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

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
-40 -40 0.5
-35 -31 0.7
-30 -22 0.8
-26 -15 1.0
-25 -13 1.1
-20 -4 1.3
-15 5 1.6
-10 14 2.0
-5 23 2.4
0 32 2.9
5 41 3.5
10 50 4.2
15 59 4.9
20 68 5.7
25 77 6.7
30 86 7.7
35 95 8.9
40 104 10.2
45 113 11.6
50 122 13.2
55 131 14.9
60 140 16.8
65 149 18.9
70 158 21.2
75 167 23.7
80 176 26.4
85 185 29.4
90 194 32.7
95 203 36.3