R-236fa PT Chart
A1 GWP 9810Pure refrigerant (1,1,1,3,3,3-Hexafluoropropane). HFC.
Boiling Point
29.3°F
-1.5°C
Critical Temp
256.9°F
124.9°C
Critical Pressure
462.8 psia
31.91 bar
About R-236fa
R-236fa is a niche HFC used as a replacement for R-114 in specialty centrifugal chillers (notably naval ships) and in fire suppression. Its pressures are low and its GWP is very high (9810), so it now appears mostly in legacy applications.
Saturation pressures at typical operating points, taken from the table below:
- Evaporator (40°F): 4.0 PSIG
- Condensing (100°F): 44.5 PSIG
The table covers -15°F to 250°F in 5°F steps. Below about 29°F the saturation pressure is below atmospheric, so gauges read in vacuum (shown in blue in the table).
R-236fa Pressure-Temperature Graph
R-236fa Saturation Pressure Table
Blue values indicate vacuum (below atmospheric pressure).
| °F | °C | PSIG | PSIA | kPa | bar |
|---|---|---|---|---|---|
| -15 | -26.1 | -10.0 | 4.65 | 32.1 | 0.321 |
| -10 | -23.3 | -9.3 | 5.37 | 37.0 | 0.37 |
| -5 | -20.6 | -8.5 | 6.17 | 42.6 | 0.426 |
| 0 | -17.8 | -7.6 | 7.08 | 48.8 | 0.488 |
| 5 | -15.0 | -6.6 | 8.08 | 55.7 | 0.557 |
| 10 | -12.2 | -5.5 | 9.19 | 63.4 | 0.634 |
| 15 | -9.4 | -4.3 | 10.43 | 71.9 | 0.719 |
| 20 | -6.7 | -2.9 | 11.79 | 81.3 | 0.813 |
| 25 | -3.9 | -1.4 | 13.28 | 91.6 | 0.916 |
| 30 | -1.1 | 0.2 | 14.93 | 102.9 | 1.029 |
| 35 | 1.7 | 2.0 | 16.73 | 115.3 | 1.153 |
| 40 | 4.4 | 4.0 | 18.69 | 128.9 | 1.289 |
| 45 | 7.2 | 6.1 | 20.84 | 143.7 | 1.437 |
| 50 | 10.0 | 8.5 | 23.16 | 159.7 | 1.597 |
| 55 | 12.8 | 11.0 | 25.69 | 177.1 | 1.771 |
| 60 | 15.6 | 13.7 | 28.43 | 196.0 | 1.96 |
| 65 | 18.3 | 16.7 | 31.38 | 216.4 | 2.164 |
| 70 | 21.1 | 19.9 | 34.57 | 238.3 | 2.383 |
| 75 | 23.9 | 23.3 | 38.0 | 262.0 | 2.62 |
| 80 | 26.7 | 27.0 | 41.69 | 287.4 | 2.874 |
| 85 | 29.4 | 30.9 | 45.64 | 314.7 | 3.147 |
| 90 | 32.2 | 35.2 | 49.88 | 343.9 | 3.439 |
| 95 | 35.0 | 39.7 | 54.4 | 375.1 | 3.751 |
| 100 | 37.8 | 44.5 | 59.24 | 408.5 | 4.085 |
| 105 | 40.6 | 49.7 | 64.4 | 444.0 | 4.44 |
| 110 | 43.3 | 55.2 | 69.89 | 481.9 | 4.819 |
| 115 | 46.1 | 61.0 | 75.73 | 522.1 | 5.221 |
| 120 | 48.9 | 67.2 | 81.93 | 564.9 | 5.649 |
| 125 | 51.7 | 73.8 | 88.51 | 610.3 | 6.103 |
| 130 | 54.4 | 80.8 | 95.48 | 658.3 | 6.583 |
| 135 | 57.2 | 88.2 | 102.86 | 709.2 | 7.092 |
| 140 | 60.0 | 96.0 | 110.67 | 763.0 | 7.63 |
| 145 | 62.8 | 104.2 | 118.91 | 819.8 | 8.198 |
| 150 | 65.6 | 112.9 | 127.61 | 879.8 | 8.798 |
| 155 | 68.3 | 122.1 | 136.78 | 943.0 | 9.43 |
| 160 | 71.1 | 131.7 | 146.44 | 1009.6 | 10.096 |
| 165 | 73.9 | 141.9 | 156.6 | 1079.8 | 10.798 |
| 170 | 76.7 | 152.6 | 167.3 | 1153.5 | 11.535 |
| 175 | 79.4 | 163.8 | 178.54 | 1231.0 | 12.31 |
| 180 | 82.2 | 175.6 | 190.35 | 1312.4 | 13.124 |
| 185 | 85.0 | 188.0 | 202.74 | 1397.8 | 13.978 |
| 190 | 87.8 | 201.0 | 215.74 | 1487.5 | 14.875 |
| 195 | 90.6 | 214.7 | 229.37 | 1581.4 | 15.814 |
| 200 | 93.3 | 229.0 | 243.65 | 1679.9 | 16.799 |
| 205 | 96.1 | 243.9 | 258.62 | 1783.1 | 17.831 |
| 210 | 98.9 | 259.6 | 274.29 | 1891.2 | 18.912 |
| 215 | 101.7 | 276.0 | 290.7 | 2004.3 | 20.043 |
| 220 | 104.4 | 293.2 | 307.88 | 2122.8 | 21.228 |
| 225 | 107.2 | 311.2 | 325.86 | 2246.7 | 22.467 |
| 230 | 110.0 | 330.0 | 344.69 | 2376.5 | 23.765 |
| 235 | 112.8 | 349.7 | 364.4 | 2512.4 | 25.124 |
| 240 | 115.6 | 370.4 | 385.05 | 2654.9 | 26.549 |
| 245 | 118.3 | 392.0 | 406.72 | 2804.2 | 28.042 |
| 250 | 121.1 | 414.8 | 429.47 | 2961.1 | 29.611 |
Properties
| ASHRAE Designation | 236fa |
| Safety Classification | A1 (non-flammable, low toxicity) |
| GWP (AR4, 100-yr) | 9810 |
| ODP | 0 |
| Molecular Weight | 152.04 g/mol |
| Boiling Point (1 atm) | 29.3°F / -1.5°C |
| Critical Temperature | 256.9°F / 124.9°C |
| Critical Pressure | 462.8 psia / 31.91 bar |
| Category | HFC |
Common Applications
- Fire suppression
- ORC power cycles
- Chillers