Hello readers welcome to the new post. Here we will discuss the R22 Pressure Temperature Chart. R22 PT chart was used to make the relationship between pressure and temperature. It is used to explain the value of pressure of R22 refrigerant for a certain value of temperature. These values of temperature and pressure are used to diagnose the working of refrigerant and air conditioners. Let’s get started with the R22 Pressure Temperature Chart.
R22 Pressure Temperature Chart
| Pressure-Temperature Data for R-22 (psig) | |||||||||||
| Temp. (°F) |
Temp. (°C) |
Pressure (psig) |
Temp. (°F) |
Temp. (°C) |
Pressure (psig) |
Temp. (°F) |
Temp. (°C) |
Pressure (psig) |
Temp. (°F) |
Temp. (°C) |
Pressure (psig) |
| -49 | -45.0 | 5.4 | 1 | -17.2 | 24.9 | 51 | 10.6 | 85.7 | 101 | 38.3 | 198.8 |
| -48 | -44.4 | 4.8 | 2 | -16.7 | 25.7 | 52 | 11.1 | 87.4 | 102 | 38.9 | 201.8 |
| -47 | -43.9 | 4.1 | 3 | -16.1 | 26.5 | 53 | 11.7 | 89.1 | 103 | 39.4 | 204.7 |
| -46 | -43.3 | 3.4 | 4 | -15.6 | 27.4 | 54 | 12.2 | 90.8 | 104 | 40.0 | 207.7 |
| -45 | -42.8 | 2.7 | 5 | -15.0 | 28.3 | 55 | 12.8 | 92.6 | 105 | 40.6 | 210.8 |
| -44 | -42.2 | 1.9 | 6 | -14.4 | 29.2 | 56 | 13.3 | 94.4 | 106 | 41.1 | 213.8 |
| -43 | -41.7 | 1.2 | 7 | -13.9 | 30.1 | 57 | 13.9 | 96.1 | 107 | 41.7 | 216.9 |
| -42 | -41.1 | 0.4 | 8 | -13.3 | 31.0 | 58 | 14.4 | 98.0 | 108 | 42.2 | 220.0 |
| -41 | -40.6 | 0.2 | 9 | -12.8 | 31.9 | 59 | 15.0 | 99.8 | 109 | 42.8 | 223.2 |
| -40 | -40.0 | 0.6 | 10 | -12.2 | 32.8 | 60 | 15.6 | 101.6 | 110 | 43.3 | 226.4 |
| -39 | -39.4 | 1.0 | 11 | -11.7 | 33.8 | 61 | 16.1 | 103.5 | 111 | 43.9 | 229.6 |
| -38 | -38.9 | 1.4 | 12 | -11.1 | 34.8 | 62 | 16.7 | 105.4 | 112 | 44.4 | 232.8 |
| -37 | -38.3 | 1.8 | 13 | -10.6 | 35.8 | 63 | 17.2 | 107.3 | 113 | 45.0 | 236.1 |
| -36 | -37.8 | 2.2 | 14 | -10.0 | 36.8 | 64 | 17.8 | 109.3 | 114 | 45.6 | 239.4 |
| -35 | -37.2 | 2.6 | 15 | -9.4 | 37.8 | 65 | 18.3 | 111.3 | 115 | 46.1 | 242.8 |
| -34 | -36.7 | 3.1 | 16 | -8.9 | 38.8 | 66 | 18.9 | 113.2 | 116 | 46.7 | 246.1 |
| -33 | -36.1 | 3.5 | 17 | -8.3 | 39.9 | 67 | 19.4 | 115.3 | 117 | 47.2 | 249.5 |
| -32 | -35.6 | 4.0 | 18 | -7.8 | 40.9 | 68 | 20.0 | 117.3 | 118 | 47.8 | 253.0 |
| -31 | -35.0 | 4.5 | 19 | -7.2 | 42.0 | 69 | 20.6 | 119.4 | 119 | 48.3 | 256.5 |
| -30 | -34.4 | 4.9 | 20 | -6.7 | 43.1 | 70 | 21.1 | 121.4 | 120 | 48.9 | 260.0 |
| -29 | -33.9 | 5.4 | 21 | -6.1 | 44.2 | 71 | 21.7 | 123.6 | 121 | 49.4 | 263.5 |
| -28 | -33.3 | 5.9 | 22 | -5.6 | 45.3 | 72 | 22.2 | 125.7 | 122 | 50.0 | 267.1 |
| -27 | -32.8 | 6.4 | 23 | -5.0 | 46.5 | 73 | 22.8 | 127.8 | 123 | 50.6 | 270.7 |
| -26 | -32.2 | 6.9 | 24 | -4.4 | 47.6 | 74 | 23.3 | 130.0 | 124 | 51.1 | 274.3 |
| -25 | -31.7 | 7.4 | 25 | -3.9 | 48.8 | 75 | 23.9 | 132.2 | 125 | 51.7 | 278.0 |
| -24 | -31.1 | 8.0 | 26 | -3.3 | 50.0 | 76 | 24.4 | 134.5 | 126 | 52.2 | 281.7 |
| -23 | -30.6 | 8.5 | 27 | -2.8 | 51.2 | 77 | 25.0 | 136.7 | 127 | 52.8 | 285.4 |
| -22 | -30.0 | 9.1 | 28 | -2.2 | 52.4 | 78 | 25.6 | 139.0 | 128 | 53.3 | 289.2 |
| -21 | -29.4 | 9.6 | 29 | -1.7 | 53.7 | 79 | 26.1 | 141.3 | 129 | 53.9 | 293.0 |
| -20 | -28.9 | 10.2 | 30 | -1.1 | 55.0 | 80 | 26.7 | 143.6 | 130 | 54.4 | 296.9 |
| -19 | -28.3 | 10.8 | 31 | -0.6 | 56.2 | 81 | 27.2 | 146.0 | 131 | 55.0 | 300.8 |
| -18 | -27.8 | 11.4 | 32 | 0.0 | 57.5 | 82 | 27.8 | 148.4 | 132 | 55.6 | 304.7 |
| -17 | -27.2 | 12.0 | 33 | 0.6 | 58.8 | 83 | 28.3 | 150.8 | 133 | 56.1 | 308.7 |
| -16 | -26.7 | 12.6 | 34 | 1.1 | 60.2 | 84 | 28.9 | 153.2 | 134 | 56.7 | 312.6 |
| -15 | -26.1 | 13.2 | 35 | 1.7 | 61.5 | 85 | 29.4 | 155.7 | 135 | 57.2 | 316.7 |
| -14 | -25.6 | 13.9 | 36 | 2.2 | 62.9 | 86 | 30.0 | 158.2 | 136 | 57.8 | 320.7 |
| -13 | -25.0 | 14.5 | 37 | 2.8 | 64.3 | 87 | 30.6 | 160.7 | 137 | 58.3 | 324.8 |
| -12 | -24.4 | 15.2 | 38 | 3.3 | 65.7 | 88 | 31.1 | 163.2 | 138 | 58.9 | 329.0 |
| -11 | -23.9 | 15.9 | 39 | 3.9 | 67.1 | 89 | 31.7 | 165.8 | 139 | 59.4 | 333.2 |
| -10 | -23.3 | 16.5 | 40 | 4.4 | 68.6 | 90 | 32.2 | 168.4 | 140 | 60.0 | 337.4 |
| -9 | -22.8 | 17.2 | 41 | 5.0 | 70.0 | 91 | 32.8 | 171.0 | 141 | 60.6 | 341.6 |
| -8 | -22.2 | 17.9 | 42 | 5.6 | 71.5 | 92 | 33.3 | 173.7 | 142 | 61.1 | 345.9 |
| -7 | -21.7 | 18.7 | 43 | 6.1 | 73.0 | 93 | 33.9 | 176.4 | 143 | 61.7 | 350.3 |
| -6 | -21.1 | 19.4 | 44 | 6.7 | 74.5 | 94 | 34.4 | 179.1 | 144 | 62.2 | 354.6 |
| -5 | -20.6 | 20.1 | 45 | 7.2 | 76.1 | 95 | 35.0 | 181.8 | 145 | 62.8 | 359.0 |
| -4 | -20.0 | 20.9 | 46 | 7.8 | 77.6 | 96 | 35.6 | 184.6 | 146 | 63.3 | 363.5 |
| -3 | -19.4 | 21.7 | 47 | 8.3 | 79.2 | 97 | 36.1 | 187.4 | 147 | 63.9 | 368.0 |
| -2 | -18.9 | 22.4 | 48 | 8.9 | 80.8 | 98 | 36.7 | 190.2 | 148 | 64.4 | 372.5 |
| -1 | -18.3 | 23.2 | 49 | 9.4 | 82.4 | 99 | 37.2 | 193.0 | 149 | 65.0 | 377.1 |
| 0 | -17.8 | 24.0 | 50 | 10.0 | 84.1 | 100 | 37.8 | 195.9 | 150 | 65.6 | 381.7 |
What should my pressures be for R-22?
Most engineers and technicians in HVAC know the normal range of working low-pressure of ac systems. That is about 60 PSI to 85 PSI for R-22 and can be 105 PSI to 143 PSI for R-410A based on working conditions.
What is R-22 discharge in suction pressure?
The suction pressure of AC for R22 refrigerant is about 60 TO 70 PSI and the discharge pressure is 250 TO 300.
What is boiling point of R-22?
R22 is a colorless, odorless gas and has a boiling point of about -41.44°F (-40.8°C).
What are the characteristics of R22?
R22 refrigerant gas Difluorochloromethane composed another name is Monochlorodifluoromethane, freon, with short-form HCFC-22, and CHClF2 as its chemical formula. R22 refrigerant gas is hydrogen having chlorofluorocarbon, which is a colorless gas having a sweet smell.
What is an AC PT chart?
The conventional PT chart defines the saturated refrigerant pressure, in Psig with a column of pressure on the left side. Single refrigerant components and azeotropes boil and condense at a single temperature for a given pressure.
How much R-22 is in a 5 ton unit?
The details used for measuring the amount of Freon in residential AC units is 2 to four pounds per ton of cooling. Such as if you connect a new AC system rated for 5 ton load system will need 10-20 pounds of refrigerant.
Do you charge R-22 on the high or low side?
R22 or R134a can be charged in any way
What is the normal suction pressure?
The suction pressure must be kept at less than 200mmHg for adults. it must be set at 80mmHg to 120mmHg in neonates. The catheter size for suction must be less than fifty percent of the inner diameter of the endotracheal tube. The common conversion is one mm diameter tha is equal to 3 French.
Is R22 flammable?
R22a is a hydrogen refrigerant blend with main components like flammable materials like propane and butane. In some conditions, it also has a small quantity of hydrocarbons or a pine-scented odorant. It is a highly flammable, colorless gas that is heavier than air
What does R22 stand for?
Chlorodifluoromethane or difluoromonochloromethane is a hydrochlorofluorocarbon (HCFC). It is a colorless gas and called HCFC-22, or R-22, or CHClF. 2. . It is used as a propellant and refrigerant.
Is R22 a CFC?
R-22 is an HCFC refrigerant used in air conditioner instruments. To protect the earth’s ozone layer the USA is phasing out R22 with other chemicals.
Is R22 toxic?
It has Chlorodifluoromethane the HCFC material that harms the health and environment through destroying ozone in upper temperatures. Ozone layer destruction can cause an increment in UV radiation that can cause skin cancer and eye cataracts.
What is R22 in AC?
If you have an AC system more than ten years old there can be a chance of R22 use and that is known as Freon. R22 is an A/C refrigerant used in AC systems for cooling.
What is the cylinder Colour code of R-22 refrigerant?
light green
R22 Refrigerant Gas Features
| Boiling point | -40.8 ℃ | ||
| Critical temperature | 96.24℃ | ||
| Gas Density | 3.03 | ||
| Liquid Density | 1.194 g/cm3 （25 ℃） | ||
| Ozone Depletion Potential (ODP) | 0.034 | ||
| Global Warming Potential(GWP) 100Years | 1700 | ||
| ASHARE Security classification | A1/A1 | ||
| Flammability (1 standard atmospheric pressure. , 18 °C) | Non-flammable | ||
| Critical pressure | 4980kPa | ||
| Smell | Slight odor | ||
| Morphology | Liquefied Gases | ||
| Color | Clean, colorless | ||
| Latent heat of evaporation (at boiling point conditions) | 233KJ/kg | ||
| Evaporation Pressure | 1044kPa （25 ℃） | ||
Does R22 leak?
The R22 refrigerant causes cooling in ac unit and if gas leaks out ac stops the cooling process. That casues the refrigerant leak
Why was R22 refrigerant banned?
R22 is a refrigerant that is used in AC systems. Since R22 affects the ozone layer. It is production is limited and in 2020 R22 will not made. After 2020 only recovered, recycled, or reclaimed supplies of R-22 is available.
Can you replace R22 with R410A?
We cannot replace these two since R410-A and R-22 come with different chemical features. R410-A works at high pressure. If we put R410A in the R22 system, the component will rupture due to high force.
Is R22 good for AC?
R22 is not used for installing new AC systems since it was stopped to use in 2010 due to the nature of hydro-chlorofluorocarbon (HCFC).
R22 Refrigerant Gas Application
R22 refrigerant gas is used for making tetrafluoroethylene and refrigerant, aerosol, and it is also used for making pesticides.
Sometime ago R22 refrigerant gas was also used for refrigeration instruments like AC, outdoor condensing units, HVAC units, etc.
It is also used for food storage and processing, ice machines, and transportation refrigeration.
Is R22 better than R410A?
The good operation is the main advantage of R410A. But it operates like R22 for absorbing heat to offer cooling. R410A does not make the room colder than older refrigerant. R410A helps to faster heat transfer than R22.
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