R134a pressure–temperature chart

R134a (Tetrafluoroethane)

A1GWP (AR4) 1430

Pressures are gauge, in bar (g): bar (a) minus 1.01325 bar.

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°C	Saturation pressure bar (g)
-40	-0.50
-39	-0.47
-38	-0.45
-37	-0.42
-36	-0.38
-35	-0.35
-34	-0.32
-33	-0.28
-32	-0.25
-31	-0.21
-30	-0.17
-29	-0.13
-28	-0.09
-27	-0.04
-26	0.00
-25	0.05
-24	0.10
-23	0.15
-22	0.20
-21	0.26
-20	0.31
-19	0.37
-18	0.43
-17	0.50
-16	0.56
-15	0.63
-14	0.69
-13	0.77
-12	0.84
-11	0.91
-10	0.99
-9	1.07
-8	1.16
-7	1.24
-6	1.33
-5	1.42
-4	1.51
-3	1.61
-2	1.71
-1	1.81
0	1.91
1	2.02
2	2.13
3	2.25
4	2.36
5	2.48
6	2.61
7	2.73
8	2.86
9	3.00
10	3.13
11	3.27
12	3.42
13	3.56
14	3.72
15	3.87
16	4.03
17	4.19
18	4.36
19	4.53
20	4.70
21	4.88
22	5.07
23	5.25
24	5.44
25	5.64
26	5.84
27	6.05
28	6.26
29	6.47
30	6.69
31	6.91
32	7.14
33	7.37
34	7.61
35	7.86
36	8.11
37	8.36
38	8.62
39	8.88
40	9.15
41	9.43
42	9.71
43	10.00
44	10.29
45	10.59
46	10.89
47	11.20
48	11.52
49	11.84
50	12.17
51	12.50
52	12.84
53	13.19
54	13.54
55	13.90
56	14.27
57	14.64
58	15.02
59	15.41
60	15.80
61	16.21
62	16.61
63	17.03
64	17.45
65	17.88
66	18.32
67	18.77
68	19.22
69	19.69
70	20.16
71	20.63
72	21.12
73	21.61
74	22.12
75	22.63
76	23.15
77	23.68
78	24.22
79	24.76
80	25.32
81	25.88
82	26.46
83	27.05
84	27.64
85	28.25
86	28.86
87	29.49
88	30.12
89	30.77
90	31.43
91	32.10
92	32.78
93	33.47
94	34.18
95	34.90
96	35.63

Saturation data derived from reference equations of state. Always cross-check against calibrated gauges.