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

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 21.0
-45 -49 36.0
-40 -40 50.0
-35 -31 71.0
-30 -22 96.0
-25 -13 126.0
-20 -4 162.0
-15 5 202.0
-10 14 249.0
-5 23 302.0
0 32 362.0
5 41 430.0
10 50 506.0
15 59 590.0
20 68 683.0
25 77 786.0
30 86 899.0
35 95 1,024.0
40 104 1,160.0
45 113 1,308.0
50 122 1,469.0
55 131 1,643.0
60 140 1,832.0
65 149 2,036.0
70 158 2,256.0
75 167 2,494.0
80 176 2,750.0