Hello, readers welcome to the new post. here we will discuss R134A Pressure-Temperature Chart. R134a refrigerant is ethane-based hydrofluorocarbon used in a different type of refrigeration instrument, HVAC, and in vehicles. it is used as a replacement for R12 refrigerant and is considered a safe option due to its non-toxic and non-flammable features. It does not get corroded. Here we will make its pressure temperature charge for further understanding. let’s get started with the R134A Pressure-Temperature Chart.
R134A Pressure-Temperature Chart
R-134a (psig) Pressure-Temperature Chart | |||||||
Temp. (°F) |
Pressure (psig) |
Temp. (°F) |
Pressure (psig) |
Temp. (°F) |
Pressure (psig) |
Temp. (°F) |
Pressure (psig) |
-49 | 18.4 | 1 | 7.0 | 51 | 46.6 | 101 | 126.3 |
-48 | 18.0 | 2 | 7.5 | 52 | 47.7 | 102 | 128.4 |
-47 | 17.6 | 3 | 8.0 | 53 | 48.9 | 103 | 130.6 |
-46 | 17.3 | 4 | 8.5 | 54 | 50.0 | 104 | 132.8 |
-45 | 16.9 | 5 | 9.1 | 55 | 51.2 | 105 | 135.0 |
-44 | 16.5 | 6 | 9.6 | 56 | 52.4 | 106 | 137.2 |
-43 | 16.1 | 7 | 10.2 | 57 | 53.6 | 107 | 139.5 |
-42 | 15.7 | 8 | 10.8 | 58 | 54.9 | 108 | 141.7 |
-41 | 15.2 | 9 | 11.3 | 59 | 56.1 | 109 | 144.0 |
-40 | 14.8 | 10 | 11.9 | 60 | 57.4 | 110 | 146.4 |
-39 | 14.4 | 11 | 12.5 | 61 | 58.7 | 111 | 148.7 |
-38 | 13.9 | 12 | 13.1 | 62 | 60.0 | 112 | 151.1 |
-37 | 13.4 | 13 | 13.8 | 63 | 61.3 | 113 | 153.5 |
-36 | 13.0 | 14 | 14.4 | 64 | 62.7 | 114 | 156.0 |
-35 | 12.5 | 15 | 15.0 | 65 | 64.0 | 115 | 158.4 |
-34 | 12.0 | 16 | 15.7 | 66 | 65.4 | 116 | 160.9 |
-33 | 11.4 | 17 | 16.4 | 67 | 66.8 | 117 | 163.5 |
-32 | 10.9 | 18 | 17.0 | 68 | 68.2 | 118 | 166.0 |
-31 | 10.4 | 19 | 17.7 | 69 | 69.7 | 119 | 168.6 |
-30 | 9.8 | 20 | 18.4 | 70 | 71.1 | 120 | 171.2 |
-29 | 9.3 | 21 | 19.1 | 71 | 72.6 | 121 | 173.8 |
-28 | 8.7 | 22 | 19.9 | 72 | 74.1 | 122 | 176.5 |
-27 | 8.1 | 23 | 20.6 | 73 | 75.6 | 123 | 179.1 |
-26 | 7.5 | 24 | 21.3 | 74 | 77.1 | 124 | 181.8 |
-25 | 6.9 | 25 | 22.1 | 75 | 78.7 | 125 | 184.6 |
-24 | 6.3 | 26 | 22.9 | 76 | 80.2 | 126 | 187.4 |
-23 | 5.7 | 27 | 23.7 | 77 | 81.8 | 127 | 190.2 |
-22 | 5.0 | 28 | 24.5 | 78 | 83.4 | 128 | 193.0 |
-21 | 4.3 | 29 | 25.3 | 79 | 85.0 | 129 | 195.8 |
-20 | 3.7 | 30 | 26.1 | 80 | 86.7 | 130 | 198.7 |
-19 | 3.0 | 31 | 26.9 | 81 | 88.4 | 131 | 201.6 |
-18 | 2.3 | 32 | 27.8 | 82 | 90.0 | 132 | 204.6 |
-17 | 1.5 | 33 | 28.6 | 83 | 91.8 | 133 | 207.6 |
-16 | 0.8 | 34 | 29.5 | 84 | 93.5 | 134 | 210.6 |
-15 | 0.1 | 35 | 30.4 | 85 | 95.2 | 135 | 213.6 |
-14 | 0.4 | 36 | 31.3 | 86 | 97.0 | 136 | 216.7 |
-13 | 0.7 | 37 | 32.2 | 87 | 98.8 | 137 | 219.8 |
-12 | 1.1 | 38 | 33.1 | 88 | 100.6 | 138 | 222.9 |
-11 | 1.5 | 39 | 34.1 | 89 | 102.5 | 139 | 226.0 |
-10 | 1.9 | 40 | 35.0 | 90 | 104.3 | 140 | 229.2 |
-9 | 2.4 | 41 | 36.0 | 91 | 106.2 | 141 | 232.5 |
-8 | 2.8 | 42 | 37.0 | 92 | 108.1 | 142 | 235.7 |
-7 | 3.2 | 43 | 38.0 | 93 | 110.0 | 143 | 239.0 |
-6 | 3.6 | 44 | 39.0 | 94 | 112.0 | 144 | 242.3 |
-5 | 4.1 | 45 | 40.1 | 95 | 114.0 | 145 | 245.7 |
-4 | 4.6 | 46 | 41.1 | 96 | 115.9 | 146 | 249.1 |
-3 | 5.0 | 47 | 42.2 | 97 | 118.0 | 147 | 252.5 |
-2 | 5.5 | 48 | 43.2 | 98 | 120.0 | 148 | 255.9 |
-1 | 6.0 | 49 | 44.3 | 99 | 122.1 | 149 | 259.4 |
0 | 6.5 | 50 | 45.4 | 100 | 124.2 | 150 | 262.9 |
Properties of R134a Refrigerant
- The main features of R134a refrigerant are listed here
- its boiling point is -14.9°F (-26.1°C)
- its critical temperature is 252°F (122°C)
- Auto ignition temperature value is 1,418°F (770°C)
- Ozone depletion level (ODL) is zero 0
- Global warming potential (GWP) value is1,430
Alternate for R12 Refrigerant
As R134a refrigerant comes with less volume as compare to refrigerant and charge required for accurate configuration when retrofitting a unit from R12 to R134a. The unit normally needs to modified for accommodation of the new refrigerant. Such as there is a need to reconfigure the condenser and evaporate in the unit and install small-size hoses.