as the Montreal Protocol.

When R-13 was banned the HFC refrigerant R-23 took it’s place. It solved the problem with the Ozone but now there was a new problem with R-23. This new problem is known as Global Warming Potential (GWP). The higher the GWP number the more impact the refrigerant has on the environment.

Carbon Dioxide (R-744) is used as the zero measure for this scale. Any number above zero is that much more potent then Carbon Dioxide. In the case of R-23 its GWP number is over fourteen-thousand. Yes folks, you read that right. R-23 is fourteen-thousand times more damaging to the environment then Carbon Dioxide. It is because of this extremely high number that you will not find too many R-23 systems today. It is being replaced by more climate friendly refrigerants.

However, if you do run across one though you will need to know the pressure. Let’s take a look at our pressure chart below. (Note that the first pressure value is in Vacuum inches in Hg.):

Temp (F)Temp (C)Pressure (PSIG)
-119.92-84.44
-115.06-81.70.3
-110.02-78.92.9
-104.98-76.15.8
-99.94-73.39
-95.08-70.612.7
-90.04-67.816.7
-85-6521.3
-79.96-62.226.3
-74.92-59.431.8
-70.06-56.737.9
-65.02-53.944.6
-59.98-51.152
-54.94-48.360
-50.08-45.668.7
-45.04-42.878.1
-40-4088.3
-34.96-37.299.4
-29.92-34.4111
-25.06-31.7124
-20.02-28.9138

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-12 Pressure Chart

R-12 is one of those classic refrigerants that nearly everyone has heard of before. Even if you are not part of the industry chances are you have heard of R-12. You see, R-12 is a CFC refrigerant and was one of the first artificially created refrigerants to see widespread usage. It was in the 1930’s that the DuPont corporation teamed up with General Motors to come up with a safe, reliable, and cheap refrigerant. All of the previous refrigerants like ammonia, propane, isobutane, and even carbon dioxide all had their own problems. Sometimes it was flammability, toxicity, or operating pressure. Regardless of why these natural refrigerants weren’t working it was clear that the market needed a different kind of refrigerant.

It was during this partnership that we began to see the rise of artificial refrigerant classifications known as CFCs and HCFCs. Only shortly after their invention these new refrigerants began to take the world by storm. Not more then thirty years later and you could find R-12 all over the world in all kinds of different applications. Its explosive growth continued over the years. So did the related refrigerants known as R-11, R-22, R-502 and many others. The world was being filled with CFC and HCFC refrigerants.

It was in the 1980’s that a team of scientists discovered that these refrigerants did have a downside… and it was a big one. You see if these refrigerants were vented into the atmosphere either through damage, mistake, or malfeasance the chlorine in these refrigerants would make its way up into the Stratosphere. In here the sun’s ultraviolet rays would break down the chlorine. This broken down chlorine would chip away at what’s known as the Ozone layer. Eventually a hole developed which caused the world to band together and create a global treaty known as the Montreal Protocol. The treaty aimed at phasing out all of these Ozone damaging refrigerants.

One of the first refrigerants to go was our friend R-12. At this point in time, in the early 1990’s, R-12 had seen the majority of it’s usage in automobile air conditioning. R-12 was banned in new automobiles and was replaced with by the HFC refrigerant we all know today as R-134a. Now, there are still some R-12 applications out there today. Most of these are through antique car collectors but there are other applications out there as well.

If you are working on an R-12 machine you are going to need to know your pressures. Let’s take a look at our pressure chart. (Note that the first few pressure values  are in Vacuum inches in Hg.):

Temp (F)Temp (C)Pressure (PSIG)
-40-4011
-34.96-37.28.4
-29.92-34.45.5
-25.06-31.72.3
-20.02-28.90.6
-14.98-26.12.4
-9.94-23.34.5
-5.08-20.66.7
-0.04-17.89.2
5-1511.8
10.04-12.214.6
15.08-9.417.7
19.94-6.721
24.98-3.924.6
30.02-1.128.5
35.061.732.6
39.924.437
44.967.241.7
501046.7
55.0412.852
60.0815.657.7
64.9418.363.8
69.9821.170.2
75.0223.977
80.0626.784.2
84.9229.491.8
89.9632.299.8
9535108
100.0437.8117
105.0840.6127
109.9443.3136
114.9846.1147
120.0248.9158
125.0651.7169
129.9254.4181
134.9657.2194
14060207
145.0462.8220
150.0865.6234

 

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-502 Pressure Chart

R-502 is one of those refrigerants you just do not see around much anymore. R-502 is a CFC refrigerant just like its cousin refrigerant R-12 and R-11. All of these refrigerants were found to be damaging the Ozone layer when they were released into the atmosphere. Because of this, these refrigerants were phased out across the world through a global treaty known as the Montreal Protocol. R-12 was one of the first ones to go but R-502 wasn’t far behind. It’s complete phase out occurred in 1995.

Originally, R-502 was designed to operate in a low temperature refrigerant applications. It was meant as an alternative to the very popular HCFC known as R-22. R-502 had an overall lower discharge temperature and an improved capacity allowance when compared to R-22. This made it a great alternative… until the phase outs began. Nowadays it is a rare feat to find a functioning R-502 system. Most of these have been retired due to old age or they have been retrofitted to accept a new refrigerant. The most common replacement refrigerant was the HFC R-404A, but now even 404A is being phased out due to it’s high Global Warming Potential.

In the off chance that you do come across a R-502 application then you will need to know the pressures. Let’s take a look at our pressure chart below:

Temp (F)Temp (C)Pressure (PSIG)
-40-404.1
-34.96-37.26.5
-29.92-34.49.2
-25.06-31.712.1
-20.02-28.915.3
-14.98-26.118.8
-9.94-23.322.6
-5.08-20.626.7
-0.04-17.831.1
5-1535.9
10.04-12.241
15.08-9.446.5
19.94-6.752.4
24.98-3.958.8
30.02-1.165.6
35.061.772.8
39.924.480.5
44.967.288.7
501097.4
55.0412.8107
60.0815.6116
64.9418.3127
69.9821.1138
75.0223.9149
80.0626.7161
84.9229.4174
89.9632.2187
9535201
100.0437.8216
105.0840.6232
109.9443.3248
114.9846.1265
120.0248.9283
125.0651.7301
129.9254.4321
134.9657.2341
14060363

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-717 Ammonia Pressure Chart

Ammonia, also known as R-717, is one of the oldest refrigerants. It’s origins as a refrigerant can be traced all the way back to the 1800’s and it was one of the first refrigerants used in a variety of applications. It is also widely considered one of the most efficient refrigerants available. The downside though is that ammonia is toxic in small quantities and can be deadly when released in larger quantities.

When the first artificial refrigerants were invented in the 1930’s the world began to move away from the natural refrigerants including ammonia. These artificial refrigerants like R-12 and R-22 were becoming the refrigerant used in nearly every application.  It wasn’t until the 1980’s and 1990’s, when these artificial refrigerants began to be phased out, that we saw natural refrigerants began to rise again.

In today’s world R-717 has made an amazing comeback. It can be found in varying ranges of applications. Because it is so efficient it is often used in very large applications such as meat packing/processing plants, refrigerated warehousing, and even ice rinks. Unfortunately, these large quantities of ammonia can also lead to disaster if a leak occurs. In some extreme cases deaths have occurred due to large ammonia refrigerant leaks. It is always best practice to maintenance and take proper care of your system to ensure that no leaks can occur and if they do that they are minimal.

Let’s take a look at our pressure chart on ammonia:

Temp (F)Temp (C)Pressure (PSIG)
15870-13.1
-90.4-68-12.85
-86.8-66-12.58
-83.2-64-12.26
-79.6-62-11.91
-76-60-11.51
-72.4-58-11.07
-68.8-56-10.58
-65.2-54-10.04
-61.6-52-9.43
-58-50-8.77
-54.4-48-8.03
-50.8-46-7.22
-47.2-44-6.33
-43.6-42-5.36
-40-40-4.29
-36.4-38-3.13
-32.8-36-1.86
-29.2-34-0.49
-25.6-321.01
-22-302.63
-18.4-284.38
-14.8-266.27
-11.2-248.31
-7.6-2210.51
-4-2012.87
-0.4-1815.41
3.2-1618.13
6.8-1421.04
10.4-1224.15
14-1027.46
17.6-831.01
21.2-634.78
24.8-438.79
28.4-243.05
32047.57
35.6252.37
39.2457.45
42.8662.82
46.4868.5
501074.49
53.61280.82
57.21487.48
60.81694.5
64.418101.88
6820109.65
71.622117.8
75.224126.35
78.826135.31
82.428144.71
8630154.56
89.632164.85
93.234175.61
96.836186.86
100.438198.59
10440210.84
107.642223.62
111.244236.93
114.846250.81
118.448265.23
12250280.24
125.652295.86
129.254312.08
132.856328.93
136.458346.42
14060364.57
143.662383.39
147.264402.91
150.866423.14
154.468444.08
15870465.77

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-407C Pressure Chart

R-407C is one of the many replacement products for the now phased out R-22. R-22’s official phase down started in 2010 and the final phase out began on January 1st, 2020. Over that ten year period there were hundreds, and I really mean hundreds, of R-22 alternatives created. One of these replacement products was the hydroflurocarbon blend known as R-407C.

R-407C is a zeotropic blend of R-32 (Difluromethane), R-125, and R-134a (Tetrafluoroethane). It is not a drop in replacement on R-22 machines. If you wish to use this product you will need to vacate all of the old R-22 out of the system. This is due to the R-22 systems using mineral oil and this HFC blend using POE oil. You will also need to replace the compressor as well. If this is not done then you risk destroying your air conditioner.

It is difficult to say exactly how long R-407C will be around. With each year that passes the R-22 machines grow older and older. By the year 2030 there will be very few of them left. Before then though, R-407C will still be needed.

Let’s take a look at our pressure chart:

Temp (F)Temp (C)Liquid Pressure (PSIG)Vapor Pressure (PSIG)
-94-70-11.28-12.63
-90.4-68-10.82-12.32
-86.8-66-10.31-11.97
-83.2-64-9.75-11.59
-79.6-62-9.14-11.15
-76-60-8.46-10.67
-72.4-58-7.71-10.14
-68.8-56-6.9-9.55
-65.2-54-6.01-8.9
-61.6-52-5.04-8.19
-58-50-3.98-7.41
-54.4-48-2.84-6.55
-50.8-46-1.6-5.61
-47.2-44-0.26-4.59
-43.6-421.19-3.48
-40-402.75-2.27
-36.4-384.43-0.96
-32.8-366.230.46
-29.2-348.161.99
-25.6-3210.233.64
-22-3012.455.42
-18.4-2814.817.33
-14.8-2617.339.38
-11.2-2420.0111.58
-7.6-2222.8713.93
-4-2025.916.44
-0.4-1829.1219.12
3.2-1632.5321.98
6.8-1436.1425.02
10.4-1239.9628.25
14-1043.9931.68
17.6-848.2535.32
21.2-652.7339.17
24.8-457.4643.25
28.4-262.4347.56
32067.6552.11
35.6273.1456.92
39.2478.961.98
42.8684.9467.31
46.4891.2772.92
501097.8978.82
53.612104.8285.01
57.214112.0691.51
60.816119.6398.33
64.418127.53105.48
6820135.76112.96
71.622144.35120.79
75.224153.29128.98
78.826162.62137.55
82.428172.3146.48
8630182.38155.82
89.632192.86165.56
93.234203.74175.71
96.836215.04186.3
100.438226.77197.32
10440238.92208.8
107.642251.53220.75
111.244264.6233.19
114.846278.12246.12
118.448292.13259.56
12250306.63273.54
125.652321.62288.06
129.254337.14303.14
132.856353.18318.81
136.458369.74335.08
14060386.85351.97
143.662404.52369.52
147.264422.78387.73
150.866441.6406.65
154.468461.03426.31
15870481.05446.75

RefrigerantHQ's Pressure Charts

R-134a is the most common refrigerant found in automobiles today. It has been in use since the early 1990’s and now, in 2019, we are beginning to see it’s popularity wane with the rise of the new HFO refrigerant known as R-1234yf. That being said, there are still millions of cars on the road that use R-134a and there will be continue to be for at least another decade or more.

When something does go wrong with your car’s air conditioner  a lot of folks are not sure what to do or where to even start. One of the very first steps is to check the pressure of your system. Understanding the pressure that your system is at as well as knowing what the saturation point is of R-134a will allow you to properly diagnose what is wrong with your system. Remember, that air conditioning is basically changing the pressure on the refrigerant until a state change is reached. If your pressure is off then that could point you in the right direction.

With the facts behind you can then begin to determine if your compressor is at fault, perhaps your condenser, or it could be something as simple as your blower motor needing replaced. Without knowing the pressure in your system and the corresponding saturation point then you are in essence going in blind when you attempt to troubleshoot your air conditioning system. I can assure you that when you take your vehicle into a dealership that the pressure and temperature are one of the first things they check when troubleshooting.

For more information on R-134a click here to be taken to our official ‘R-134a Refrigerant Fact and Information Sheet.’ This fact sheet goes into anything and everything you’d ever want to know about R-134a. There’s quite a bit to read, but if it is definitely worth your while if you’re interesting learning more about this HFC refrigerant.

Our R-134a pressure chart can be found below:

°F°CPSIKPA
-49-4518.4126.9
-48-44.418124.1
-47-43.917.6121.3
-46-43.317.3119.3
-45-42.816.9116.5
-44-42.216.5113.8
-43-41.716.1111
-42-41.115.7108.2
-41-40.615.2104.8
-40-4014.8102
-39-39.414.499.3
-38-38.913.995.8
-37-38.313.492.4
-36-37.81389.6
-35-37.212.586.2
-34-36.71282.7
-33-36.111.478.6
-32-35.610.975.2
-31-3510.471.7
-30-34.49.867.6
-29-33.99.364.1
-28-33.38.760
-27-32.88.155.8
-26-32.27.551.7
-25-31.76.947.6
-24-31.16.343.4
-23-30.65.739.3
-22-30534.5
-21-29.44.329.6
-20-28.93.725.5
-19-28.3320.7
-18-27.82.315.9
-17-27.21.510.3
-16-26.70.85.5
-15-26.10.10.7
-14-25.60.42.8
-13-250.74.8
-12-24.41.17.6
-11-23.91.510.3
-10-23.31.913.1
-9-22.82.416.5
-8-22.22.819.3
-7-21.73.222.1
-6-21.13.624.8
-5-20.64.128.3
-4-204.631.7
-3-19.4534.5
-2-18.95.537.9
-1-18.3641.4
0-17.86.544.8
1-17.2748.3
2-16.77.551.7
3-16.1855.2
4-15.68.558.6
5-159.162.7
6-14.49.666.2
7-13.910.270.3
8-13.310.874.5
9-12.811.377.9
10-12.211.982
11-11.712.586.2
12-11.113.190.3
13-10.613.895.1
14-1014.499.3
15-9.415103.4
16-8.915.7108.2
17-8.316.4113.1
18-7.817117.2
19-7.217.7122
20-6.718.4126.9
21-6.119.1131.7
22-5.619.9137.2
23-520.6142
24-4.421.3146.9
25-3.922.1152.4
26-3.322.9157.9
27-2.823.7163.4
28-2.224.5168.9
29-1.725.3174.4
30-1.126.1180
31-0.626.9185.5
32027.8191.7
330.628.6197.2
341.129.5203.4
351.730.4209.6
362.231.3215.8
372.832.2222
383.333.1228.2
393.934.1235.1
404.435241.3
41536248.2
425.637255.1
436.138262
446.739268.9
457.240.1276.5
467.841.1283.4
478.342.2291
488.943.2297.9
499.444.3305.4
501045.4313
5110.646.6321.3
5211.147.7328.9
5311.748.9337.2
5412.250344.7
5512.851.2353
5613.352.4361.3
5713.953.6369.6
5814.454.9378.5
591556.1386.8
6015.657.4395.8
6116.158.7404.7
6216.760413.7
6317.261.3422.6
6417.862.7432.3
6518.364441.3
6618.965.4450.9
6719.466.8460.6
682068.2470.2
6920.669.7480.6
7021.171.1490.2
7121.772.6500.6
7222.274.1510.9
7322.875.6521.2
7423.377.1531.6
7523.978.7542.6
7624.480.2553
772581.8564
7825.683.4575
7926.185586.1
8026.786.7597.8
8127.288.4609.5
8227.890620.5
8328.391.8632.9
8428.993.5644.7
8529.495.2656.4
863097668.8
8730.698.8681.2
8831.1100.6693.6
8931.7102.5706.7
9032.2104.3719.1
9132.8106.2732.2
9233.3108.1745.3
9333.9110758.4
9434.4112772.2
9535114786
9635.6115.9799.1
9736.1118813.6
9836.7120827.4
9937.2122.1841.9
10037.8124.2856.3
10138.3126.3870.8
10238.9128.4885.3
10339.4130.6900.5
10440132.8915.6
10540.6135930.8
10641.1137.2946
10741.7139.5961.8
10842.2141.7977
10942.8144992.8
11043.3146.41009.4
11143.9148.71025.3
11244.4151.11041.8
11345153.51058.3
11445.61561075.6
11546.1158.41092.1
11646.7160.91109.4
11747.2163.51127.3
11847.81661144.5
11948.3168.61162.5
12048.9171.21180.4
12149.4173.81198.3
12250176.51216.9
12350.6179.11234.9
12451.1181.81253.5
12551.7184.61272.8
12652.2187.41292.1
12752.8190.21311.4
12853.31931330.7
12953.9195.81350
13054.4198.71370
13155201.61390
13255.6204.61410.7
13356.1207.61431.4
13456.7210.61452
13557.2213.61472.7
13657.8216.71494.1
13758.3219.81515.5
13858.9222.91536.8
13959.42261558.2
14060229.21580.3
14160.6232.51603
14261.1235.71625.1
14361.72391647.8
14462.2242.31670.6
14562.8245.71694
14663.3249.11717.5
14763.9252.51740.9
14864.4255.91764.4
14965259.41788.5
15065.6262.91812.6

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

Regardless of what system you are working on rather it is a home air conditioner, a vehicle’s air conditioner, a supermarket refrigeration system, or a large scale industrial application they all have one thing in common: Pressure.

Yes, as we all know one of the very first steps when it comes to diagnosing a refrigeration or air conditioning system is determining the various pressures that the system is operating at. Besides a simple visual inspection knowing the operating pressures of the machine is crucial. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what your subcool is and what is your superheat? Having and understanding these numbers is instrumental to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-744 Carbon Dioxide Pressure Chart

For those of us here in the United States coming across an R-744 Carbon Dioxide application may still be a rare occurrence. But, the world is changing and the popularity of this natural refrigerant is increasing. Along with the popularity the vast array of applications is increasing as well. You can find R-744 being used in vending machines, automobiles, supermarkets, and even in ice-skating rinks. The sheer versatility of R-744 and its climate friendliness is the reason we have seen such growth in its uses.

While we had mentioned earlier the concept of ‘subcool,’ it is important to note that in most cases R-744 applications do not have a subcool. This is because most R-744 systems operate as a transcritical system. Most refrigeration/air conditioning systems operate in what’s known as a subcritical process. This is your standard process that we are all used to. The difference with a R-744 application is that its operating temperatures can exceed the critical point temperature.  Carbon Dioxide’s critical temperature is just under eighty-eight degrees Fahrenheit. That eighty-eight degrees mark can easily be at or below the ambient temperature and when this occurs is when a transcritical system is required.

For more information on transcritical systems you can click here to be taken to our overview. The pressure and temperatures for R-744 can be found below:

°F°CPSIKPA
-68.8-5662.26429.3
-65.2-5469.13476.6
-61.6-5276.45527.1
-58.0-5084.25580.9
-54.4-4892.54638.0
-50.8-46101.33698.6
-47.2-44110.66763.0
-43.6-42120.53831.0
-40.0-40130.96902.9
-36.4-38141.98978.9
-32.8-36153.611059.1
-29.2-34165.871143.6
-25.6-32178.771232.6
-22.0-30192.341326.1
-18.4-28206.61424.5
-14.8-26221.561527.6
-11.2-24237.251635.8
-7.6-22253.691749.1
-4.0-20270.91867.8
-0.4-18288.911992.0
3.2-16307.752121.9
6.8-14327.412257.4
10.4-12347.962399.1
14.0-10369.372546.7
17.6-8391.72700.7
21.2-6414.982861.2
24.8-4439.213028.2
28.4-2464.423202.1
32.00490.653382.9
35.62517.943571.1
39.24546.293766.5
42.86575.753969.7
46.48606.364180.7
50.010638.134399.8
53.612671.124627.2
57.214705.354863.2
60.816740.885108.2
64.418777.755362.4
68.020816.035626.3
71.622855.765900.3
75.224897.036184.8
78.826939.956480.7

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available.

Thanks for reading,

Alec Johnson

RefrigerantHQ

Sources

RefrigerantHQ's Pressure Charts

The HFO R-1234yf is the refrigerant of the future. Or, at least, that is how it has been marketed. Yf was the first HFO refrigerant to see mainstream attention. A few years back there was immense pressure in the European Union to stop using the HFC R-134a for automotive air conditioning. The pressure was there due to the extremely high Global Warming Potential (GWP) that R-134a has. R-134a has a GWP of one-thousand four-hundred and thirty. It is classified as a super pollutant.

The answer to the world’s problems came with the announcement of the new HFO refrigerant known as R-1234yf. Yf refrigerant has a Global Warming Potential of only four. That is a huge difference when comparing it to other refrigerants on the market today. The only downside for yf is that it is rated as slightly flammable or 2L from ASHRAE and other air conditioning organizations.

The European Union quickly phased down and out R-134a and had their new vehicles start taking R-1234yf. While the acceptance of yf is much slower here in the United States there are numerous vehicle manufacturers who have begun using this refrigerant in their newer model vehicles. With each year that passes more and more vehicles begin taking yf.

To read more about 1234yf please click here to be taken to our official refrigerant fact sheet on yf.

1234yf Pressure Chart

One of the very first steps when it comes to diagnosing a vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

The chart below details the pressures and the saturation point, or boiling point, R-1234yf:

°F °C PSI KPA
-94 -70 -9.82 -67.7
-90.4 -68 -9.26 -63.8
-86.8 -66 -8.65 -59.6
-83.2 -64 -7.99 -55.1
-79.6 -62 -7.27 -50.1
-76 -60 -6.49 -44.7
-72.4 -58 -5.65 -39.0
-68.8 -56 -4.73 -32.6
-65.2 -54 -3.75 -25.9
-61.6 -52 -2.69 -18.5
-58 -50 -1.55 -10.7
-54.4 -48 -0.33 -2.3
-50.8 -46 0.99 6.8
-47.2 -44 2.39 16.5
-43.6 -42 3.89 26.8
-40 -40 5.49 37.9
-36.4 -38 7.19 49.6
-32.8 -36 9.01 62.1
-29.2 -34 10.94 75.4
-25.6 -32 12.99 89.6
-22 -30 15.17 104.6
-18.4 -28 17.47 120.5
-14.8 -26 19.91 137.3
-11.2 -24 22.49 155.1
-7.6 -22 25.21 173.8
-4 -20 28.08 193.6
-0.4 -18 31.11 214.5
3.2 -16 34.29 236.4
6.8 -14 37.64 259.5
10.4 -12 41.17 283.9
14 -10 44.87 309.4
17.6 -8 48.75 336.1
21.2 -6 52.82 364.2
24.8 -4 57.09 393.6
28.4 -2 61.56 424.4
32 0 66.23 456.6
35.6 2 71.11 490.3
39.2 4 76.21 525.4
42.8 6 81.54 562.2
46.4 8 87.09 600.5
50 10 92.89 640.5
53.6 12 98.92 682.0
57.2 14 105.21 725.4
60.8 16 111.75 770.5
64.4 18 118.55 817.4
68 20 125.63 866.2
71.6 22 132.98 916.9
75.2 24 140.62 969.5
78.8 26 148.54 1024.1
82.4 28 156.77 1080.9
86 30 165.3 1139.7
89.6 32 174.15 1200.7
93.2 34 183.32 1263.9
96.8 36 192.82 1329.4
100.4 38 202.65 1397.2
104 40 212.85 1467.5
107.6 42 223.39 1540.2
111.2 44 234.29 1615.4
114.8 46 245.57 1693.1
118.4 48 257.24 1773.6
122 50 269.31 1856.8
125.6 52 281.76 1942.7
129.2 54 94.75 653.3
132.8 56 100.09 690.1
136.4 58 105.62 728.2
140 60 111.34 767.7
143.6 62 117.26 808.5
147.2 64 123.38 850.7
150.8 66 129.71 894.3
154.4 68 136.26 939.5
158 70 143 986.0

 

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-32 Pressure Chart

The HFC R-32 refrigerant is quickly becoming popular, more so then it already was. Most of you know R-32 as a necessary component in the widely popular HFC blend known as R-410A Puron. R-32 along with R-125 gets you that R-410A that is found in nearly every air conditioner today.

However, in recent years there has been a push to slowly phase down R-410A. That is because of 410A’s very high Global Warming Potential, or GWP. The higher the GWP the more harm the refrigerant does to the climate. R-410A has a GWP of over two-thousand whereas R-32 has a GWP of only six-hundred and seventy-five.

While R-32 isn’t perfect it is a lot better then R-410A. That is why we are beginning to see a rise of usage of R-32 in the European Union and here in the United States as well. I do not foresee this becoming a long term trend but only as a temporary place holder until the world finds a more suitable R-410A replacement.

If you would like to read more about R-32 refrigerant please click here to be taken to our refrigerant fact sheet.

Let’s take a look at our pressure chart:

°F °C PSI KPA
-94 -70 -9.46 -65.2
-90.4 -68 -8.77 -60.5
-86.8 -66 -8.02 -55.3
-83.2 -64 -7.19 -49.6
-79.6 -62 -6.27 -43.2
-76 -60 -5.27 -36.3
-72.4 -58 -4.17 -28.8
-68.8 -56 -2.98 -20.5
-65.2 -54 -1.67 -11.5
-61.6 -52 -0.26 -1.8
-58 -50 1.28 8.8
-54.4 -48 2.95 20.3
-50.8 -46 4.75 32.8
-47.2 -44 6.69 46.1
-43.6 -42 8.78 60.5
-40 -40 11.04 76.1
-36.4 -38 13.45 92.7
-32.8 -36 16.05 110.7
-29.2 -34 18.82 129.8
-25.6 -32 21.79 150.2
-22 -30 24.96 172.1
-18.4 -28 28.34 195.4
-14.8 -26 31.94 220.2
-11.2 -24 35.77 246.6
-7.6 -22 39.83 274.6
-4 -20 44.15 304.4
-0.4 -18 48.72 335.9
3.2 -16 53.56 369.3
6.8 -14 58.68 404.6
10.4 -12 64.09 441.9
14 -10 69.79 481.2
17.6 -8 75.81 522.7
21.2 -6 82.15 566.4
24.8 -4 88.82 612.4
28.4 -2 95.84 660.8
32 0 103.21 711.6
35.6 2 110.95 765.0
39.2 4 119.07 821.0
42.8 6 127.58 879.6
46.4 8 136.49 941.1
50 10 145.81 1005.3
53.6 12 155.57 1072.6
57.2 14 165.76 1142.9
60.8 16 176.41 1216.3
64.4 18 187.53 1293.0
68 20 199.13 1373.0
71.6 22 211.21 1456.2
75.2 24 223.81 1543.1
78.8 26 236.93 1633.6
82.4 28 250.59 1727.8
86 30 264.8 1825.7
89.6 32 279.57 1927.6
93.2 34 294.93 2033.5
96.8 36 310.89 2143.5
100.4 38 327.47 2257.8
104 40 344.67 2376.4
107.6 42 362.51 2499.4
111.2 44 381.05 2627.2
114.8 46 400.24 2759.6
118.4 48 420.15 2896.8
122 50 440.79 3039.1
125.6 52 462.17 3186.6
129.2 54 484.33 3339.3
132.8 56 507.27 3497.5
136.4 58 531.02 3661.3
140 60 555.63 3830.9
143.6 62 581.1 4006.5
147.2 64 607.49 4188.5
150.8 66 634.81 4376.9
154.4 68 663.11 4572.0
158 70 692.45 4774.3

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-22 Pressure Chart

R-22 refrigerant is the major refrigerant, or… it was. R-22 was invented by a partnership with General Motors and DuPont back in the 1930’s. In the 1950’s the use of R-22 exploded and for nearly sixty years it was THE refrigerant to be used in home, office, and commercial air conditioning. Along with air conditioning it was also used in chillers, ice rinks, and many other applications.

It was in the 1980’s that it was discovered that R-22 was damaging the Ozone layer with the chlorine that it contained. In order to correct this R-22 was phased out across the world. Here in America our phase out began in 2010 and the refrigerant will be completely phased out in 2020. Taking R-22’s place is the HFC refrigerant blend known as R-410A, our Puron.

As I write this article, in 2019, there are still thousands of R-22 machines out there, but they are a dying breed and within the next ten to twenty years R-22 will be as rare to find as R-12 is today.

If you would like to read more about R-22 Freon  refrigerant please click here to be taken to our refrigerant fact sheet.

Let’s take a look at our pressure chart:

°F °C PSI KPA
-40 -40.0 0.5 3.4
-35 -37.2 2.6 17.9
-30 -34.4 4.9 33.8
-25 -31.7 7.4 51.0
-20 -28.9 10.1 69.6
-15 -26.1 13.2 91.0
-10 -23.3 16.5 113.8
-5 -20.6 20.1 138.6
0 -17.8 24 165.5
5 -15.0 28.2 194.4
10 -12.2 32.8 226.1
15 -9.4 37.7 259.9
20 -6.7 43 296.5
25 -3.9 48.8 336.5
30 -1.1 54.9 378.5
35 1.7 61.5 424.0
40 4.4 68.5 472.3
45 7.2 76 524.0
50 10.0 84 579.2
55 12.8 92.6 638.5
60 15.6 102 703.3
65 18.3 111 765.3
70 21.1 121 834.3
75 23.9 132 910.1
80 26.7 144 992.8
85 29.4 156 1075.6
90 32.2 168 1158.3
95 35.0 182 1254.8
100 37.8 196 1351.4
105 40.6 211 1454.8
110 43.3 226 1558.2
115 46.1 243 1675.4
120 48.9 260 1792.6
125 51.7 278 1916.7
130 54.4 297 2047.7
135 57.2 317 2185.6
140 60.0 337 2323.5
145 62.8 359 2475.2
150 65.6 382 2633.8

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-404A Pressure Chart

R-404A rose to prominence in the late 1990’s with the phasing out of CFC and HCFC refrigerants like R-12 and R-502. There had to be a replacement for the Ozone damaging refrigerants of the past and the successor was the HFC R-404A that we all know of today.

404A’s reign however was short lived. R-404A has one of the highest Global Warming Potential numbers of any modern day refrigerant and is known as a super pollutant. Because of this we are seeing various countries and manufacturers no longer using R-404A in new machinery. Instead, companies and countries are opting for more climate friendly refrigerants such as natural refrigerants, hydrocarbons, and newer less GWP heavy HFO refrigerants

If you would like to read more about R-404A  refrigerant please click here to be taken to our refrigerant fact sheet.

Let’s take a look at our pressure chart:

°F °C PSI KPA
-40 -40.0 4.3 29.6
-35 -37.2 6.8 46.9
-30 -34.4 9.5 65.5
-25 -31.7 12.5 86.2
-20 -28.9 15.7 108.2
-15 -26.1 19.3 133.1
-10 -23.3 23.2 160.0
-5 -20.6 27.5 189.6
0 -17.8 32.1 221.3
5 -15.0 37 255.1
10 -12.2 42.4 292.3
15 -9.4 48.2 332.3
20 -6.7 54.5 375.8
25 -3.9 61.2 422.0
30 -1.1 68.4 471.6
35 1.7 76.1 524.7
40 4.4 84.4 581.9
45 7.2 93.2 642.6
50 10.0 103 710.2
55 12.8 113 779.1
60 15.6 123 848.1
65 18.3 135 930.8
70 21.1 147 1013.5
75 23.9 159 1096.3
80 26.7 173 1192.8
85 29.4 187 1289.3
90 32.2 202 1392.7
95 35.0 218 1503.1
100 37.8 234 1613.4
105 40.6 252 1737.5
110 43.3 270 1861.6
115 46.1 289 1992.6
120 48.9 310 2137.4
125 51.7 331 2282.2
130 54.4 353 2433.9
135 57.2 377 2599.3
140 60.0 401 2764.8

 

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-410A Pressure Chart

R-410A, or Puron, is one of the most popular refrigerants in today’s modern world. However, if you rewind just fifteen or twenty years you would find that very little people even knew about it. Most contractors and technicians worked with R-22 systems for home and commercial air conditioning. R-22 had been the standard bearer refrigerant for nearly fifty years. However, R-22 harmed the Ozone Layer and a replacement refrigerant needed to be found. This is where our friend R-410A came into play. New machines from 2010 and onwards were banned from using R-22. Instead, they were outfitted with R-410A. 

If you would like to read more about R-410A  refrigerant please click here to be taken to our refrigerant fact sheet.

Let’s take a look at our pressure chart:

°F °C PSI KPA
–37.7 -38.7 12 82.7
–34.7 -37.0 14 96.5
–32.0 -35.6 16 110.3
–29.4 -34.1 18 124.1
–36.9 -38.3 20 137.9
–24.5 -31.4 22 151.7
–22.2 -30.1 24 165.5
–20.0 -29.0 26 179.3
–17.9 -27.7 28 193.1
–15.8 -26.6 30 206.8
–13.8 -25.4 32 220.6
–11.9 -24.4 34 234.4
–10.1 -23.4 36 248.2
–8.3 -22.4 38 262.0
–6.5 -21.4 40 275.8
–4.5 -20.3 42 289.6
–3.2 -19.6 44 303.4
–1.6 -18.7 46 317.2
0 -17.8 48 330.9
1.5 -16.9 50 344.7
3 -16.1 52 358.5
4.5 -15.3 54 372.3
5.9 -14.5 56 386.1
7.3 -13.7 58 399.9
8.6 -13.0 60 413.7
10 -12.2 62 427.5
11.3 -11.5 64 441.3
12.6 -10.8 66 455.1
13.8 -10.1 68 468.8
15.1 -9.4 70 482.6
16.3 -8.7 72 496.4
17.5 -8.1 74 510.2
18.7 -7.4 76 524.0
19.8 -6.8 78 537.8
21 -6.1 80 551.6
22.1 -5.5 82 565.4
23.2 -4.9 84 579.2
24.3 -4.3 86 592.9
25.4 -3.7 88 606.7
26.4 -3.1 90 620.5
27.4 -2.6 92 634.3
28.5 -1.9 94 648.1
29.5 -1.4 96 661.9
30.5 -0.8 98 675.7
31.2 -0.4 100 689.5
32.2 0.1 102 703.3
33.2 0.7 104 717.1
34.1 1.2 106 730.8
35.1 1.7 108 744.6
35.5 1.9 110 758.4
36.9 2.7 112 772.2
37.8 3.2 114 786.0
38.7 3.7 116 799.8
39.5 4.2 118 813.6
40.5 4.7 120 827.4
41.3 5.2 122 841.2
42.2 5.7 124 855.0
43 6.1 126 868.7
43.8 6.6 128 882.5
44.7 7.1 130 896.3
45.5 7.5 132 910.1
46.3 7.9 134 923.9
47.1 8.4 136 937.7
47.9 8.8 138 951.5
48.7 9.3 140 965.3
49.5 9.7 142 979.1
50.3 10.2 144 992.8
51.1 10.6 146 1006.6
51.8 11.0 148 1020.4
52.5 11.4 150 1034.2
53.3 11.8 152 1048.0
54 12.2 154 1061.8
54.8 12.7 156 1075.6
55.5 13.1 158 1089.4
56.2 13.4 160 1103.2
57 13.9 162 1117.0
57.7 14.3 164 1130.7
58.4 14.7 166 1144.5
59 15.0 168 1158.3
59.8 15.4 170 1172.1
60.5 15.8 172 1185.9
61.1 16.2 174 1199.7
61.8 16.6 176 1213.5
62.5 16.9 178 1227.3
63.1 17.3 180 1241.1
63.8 17.7 182 1254.8
64.5 18.1 184 1268.6
65.1 18.4 186 1282.4
65.8 18.8 188 1296.2
66.4 19.1 190 1310.0
67 19.4 192 1323.8
67.7 19.8 194 1337.6
68.3 20.2 196 1351.4
68.9 20.5 198 1365.2
69.5 20.8 200 1379.0
70.1 21.2 202 1392.7
70.7 21.5 204 1406.5
71.4 21.9 206 1420.3
72 22.2 208 1434.1
72.6 22.6 210 1447.9
73.2 22.9 212 1461.7
73.8 23.2 214 1475.5
74.3 23.5 216 1489.3
74.9 23.8 218 1503.1
75.5 24.2 220 1516.8
76.1 24.5 222 1530.6
76.7 24.8 224 1544.4
77.2 25.1 226 1558.2
77.8 25.4 228 1572.0
78.4 25.8 230 1585.8
78.9 26.1 232 1599.6
79.5 26.4 234 1613.4
80 26.7 236 1627.2
80.6 27.0 238 1641.0
81.1 27.3 240 1654.7
81.6 27.6 242 1668.5
82.2 27.9 244 1682.3
82.7 28.2 246 1696.1
83.3 28.5 248 1709.9
83.8 28.8 250 1723.7
84.3 29.1 252 1737.5
84.8 29.3 254 1751.3
85.4 29.7 256 1765.1
85.9 29.9 258 1778.8
86.4 30.2 260 1792.6
86.9 30.5 262 1806.4
87.4 30.8 264 1820.2
87.9 31.1 266 1834.0
88.4 31.3 268 1847.8
88.9 31.6 270 1861.6
89.4 31.9 272 1875.4
89.9 32.2 274 1889.2
90.4 32.4 276 1903.0
90.9 32.7 278 1916.7
91.4 33.0 280 1930.5
91.9 33.3 282 1944.3
92.4 33.6 284 1958.1
92.8 33.8 286 1971.9
93.3 34.1 288 1985.7
93.8 34.3 290 1999.5
94.3 34.6 292 2013.3
94.8 34.9 294 2027.1
95.2 35.1 296 2040.8
95.7 35.4 298 2054.6
96.2 35.7 300 2068.4
96.6 35.9 302 2082.2
97.1 36.2 304 2096.0
97.5 36.4 306 2109.8
98 36.7 308 2123.6
98.4 36.9 310 2137.4
98.9 37.2 312 2151.2
99.3 37.4 314 2165.0
99.7 37.6 316 2178.7
100.2 37.9 318 2192.5
100.7 38.2 320 2206.3
101.1 38.4 322 2220.1
101.6 38.7 324 2233.9
102 38.9 326 2247.7
102.4 39.1 328 2261.5
102.9 39.4 330 2275.3
103.3 39.6 332 2289.1
103.7 39.8 334 2302.8
104.2 40.1 336 2316.6
104.6 40.3 338 2330.4
105.1 40.6 340 2344.2
105.4 40.8 342 2358.0
105.8 41.0 344 2371.8
106.3 41.3 346 2385.6
106.6 41.4 348 2399.4
107.1 41.7 350 2413.2
107.5 41.9 352 2427.0
107.9 42.2 354 2440.7
108.3 42.4 356 2454.5
108.8 42.7 358 2468.3
109.2 42.9 360 2482.1
109.6 43.1 362 2495.9
110 43.3 364 2509.7
110.4 43.6 366 2523.5
110.8 43.8 368 2537.3
111.2 44.0 370 2551.1
111.6 44.2 372 2564.9
112 44.4 374 2578.6
112.4 44.7 376 2592.4
112.6 44.8 378 2606.2
113.1 45.1 380 2620.0
113.5 45.3 382 2633.8
113.9 45.5 384 2647.6
114.3 45.7 386 2661.4
114.7 45.9 388 2675.2
115 46.1 390 2689.0
115.5 46.4 392 2702.7
115.8 46.6 394 2716.5
116.2 46.8 396 2730.3
116.6 47.0 398 2744.1
117 47.2 400 2757.9
117.3 47.4 402 2771.7
117.7 47.6 404 2785.5
118.1 47.8 406 2799.3
118.5 48.1 408 2813.1
118.8 48.2 410 2826.9
119.2 48.4 412 2840.6
119.6 48.7 414 2854.4
119.9 48.8 416 2868.2
120.3 49.1 418 2882.0
120.7 49.3 420 2895.8
121 49.4 422 2909.6
121.4 49.7 424 2923.4
121.7 49.8 426 2937.2
122.1 50.1 428 2951.0
122.5 50.3 430 2964.7
122.8 50.4 432 2978.5
123.2 50.7 434 2992.3
123.5 50.8 436 3006.1
123.9 51.1 438 3019.9
124.2 51.2 440 3033.7
124.6 51.4 442 3047.5
124.9 51.6 444 3061.3
125.3 51.8 446 3075.1
125.6 52.0 448 3088.9
126 52.2 450 3102.6
126.3 52.4 452 3116.4
126.6 52.6 454 3130.2
127 52.8 456 3144.0
127.3 52.9 458 3157.8
127.7 53.2 460 3171.6
128 53.3 462 3185.4
128.3 53.5 464 3199.2
128.7 53.7 466 3213.0
129 53.9 468 3226.7
129.3 54.1 470 3240.5
129.7 54.3 472 3254.3
130 54.4 474 3268.1
130.3 54.6 476 3281.9
130.7 54.8 478 3295.7
131 55.0 480 3309.5
131.3 55.2 482 3323.3
131.6 55.3 484 3337.1
132 55.6 486 3350.9
132.3 55.7 488 3364.6
132.6 55.9 490 3378.4
132.9 56.1 492 3392.2
133.3 56.3 494 3406.0
133.6 56.4 496 3419.8
133.9 56.6 498 3433.6
134 56.7 500 3447.4
134.5 56.9 502 3461.2
134.8 57.1 504 3475.0
135.2 57.3 506 3488.7
135.5 57.5 508 3502.5
135.8 57.7 510 3516.3
136.1 57.8 512 3530.1
136.4 58.0 514 3543.9
136.7 58.2 516 3557.7
137 58.3 518 3571.5
137.3 58.5 520 3585.3
137.6 58.7 522 3599.1
137.9 58.8 524 3612.9
138.3 59.1 526 3626.6
138.6 59.2 528 3640.4
138.9 59.4 530 3654.2
139.2 59.6 532 3668.0
139.5 59.7 534 3681.8
139.8 59.9 536 3695.6
140.1 60.1 538 3709.4
140.4 60.2 540 3723.2
141 60.6 544 3750.7
141.6 60.9 548 3778.3
142.1 61.2 552 3805.9
142.7 61.5 556 3833.5
143.3 61.8 560 3861.1
143.9 62.2 564 3888.6
144.5 62.5 568 3916.2
145 62.8 572 3943.8
145.6 63.1 576 3971.4
146.2 63.4 580 3999.0
146.7 63.7 584 4026.5
147.3 64.1 588 4054.1
147.9 64.4 592 4081.7
148.4 64.7 596 4109.3
149 65.0 600 4136.9
149.5 65.3 604 4164.4
150.1 65.6 608 4192.0
150.6 65.9 612 4219.6
151.2 66.2 616 4247.2
151.7 66.5 620 4274.8
152.3 66.8 624 4302.3
152.8 67.1 628 4329.9
153.4 67.4 632 4357.5
153.9 67.7 636 4385.1
154.5 68.1 640 4412.6
155 68.3 644 4440.2
155.5 68.6 648 4467.8
156.1 68.9 652 4495.4
156.6 69.2 656 4523.0
157.1 69.5 660 4550.5
157.7 69.8 664 4578.1
158.2 70.1 668 4605.7
158.7 70.4 672 4633.3
159.2 70.7 676 4660.9
159.8 71.0 680 4688.4
160.3 71.3 684 4716.0
160.8 71.6 688 4743.6
161.3 71.8 692 4771.2
161.8 72.1 696 4798.8

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-290 Pressure Chart

A few decades ago very few people had heard of using propane as a refrigerant. Propane was the stuff you use in your grill and what powered your forklift. While the concept of using R-290 as a refrigerant had been around for over a century it was rarely used due to the flammability risk. Over the years though technology has improved and the need for an environmentally refrigerant has surfaced. The HFC refrigerants that most of the world uses today have a huge impact on Global Warming and an alternative needed to be found. Propane provides the answer to that alternative. Already today in the United States we are seeing propane in vending machines, ice machines, stand alone supermarket refrigerators/freezers, and in many other applications. As time moves forward and the Environmental Protection Agency becomes more comfortable with R-290 we may begin to see more and more applications be authorized to use propane. 

If you would like to read more about R-290 propane refrigerant please click here to be taken to our refrigerant fact sheet.

Let’s take a look at our pressure chart:

°F °C PSI KPA
-40 -40 1.4 9.7
-35 -37 3.4 23.4
-30 -34 5.7 39.3
-25 -32 8.1 55.8
-20 -29 10.7 73.8
-15 -26 13.6 93.8
-10 -23 16.7 115.1
-5 -21 20.1 138.6
0 -18 23.7 163.4
5 -15 27.6 190.3
10 -12 31.8 219.3
15 -9 36.3 250.3
20 -7 41.1 283.4
25 -4 46.3 319.2
30 -1 51.8 357.15
35 2 57.7 397.8
40 4 63.9 440.6
45 7 70.6 486.8
50 10 77.6 535
55 13 85.1 586.7
60 16 93 641.2
65 18 101.4 699.1
70 21 110.2 759.8
75 24 119.5 823.9
80 27 129.3 891.5
85 29 139.7 963.2
90 32 150.5 1037.7
95 35 161.9 1116.3
100 38 173.9 1198.9
105 41 186.5 1285.8
110 43 199.6 1376.2
115 46 213.4 1471.3
120 49 227.8 1570.6
125 52 242.9 1674.7
130 54 258.7 1783.7
135 57 275.1 1896.7
140 60 292.3 2015.3
145 63 310.2 2138.7
150 66 328.9 2267.7
155 68 348.4 2402.1
160 71 368.7 2542.1

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner

RefrigerantHQ's Pressure Charts

One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the superheat  numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system.

After a visual inspection the very next step for the most seasoned technicians is pulling out their gauges and checking the pressure and temperature. It just becomes second nature after enough calls. I have heard stories of rookie techs calling some of the pros on their team for help on a system that they’re stuck on. It doesn’t matter what the situation is. It doesn’t matter if you’re in Miami or in Fargo. It will never fail that one of the first questions the pros ask the rookie is what is your subcool and what is your superheat? Having  and understanding these numbers is key to figuring out what to do next.

But, these numbers won’t do you any good if you don’t know what refrigerant you are dealing with and what the refrigerant’s boiling point is at each pressure level. This article aims at providing you with just that information.

R-600a Pressure Chart

Isobutane is being seen more and more across the world. This holds especially true as various countries begin to phase out the ever common HFC refrigerants such as R-404A and R-134a. There will come a time where HFCs area thing of the past and we need to be ready for it. Today we are seeing isobutane based systems in home refrigerators/freezers, vending machines, ice machines, stand alone supermarket refrigerators/freezers, and many more expanding options. While they are quite popular in Europe and in Asia it is only a matter of time before they start showing up in United States. If you haven’t run into one of these systems yet then it’s only a matter of time. For more information on R-600a please click here to be taken to our R-600a Refrigerant Fact Sheet.

Let’s take a look at our pressure chart:

°F °C psi kpa
-40 -40 4.16 28.7
-36 -38 4.6 31.75
-33 -36 5.08 35.05
-29 -34 5.6 38.62
-26 -32 6.16 42.47
-22 -30 6.76 46.62
-18 -28 7.41 51.09
-15 -26 8.11 55.9
-11 -24 8.85 61.05
-8 -22 9.66 66.57
-4 -20 10.51 72.48
0 -18 11.43 78.79
3 -16 12.4 85.52
7 -14 13.45 92.7
10 -12 14.55 100.33
14 -10 15.73 108.45
18 -8 16.98 117.07
21 -6 18.31 126.21
25 -4 19.71 135.89
28 -2 21.19 146.13
32 0 22.77 156.96
36 2 24.42 168.39
39 4 26.17 180.45
43 6 28.02 193.16
46 8 29.96 206.54
50 10 32 220.61
54 12 34.14 235.41
57 14 36.4 250.94
61 16 38.76 267.24
64 18 41.24 284.32
68 20 43.83 302.22
72 22 46.55 320.95
75 24 49.39 340.54
79 26 52.36 361.02
82 28 55.46 382.4
86 30 58.7 404.72
90 32 62.08 428
93 34 65.6 452.26
97 36 69.26 477.53
100 38 73.08 503.84
104 40 77.05 531.21
108 42 81.17 559.66
111 44 85.46 589.23
115 46 89.92 619.95
118 48 94.54 651.82
122 50 99.34 684.9
126 52 104.31 719.19
129 54 109.47 754.74
133 56 114.81 791.56

Conclusion

There you have it folks. I hope this article was helpful and if you find that something is inaccurate here in my chart please do not hesitate to reach out to me. I have sourced this the best I could but there is always going to be conflicting data.  I’ve seen it multiple times on various refrigerants. I’ll search for a refrigerant’s pressure chart and get various results all showing different pounds per square inch temperatures.

The aim with this article is to give you accurate information so again, if you see anything incorrect please let me know by contacting me here. On top of this post we are also working on a comprehensive refrigerant pressure/temperature listing. The goal is to have every refrigerant out there listed with a pressure/temperature chart that is easily available. 

Thanks for reading,

Alec Johnson

RefrigerantHQ

Owner