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

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 0.4
-45 -49 0.6
-40 -40 0.8
-35 -31 1.1
-30 -22 1.4
-25 -13 1.8
-20 -4 2.2
-15 5 2.7
-10 14 3.2
-5 23 3.8
0 32 4.5
5 41 5.3
10 50 6.1
15 59 7.1
20 68 8.1
25 77 9.2
30 86 10.5
35 95 11.8
40 104 13.3
45 113 14.9
50 122 16.6
55 131 18.5
60 140 20.5
65 149 22.7
70 158 25.0
75 167 27.5
80 176 30.2