HVAC Toolkit

Pressure-Temperature Charts

Saturation P-T data for common refrigerants

Select Refrigerant

HFC / HCFC

R-22 R-32 R-125 R-134a R-143a R-404A Z R-407C Z R-410A R-507A

Low GWP (HFO)

R-449A Z R-454B Z Low GWP R-513A R-1234yf Low GWP R-1234ze(E) Low GWP

Natural

R-290 (Propane) Low GWP R-600a (Isobutane) Low GWP R-744 (CO2) Low GWP R-717 (NH3) Low GWP

Pressure Unit

psig kPa bar kgf/cm²

R-717 (Ammonia)

Pure
GWP: 0
ODP: 0
Safety Class: B2L

Natural refrigerant with zero GWP. Excellent thermodynamic properties and high efficiency. Toxic and mildly flammable (B2L). Primarily used in industrial applications with proper safety measures. Strong odor provides self-warning for leaks.

Quick P-T Lookup

kPa

* Results are interpolated from the P-T table data

Pressure Units: psig = Gauge pressure (relative to atmosphere) kPa / bar / kgf/cm² = Absolute pressure

°C °F kPa
-50 -58 41.0
-45 -49 55.0
-40 -40 72.0
-35 -31 93.0
-30 -22 120.0
-25 -13 152.0
-20 -4 190.0
-15 5 236.0
-10 14 291.0
-5 23 355.0
0 32 429.0
5 41 516.0
10 50 615.0
15 59 728.0
20 68 857.0
25 77 1,003.0
30 86 1,167.0
35 95 1,350.0
40 104 1,554.0
45 113 1,782.0
50 122 2,034.0
55 131 2,313.0
60 140 2,620.0
65 149 2,958.0
70 158 3,328.0