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

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
-40 -40 0.5
-35 -31 0.7
-30 -22 0.9
-26 -15 1.0
-25 -13 1.1
-20 -4 1.4
-15 5 1.7
-10 14 2.1
-5 23 2.5
0 32 3.0
5 41 3.6
10 50 4.2
15 59 5.0
20 68 5.8
25 77 6.8
30 86 7.9
35 95 9.0
40 104 10.4
45 113 11.8
50 122 13.4
55 131 15.2
60 140 17.2
65 149 19.3
70 158 21.6
75 167 24.2
80 176 27.0
85 185 30.0
90 194 33.3
95 203 37.0