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-32

Pure
GWP: 675
ODP: 0
Safety Class: A2L

Mildly flammable. Lower GWP alternative to R-410A. Higher volumetric capacity.

A2L Mildly Flammable - Use equipment rated for A2L refrigerants. Follow local safety codes.

Quick P-T Lookup

psig

* 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 psig
-50 -58 -1.8
-45 -49 3.8
-40 -40 10.3
-35 -31 17.8
-30 -22 26.6
-25 -13 36.6
-20 -4 48.1
-15 5 61.1
-10 14 75.7
-5 23 92.1
0 32 110.3
5 41 130.5
10 50 152.8
15 59 177.3
20 68 204.1
25 77 233.4
30 86 265.3
35 95 300.0
40 104 337.5
45 113 378.1
50 122 421.8
55 131 468.9
60 140 519.5
65 149 573.9
70 158 632.3
75 167 695.0