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

bar

* 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 bar
-50 -58 0.9
-45 -49 1.3
-40 -40 1.7
-35 -31 2.2
-30 -22 2.8
-25 -13 3.5
-20 -4 4.3
-15 5 5.2
-10 14 6.2
-5 23 7.4
0 32 8.6
5 41 10.0
10 50 11.6
15 59 13.2
20 68 15.1
25 77 17.1
30 86 19.3
35 95 21.7
40 104 24.3
45 113 27.1
50 122 30.1
55 131 33.3
60 140 36.8
65 149 40.6
70 158 44.6
75 167 48.9