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

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 0.2
-45 -49 0.4
-40 -40 0.5
-35 -31 0.7
-30 -22 1.0
-25 -13 1.3
-20 -4 1.6
-15 5 2.0
-10 14 2.5
-5 23 3.0
0 32 3.6
5 41 4.3
10 50 5.1
15 59 5.9
20 68 6.8
25 77 7.9
30 86 9.0
35 95 10.2
40 104 11.6
45 113 13.1
50 122 14.7
55 131 16.4
60 140 18.3
65 149 20.4
70 158 22.6
75 167 24.9
80 176 27.5