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

kgf/cm²

* 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 kgf/cm²
-50 -58 0.9
-45 -49 1.3
-40 -40 1.8
-35 -31 2.3
-30 -22 2.9
-25 -13 3.6
-20 -4 4.4
-15 5 5.3
-10 14 6.4
-5 23 7.5
0 32 8.8
5 41 10.2
10 50 11.8
15 59 13.5
20 68 15.4
25 77 17.4
30 86 19.7
35 95 22.1
40 104 24.8
45 113 27.6
50 122 30.7
55 131 34.0
60 140 37.6
65 149 41.4
70 158 45.5
75 167 49.9