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-134a

Pure
GWP: 1,430
ODP: 0
Safety Class: A1

Common automotive and commercial refrigerant. Being phased out in automotive (EU) for R-1234yf due to GWP.

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
-40 -40 -7.2
-35 -31 -4.1
-30 -22 -0.5
-26 -15 2.4
-25 -13 3.2
-20 -4 7.4
-15 5 12.0
-10 14 17.1
-5 23 22.8
0 32 29.1
5 41 36.0
10 50 43.6
15 59 52.0
20 68 61.3
25 77 71.4
30 86 82.5
35 95 94.7
40 104 108.0
45 113 122.6
50 122 138.5
55 131 155.9
60 140 174.8
65 149 195.4
70 158 217.8
75 167 242.2
80 176 268.6
85 185 297.3
90 194 328.4
95 203 362.2