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

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 -11.7
-45 -49 -9.5
-40 -40 -7.5
-35 -31 -4.4
-30 -22 -0.7
-25 -13 3.7
-20 -4 8.8
-15 5 14.7
-10 14 21.5
-5 23 29.2
0 32 37.9
5 41 47.7
10 50 58.7
15 59 70.9
20 68 84.5
25 77 99.4
30 86 115.8
35 95 133.9
40 104 153.6
45 113 175.1
50 122 198.4
55 131 223.7
60 140 251.1
65 149 280.7
70 158 312.7
75 167 347.1
80 176 384.2