R-22 PT chart

R-22 is an HCFC that is no longer produced or imported in the U.S. for servicing; existing systems are serviced with recovered or reclaimed refrigerant. It is a single-component refrigerant with one saturation pressure at each temperature.

Gauge pressures at sea level (14.696 psia). At altitude a gauge reads higher for the same temperature — use the PT calculator with your elevation. Generated with CoolProp 8.0.0 on 2026-10-25; how it was checked.

R-22 saturation pressure by temperature, gauge pressure at sea level
°F	°C	psig	kPa gauge
−40	−40.0	0.6	4
−39	−39.4	1.0	7
−38	−38.9	1.4	9
−37	−38.3	1.8	12
−36	−37.8	2.2	15
−35	−37.2	2.6	18
−34	−36.7	3.1	21
−33	−36.1	3.5	24
−32	−35.6	4.0	27
−31	−35.0	4.5	31
−30	−34.4	4.9	34
−29	−33.9	5.4	37
−28	−33.3	5.9	41
−27	−32.8	6.4	44
−26	−32.2	6.9	48
−25	−31.7	7.4	51
−24	−31.1	8.0	55
−23	−30.6	8.5	59
−22	−30.0	9.1	63
−21	−29.4	9.6	66
−20	−28.9	10.2	70
−19	−28.3	10.8	74
−18	−27.8	11.4	79
−17	−27.2	12.0	83
−16	−26.7	12.6	87
−15	−26.1	13.2	91
−14	−25.6	13.9	96
−13	−25.0	14.5	100
−12	−24.4	15.2	105
−11	−23.9	15.9	109
−10	−23.3	16.5	114
−9	−22.8	17.2	119
−8	−22.2	17.9	124
−7	−21.7	18.7	129
−6	−21.1	19.4	134
−5	−20.6	20.1	139
−4	−20.0	20.9	144
−3	−19.4	21.7	149
−2	−18.9	22.4	155
−1	−18.3	23.2	160
0	−17.8	24.0	166
1	−17.2	24.9	171
2	−16.7	25.7	177
3	−16.1	26.5	183
4	−15.6	27.4	189
5	−15.0	28.3	195
6	−14.4	29.2	201
7	−13.9	30.1	207
8	−13.3	31.0	214
9	−12.8	31.9	220
10	−12.2	32.8	226
11	−11.7	33.8	233
12	−11.1	34.8	240
13	−10.6	35.8	247
14	−10.0	36.8	253
15	−9.4	37.8	260
16	−8.9	38.8	268
17	−8.3	39.9	275
18	−7.8	40.9	282
19	−7.2	42.0	290
20	−6.7	43.1	297
21	−6.1	44.2	305
22	−5.6	45.3	313
23	−5.0	46.5	320
24	−4.4	47.6	328
25	−3.9	48.8	337
26	−3.3	50.0	345
27	−2.8	51.2	353
28	−2.2	52.4	362
29	−1.7	53.7	370
30	−1.1	55.0	379
31	−0.6	56.2	388
32	0.0	57.5	397
33	0.6	58.8	406
34	1.1	60.2	415
35	1.7	61.5	424
36	2.2	62.9	434
37	2.8	64.3	443
38	3.3	65.7	453
39	3.9	67.1	463
40	4.4	68.6	473
41	5.0	70.0	483
42	5.6	71.5	493
43	6.1	73.0	503
44	6.7	74.5	514
45	7.2	76.1	524
46	7.8	77.6	535
47	8.3	79.2	546
48	8.9	80.8	557
49	9.4	82.4	568
50	10.0	84.1	580
51	10.6	85.7	591
52	11.1	87.4	603
53	11.7	89.1	614
54	12.2	90.8	626
55	12.8	92.6	638
56	13.3	94.4	651
57	13.9	96.1	663
58	14.4	98.0	675
59	15.0	99.8	688
60	15.6	101.6	701
61	16.1	103.5	714
62	16.7	105.4	727
63	17.2	107.3	740
64	17.8	109.3	753
65	18.3	111.2	767
66	18.9	113.2	781
67	19.4	115.3	795
68	20.0	117.3	809
69	20.6	119.4	823
70	21.1	121.4	837
71	21.7	123.5	852
72	22.2	125.7	867
73	22.8	127.8	881
74	23.3	130.0	896
75	23.9	132.2	912
76	24.4	134.5	927
77	25.0	136.7	943
78	25.6	139.0	958
79	26.1	141.3	974
80	26.7	143.6	990
81	27.2	146.0	1007
82	27.8	148.4	1023
83	28.3	150.8	1040
84	28.9	153.2	1056
85	29.4	155.7	1073
86	30.0	158.2	1091
87	30.6	160.7	1108
88	31.1	163.2	1125
89	31.7	165.8	1143
90	32.2	168.4	1161
91	32.8	171.0	1179
92	33.3	173.7	1197
93	33.9	176.4	1216
94	34.4	179.1	1235
95	35.0	181.8	1253
96	35.6	184.6	1273
97	36.1	187.4	1292
98	36.7	190.2	1311
99	37.2	193.0	1331
100	37.8	195.9	1351
101	38.3	198.8	1371
102	38.9	201.8	1391
103	39.4	204.7	1412
104	40.0	207.7	1432
105	40.6	210.8	1453
106	41.1	213.8	1474
107	41.7	216.9	1496
108	42.2	220.0	1517
109	42.8	223.2	1539
110	43.3	226.4	1561
111	43.9	229.6	1583
112	44.4	232.8	1605
113	45.0	236.1	1628
114	45.6	239.4	1651
115	46.1	242.8	1674
116	46.7	246.1	1697
117	47.2	249.5	1720
118	47.8	253.0	1744
119	48.3	256.4	1768
120	48.9	260.0	1792
121	49.4	263.5	1817
122	50.0	267.1	1841
123	50.6	270.7	1866
124	51.1	274.3	1891
125	51.7	278.0	1917
126	52.2	281.7	1942
127	52.8	285.4	1968
128	53.3	289.2	1994
129	53.9	293.0	2020
130	54.4	296.9	2047
131	55.0	300.8	2074
132	55.6	304.7	2101
133	56.1	308.7	2128
134	56.7	312.6	2156
135	57.2	316.7	2183
136	57.8	320.7	2211
137	58.3	324.8	2240
138	58.9	329.0	2268
139	59.4	333.2	2297
140	60.0	337.4	2326
141	60.6	341.6	2355
142	61.1	345.9	2385
143	61.7	350.3	2415
144	62.2	354.6	2445
145	62.8	359.0	2475
146	63.3	363.5	2506
147	63.9	368.0	2537
148	64.4	372.5	2568
149	65.0	377.1	2600
150	65.6	381.7	2632

Reading the chart

Each row is the pressure at which R-22 boils or condenses at that temperature. A negative gauge pressure is a vacuum.
R-22 is a single-component refrigerant, so liquid and vapor saturate at the same pressure.
To work out superheat or subcooling from your readings, use the Superheat and Subcooling Calculator.
Charge equipment to the manufacturer’s procedure and targets. Only certified technicians may handle refrigerant.