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

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 89.0
-45 -49 127.0
-40 -40 172.0
-35 -31 224.0
-30 -22 284.0
-25 -13 353.0
-20 -4 432.0
-15 5 522.0
-10 14 623.0
-5 23 736.0
0 32 862.0
5 41 1,001.0
10 50 1,155.0
15 59 1,323.0
20 68 1,508.0
25 77 1,710.0
30 86 1,930.0
35 95 2,169.0
40 104 2,427.0
45 113 2,707.0
50 122 3,009.0
55 131 3,334.0
60 140 3,683.0
65 149 4,058.0
70 158 4,461.0
75 167 4,893.0