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-1234ze(E)

Pure
GWP: 1
ODP: 0
Safety Class: A2L

Ultra-low GWP HFO refrigerant for commercial refrigeration, chillers, and heat pumps. Lower pressure than R-134a, operates at approximately 25% lower pressure. Mildly flammable (A2L).

A2L Mildly Flammable - Use equipment rated for A2L refrigerants. Follow local safety codes.

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
-50 -58 0.2
-45 -49 0.4
-40 -40 0.5
-35 -31 0.7
-30 -22 1.0
-25 -13 1.3
-20 -4 1.7
-15 5 2.1
-10 14 2.5
-5 23 3.1
0 32 3.7
5 41 4.4
10 50 5.2
15 59 6.0
20 68 7.0
25 77 8.0
30 86 9.2
35 95 10.4
40 104 11.8
45 113 13.3
50 122 15.0
55 131 16.8
60 140 18.7
65 149 20.8
70 158 23.0
75 167 25.4
80 176 28.1