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-1234yf

Pure
GWP: 1
ODP: 0
Safety Class: A2L

Ultra-low GWP HFO refrigerant for automotive air conditioning. Direct replacement for R-134a with similar thermodynamic properties. Mildly flammable (A2L).

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 36.0
-45 -49 56.0
-40 -40 80.0
-35 -31 107.0
-30 -22 139.0
-25 -13 176.0
-20 -4 218.0
-15 5 267.0
-10 14 322.0
-5 23 383.0
0 32 452.0
5 41 528.0
10 50 613.0
15 59 707.0
20 68 810.0
25 77 923.0
30 86 1,047.0
35 95 1,183.0
40 104 1,330.0
45 113 1,490.0
50 122 1,663.0
55 131 1,850.0
60 140 2,052.0
65 149 2,269.0
70 158 2,503.0
75 167 2,754.0
80 176 3,023.0