Refrigerant · CFC

R-11 pressure-temperature chart and data

Trichlorofluoromethane. Safety class A1, GWP 4,750. Old low-pressure centrifugal chillers. Banned; recovery only. Replaced by R-123.

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R-11 data sheet

Name	Trichlorofluoromethane
Type	CFC
Safety class	A1 — lower toxicity, does not burn
Ozone depletion (ODP)	1
Global warming (GWP, 100 yr)	4,750
Boils at 1 atm	74.7 °F (23.7 °C)
Critical temperature	388.3 °F (197.9 °C)
Temperature glide	none / very small
Low side at 5 °F evaporating	V 24.0 psig (-81 kPa)
High side at 86 °F condensing	3.6 psig (25 kPa)
Old cylinder colour	Orange
Oil	Mineral / AB
Used for	Old low-pressure centrifugal chillers. Banned; recovery only. Replaced by R-123.

Ozone-depleting: venting is illegal. Recover it and send it to a licensed reclaimer.

Pressures are saturation values from reference equations of state. Real pressures change with load and airflow. GWP is the IPCC AR4 100-year value (blends calculated from their ingredients). Cylinder colours were an old AHRI code; since 2020 new cylinders are all one colour with the name on the label, so always read the label, never go by colour.

R-11 pressure / temperature chart

°F	°C	psig	kPa
-50	-45.6	V 28.9	-98
-49	-45.0	V 28.8	-98
-48	-44.4	V 28.8	-97
-47	-43.9	V 28.7	-97
-46	-43.3	V 28.7	-97
-45	-42.8	V 28.7	-97
-44	-42.2	V 28.6	-97
-43	-41.7	V 28.6	-97
-42	-41.1	V 28.5	-97
-41	-40.6	V 28.5	-96
-40	-40.0	V 28.4	-96
-39	-39.4	V 28.4	-96
-38	-38.9	V 28.3	-96
-37	-38.3	V 28.3	-96
-36	-37.8	V 28.2	-95
-35	-37.2	V 28.1	-95
-34	-36.7	V 28.1	-95
-33	-36.1	V 28.0	-95
-32	-35.6	V 28.0	-95
-31	-35.0	V 27.9	-94
-30	-34.4	V 27.8	-94
-29	-33.9	V 27.8	-94
-28	-33.3	V 27.7	-94
-27	-32.8	V 27.6	-93
-26	-32.2	V 27.5	-93
-25	-31.7	V 27.4	-93
-24	-31.1	V 27.4	-93
-23	-30.6	V 27.3	-92
-22	-30.0	V 27.2	-92
-21	-29.4	V 27.1	-92
-20	-28.9	V 27.0	-92
-19	-28.3	V 26.9	-91
-18	-27.8	V 26.9	-91
-17	-27.2	V 26.8	-91
-16	-26.7	V 26.7	-90
-15	-26.1	V 26.5	-90
-14	-25.6	V 26.4	-90
-13	-25.0	V 26.3	-89
-12	-24.4	V 26.2	-89
-11	-23.9	V 26.1	-88
-10	-23.3	V 26.0	-88
-9	-22.8	V 25.9	-88
-8	-22.2	V 25.8	-87
-7	-21.7	V 25.7	-87
-6	-21.1	V 25.5	-86
-5	-20.6	V 25.4	-86
-4	-20.0	V 25.3	-86
-3	-19.4	V 25.1	-85
-2	-18.9	V 25.0	-85
-1	-18.3	V 24.9	-84
0	-17.8	V 24.7	-84
1	-17.2	V 24.6	-83
2	-16.7	V 24.4	-83
3	-16.1	V 24.3	-82
4	-15.6	V 24.1	-82
5	-15.0	V 24.0	-81
6	-14.4	V 23.8	-81
7	-13.9	V 23.6	-80
8	-13.3	V 23.5	-79
9	-12.8	V 23.3	-79
10	-12.2	V 23.1	-78
11	-11.7	V 22.9	-78
12	-11.1	V 22.7	-77
13	-10.6	V 22.5	-76
14	-10.0	V 22.3	-76
15	-9.4	V 22.1	-75
16	-8.9	V 21.9	-74
17	-8.3	V 21.7	-74
18	-7.8	V 21.5	-73
19	-7.2	V 21.3	-72
20	-6.7	V 21.1	-71
21	-6.1	V 20.8	-71
22	-5.6	V 20.6	-70
23	-5.0	V 20.4	-69
24	-4.4	V 20.2	-68
25	-3.9	V 19.9	-67
26	-3.3	V 19.6	-67
27	-2.8	V 19.4	-66
28	-2.2	V 19.1	-65
29	-1.7	V 18.9	-64
30	-1.1	V 18.6	-63
31	-0.6	V 18.3	-62
32	0.0	V 18.1	-61
33	0.6	V 17.8	-60
34	1.1	V 17.5	-59
35	1.7	V 17.2	-58
36	2.2	V 16.9	-57
37	2.8	V 16.6	-56
38	3.3	V 16.2	-55
39	3.9	V 15.9	-54
40	4.4	V 15.6	-53
41	5.0	V 15.3	-52
42	5.6	V 14.9	-51
43	6.1	V 14.6	-49
44	6.7	V 14.3	-48
45	7.2	V 13.9	-47
46	7.8	V 13.5	-46
47	8.3	V 13.2	-45
48	8.9	V 12.8	-43
49	9.4	V 12.4	-42
50	10.0	V 12.0	-41
51	10.6	V 11.6	-39
52	11.1	V 11.2	-38
53	11.7	V 10.8	-37
54	12.2	V 10.4	-35
55	12.8	V 10.0	-34
56	13.3	V 9.5	-32
57	13.9	V 9.1	-31
58	14.4	V 8.6	-29
59	15.0	V 8.2	-28
60	15.6	V 7.7	-26
61	16.1	V 7.2	-25
62	16.7	V 6.8	-23
63	17.2	V 6.3	-21
64	17.8	V 5.8	-20
65	18.3	V 5.3	-18
66	18.9	V 4.8	-16
67	19.4	V 4.3	-14
68	20.0	V 3.7	-13
69	20.6	V 3.2	-11
70	21.1	V 2.6	-9
71	21.7	V 2.1	-7
72	22.2	V 1.5	-5
73	22.8	V 1.0	-3
74	23.3	V 0.4	-1
75	23.9	0.1	1
76	24.4	0.4	3
77	25.0	0.7	5
78	25.6	1.0	7
79	26.1	1.3	9
80	26.7	1.6	11
81	27.2	1.9	13
82	27.8	2.2	15
83	28.3	2.6	18
84	28.9	2.9	20
85	29.4	3.2	22
86	30.0	3.6	25
87	30.6	3.9	27
88	31.1	4.3	29
89	31.7	4.6	32
90	32.2	5.0	34
91	32.8	5.3	37
92	33.3	5.7	39
93	33.9	6.1	42
94	34.4	6.5	45
95	35.0	6.9	47
96	35.6	7.3	50
97	36.1	7.7	53
98	36.7	8.1	56
99	37.2	8.5	58
100	37.8	8.9	61
101	38.3	9.3	64
102	38.9	9.7	67
103	39.4	10.2	70
104	40.0	10.6	73
105	40.6	11.1	76
106	41.1	11.5	79
107	41.7	11.9	82
108	42.2	12.4	86
109	42.8	12.9	89
110	43.3	13.4	92
111	43.9	13.8	95
112	44.4	14.3	99
113	45.0	14.8	102
114	45.6	15.3	106
115	46.1	15.8	109
116	46.7	16.3	113
117	47.2	16.9	116
118	47.8	17.4	120
119	48.3	17.9	123
120	48.9	18.4	127
121	49.4	19.0	131
122	50.0	19.6	135
123	50.6	20.1	139
124	51.1	20.7	143
125	51.7	21.3	147
126	52.2	21.8	151
127	52.8	22.4	155
128	53.3	23.0	159
129	53.9	23.6	163
130	54.4	24.2	167

V = vacuum in inches of mercury. Saturation pressure in psig at sea level, calculated from reference equations of state. The chart gives the boiling temperature at that pressure, not the pipe temperature. Air in the system adds pressure and throws it off.

R-11 pressure in psig, psia, kPa and bar

°F	°C	psig	psia	kPa gauge	kPa absolute	bar absolute
-50	-45.6	V 28.9	0.5	-98	4	0.04
-45	-42.8	V 28.7	0.6	-97	4	0.04
-40	-40.0	V 28.4	0.7	-96	5	0.05
-35	-37.2	V 28.1	0.9	-95	6	0.06
-30	-34.4	V 27.8	1.0	-94	7	0.07
-25	-31.7	V 27.4	1.2	-93	8	0.08
-20	-28.9	V 27.0	1.4	-92	10	0.10
-15	-26.1	V 26.5	1.7	-90	11	0.11
-10	-23.3	V 26.0	1.9	-88	13	0.13
-5	-20.6	V 25.4	2.2	-86	15	0.15
0	-17.8	V 24.7	2.6	-84	18	0.18
5	-15.0	V 24.0	2.9	-81	20	0.20
10	-12.2	V 23.1	3.4	-78	23	0.23
15	-9.4	V 22.1	3.8	-75	26	0.26
20	-6.7	V 21.1	4.3	-71	30	0.30
25	-3.9	V 19.9	4.9	-67	34	0.34
30	-1.1	V 18.6	5.6	-63	38	0.38
35	1.7	V 17.2	6.3	-58	43	0.43
40	4.4	V 15.6	7.0	-53	48	0.48
45	7.2	V 13.9	7.9	-47	54	0.54
50	10.0	V 12.0	8.8	-41	61	0.61
55	12.8	V 10.0	9.8	-34	68	0.68
60	15.6	V 7.7	10.9	-26	75	0.75
65	18.3	V 5.3	12.1	-18	83	0.83
70	21.1	V 2.6	13.4	-9	92	0.92
75	23.9	0.1	14.8	1	102	1.02
80	26.7	1.6	16.3	11	112	1.12
85	29.4	3.2	17.9	22	124	1.24
90	32.2	5.0	19.7	34	136	1.36
95	35.0	6.9	21.6	47	149	1.49
100	37.8	8.9	23.6	61	163	1.63
105	40.6	11.1	25.7	76	178	1.78
110	43.3	13.4	28.1	92	193	1.93
115	46.1	15.8	30.5	109	210	2.10
120	48.9	18.4	33.1	127	229	2.29
125	51.7	21.3	35.9	147	248	2.48
130	54.4	24.2	38.9	167	268	2.68

V = vacuum in inches of mercury. Absolute pressure = gauge + 14.7 psi at sea level; use absolute pressure for gas-law work. For blends the dew column is the vapour (suction) side and the bubble column the liquid side.

Other refrigerants

R-12 R-22 R-23 R-32 R-123 R-125 R-134a R-143a R-152a R-170 R-245fa R-290 R-401A R-401B R-404A R-407A R-407C R-407F R-408A R-409A R-410A R-417A R-422A R-422D R-427A R-448A R-449A R-450A R-452A R-452B R-454A R-454B R-454C R-455A R-500 R-502 R-507A R-508B R-513A R-600 R-600a R-717 R-744 R-1233zd(E) R-1234yf R-1234ze(E) R-1270

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Calculation aids and reference figures for licensed technicians. Always follow the manufacturer’s data plate and manual for the exact model, and local codes. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Pressures are typical saturation values and change with load and airflow.