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

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
-50 -58 -9.5
-45 -49 -6.5
-40 -40 -3.1
-35 -31 0.8
-30 -22 5.4
-25 -13 10.8
-20 -4 17.0
-15 5 24.0
-10 14 32.0
-5 23 40.9
0 32 50.9
5 41 62.0
10 50 74.3
15 59 87.9
20 68 102.9
25 77 119.3
30 86 137.3
35 95 156.9
40 104 178.2
45 113 201.4
50 122 226.5
55 131 253.6
60 140 282.9
65 149 314.4
70 158 348.3
75 167 384.7
80 176 423.7