R-123 PT Chart

R-123 saturation pressure, −40 to 150 °F−40 to 65 °C. Used in low-pressure centrifugal chillers (legacy).

Safety class B1Single component (HCFC)No glideNo glide

R-123 (HCFC-123) is an HCFC. Since 1 January 2020, newly produced or imported R-123 may only be used as a refrigerant in equipment made before that date, and US production and import of all HCFCs end on 1 January 2030 (limited exemptions). R-123 runs below atmospheric pressure at normal chiller evaporator temperatures: the table shows 18.2 inHg vacuum at 40 °F, and 0 psig is not reached until about 83 °F. Source: US EPA: Phaseout of Class II Ozone-Depleting Substances; 40 CFR 82.16 (HCFC phaseout schedule).

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Step 3 Temperature

°F°C

Type a temperature to see the saturation pressure.

R-123 pressure temperature table

Below 0 psig: inches of mercury vacuum. Highlighted: 40 °F and 100 °F.Negative kPa = vacuum. Highlighted: 4 °C and 38 °C.

R-123 saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Pressure psig
-40	28.9 inHg
-39	28.8 inHg
-38	28.8 inHg
-37	28.7 inHg
-36	28.7 inHg
-35	28.7 inHg
-34	28.6 inHg
-33	28.6 inHg
-32	28.5 inHg
-31	28.5 inHg
-30	28.4 inHg
-29	28.4 inHg
-28	28.3 inHg
-27	28.2 inHg
-26	28.2 inHg
-25	28.1 inHg
-24	28.1 inHg
-23	28.0 inHg
-22	27.9 inHg
-21	27.9 inHg
-20	27.8 inHg
-19	27.7 inHg
-18	27.6 inHg
-17	27.6 inHg
-16	27.5 inHg
-15	27.4 inHg
-14	27.3 inHg
-13	27.2 inHg
-12	27.2 inHg
-11	27.1 inHg
-10	27.0 inHg
-9	26.9 inHg
-8	26.8 inHg
-7	26.7 inHg
-6	26.6 inHg
-5	26.5 inHg
-4	26.4 inHg
-3	26.3 inHg
-2	26.2 inHg
-1	26.0 inHg
0	25.9 inHg
1	25.8 inHg
2	25.7 inHg
3	25.6 inHg
4	25.4 inHg
5	25.3 inHg
6	25.2 inHg
7	25.0 inHg
8	24.9 inHg
9	24.7 inHg
10	24.6 inHg
11	24.4 inHg
12	24.3 inHg
13	24.1 inHg
14	23.9 inHg
15	23.8 inHg
16	23.6 inHg
17	23.4 inHg
18	23.2 inHg
19	23.1 inHg
20	22.9 inHg
21	22.7 inHg
22	22.5 inHg
23	22.3 inHg
24	22.1 inHg
25	21.9 inHg
26	21.7 inHg
27	21.4 inHg
28	21.2 inHg
29	21.0 inHg
30	20.8 inHg
31	20.5 inHg
32	20.3 inHg
33	20.0 inHg
34	19.8 inHg
35	19.5 inHg
36	19.3 inHg
37	19.0 inHg
38	18.7 inHg
39	18.4 inHg
40	18.2 inHg
41	17.9 inHg
42	17.6 inHg
43	17.3 inHg
44	17.0 inHg
45	16.6 inHg
46	16.3 inHg
47	16.0 inHg
48	15.7 inHg
49	15.3 inHg
50	15.0 inHg
51	14.6 inHg
52	14.3 inHg
53	13.9 inHg
54	13.5 inHg
55	13.2 inHg
56	12.8 inHg
57	12.4 inHg
58	12.0 inHg
59	11.6 inHg
60	11.2 inHg
61	10.8 inHg
62	10.3 inHg
63	9.9 inHg
64	9.4 inHg
65	9.0 inHg
66	8.5 inHg
67	8.1 inHg
68	7.6 inHg
69	7.1 inHg
70	6.6 inHg
71	6.1 inHg
72	5.6 inHg
73	5.1 inHg
74	4.6 inHg
75	4.0 inHg
76	3.5 inHg
77	2.9 inHg
78	2.4 inHg
79	1.8 inHg
80	1.2 inHg
81	0.6 inHg
82	0.0
83	0.3
84	0.6
85	0.9
86	1.2
87	1.5
88	1.8
89	2.2
90	2.5
91	2.8
92	3.2
93	3.5
94	3.9
95	4.2
96	4.6
97	5.0
98	5.3
99	5.7
100	6.1
101	6.5
102	6.9
103	7.3
104	7.7
105	8.1
106	8.5
107	9.0
108	9.4
109	9.8
110	10.3
111	10.7
112	11.2
113	11.7
114	12.1
115	12.6
116	13.1
117	13.6
118	14.1
119	14.6
120	15.1
121	15.6
122	16.1
123	16.6
124	17.2
125	17.7
126	18.3
127	18.8
128	19.4
129	20.0
130	20.6
131	21.1
132	21.7
133	22.3
134	22.9
135	23.6
136	24.2
137	24.8
138	25.5
139	26.1
140	26.8
141	27.4
142	28.1
143	28.8
144	29.5
145	30.2
146	30.9
147	31.6
148	32.3
149	33.0
150	33.8

R-123 saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Pressure kPa
-40	-97.7
-39	-97.5
-38	-97.2
-37	-97.0
-36	-96.7
-35	-96.4
-34	-96.1
-33	-95.7
-32	-95.4
-31	-95.0
-30	-94.6
-29	-94.2
-28	-93.7
-27	-93.3
-26	-92.8
-25	-92.3
-24	-91.7
-23	-91.2
-22	-90.6
-21	-90.0
-20	-89.3
-19	-88.7
-18	-88.0
-17	-87.2
-16	-86.4
-15	-85.6
-14	-84.8
-13	-83.9
-12	-83.0
-11	-82.1
-10	-81.1
-9	-80.0
-8	-79.0
-7	-77.9
-6	-76.7
-5	-75.5
-4	-74.2
-3	-72.9
-2	-71.6
-1	-70.1
0	-68.7
1	-67.2
2	-65.6
3	-64.0
4	-62.3
5	-60.5
6	-58.7
7	-56.8
8	-54.9
9	-52.8
10	-50.8
11	-48.6
12	-46.4
13	-44.1
14	-41.7
15	-39.2
16	-36.7
17	-34.1
18	-31.4
19	-28.6
20	-25.7
21	-22.8
22	-19.7
23	-16.5
24	-13.3
25	-10.0
26	-6.5
27	-3.0
28	0.7
29	4.4
30	8.3
31	12.2
32	16.3
33	20.5
34	24.8
35	29.2
36	33.7
37	38.4
38	43.2
39	48.1
40	53.1
41	58.3
42	63.6
43	69.1
44	74.6
45	80.4
46	86.2
47	92.2
48	98.4
49	104.7
50	111.1
51	117.7
52	124.5
53	131.4
54	138.5
55	145.8
56	153.2
57	160.8
58	168.5
59	176.5
60	184.6
61	192.8
62	201.3
63	210.0
64	218.8
65	227.8

Back to the lookup ↑

R-123 PT Chart

°F / psig · Safety class B1 · Single component (HCFC)

refrigerantptchart.com

°F	psig
-40	28.9"
-39	28.8"
-38	28.8"
-37	28.7"
-36	28.7"
-35	28.7"
-34	28.6"
-33	28.6"
-32	28.5"
-31	28.5"
-30	28.4"
-29	28.4"
-28	28.3"
-27	28.2"
-26	28.2"
-25	28.1"
-24	28.1"
-23	28.0"
-22	27.9"
-21	27.9"
-20	27.8"
-19	27.7"
-18	27.6"
-17	27.6"
-16	27.5"
-15	27.4"
-14	27.3"
-13	27.2"
-12	27.2"
-11	27.1"
-10	27.0"
-9	26.9"
-8	26.8"
-7	26.7"
-6	26.6"
-5	26.5"
-4	26.4"
-3	26.3"
-2	26.2"
-1	26.0"
0	25.9"
1	25.8"
2	25.7"
3	25.6"
4	25.4"
5	25.3"
6	25.2"
7	25.0"

°F	psig
8	24.9"
9	24.7"
10	24.6"
11	24.4"
12	24.3"
13	24.1"
14	23.9"
15	23.8"
16	23.6"
17	23.4"
18	23.2"
19	23.1"
20	22.9"
21	22.7"
22	22.5"
23	22.3"
24	22.1"
25	21.9"
26	21.7"
27	21.4"
28	21.2"
29	21.0"
30	20.8"
31	20.5"
32	20.3"
33	20.0"
34	19.8"
35	19.5"
36	19.3"
37	19.0"
38	18.7"
39	18.4"
40	18.2"
41	17.9"
42	17.6"
43	17.3"
44	17.0"
45	16.6"
46	16.3"
47	16.0"
48	15.7"
49	15.3"
50	15.0"
51	14.6"
52	14.3"
53	13.9"
54	13.5"
55	13.2"

°F	psig
56	12.8"
57	12.4"
58	12.0"
59	11.6"
60	11.2"
61	10.8"
62	10.3"
63	9.9"
64	9.4"
65	9.0"
66	8.5"
67	8.1"
68	7.6"
69	7.1"
70	6.6"
71	6.1"
72	5.6"
73	5.1"
74	4.6"
75	4.0"
76	3.5"
77	2.9"
78	2.4"
79	1.8"
80	1.2"
81	0.6"
82	0.0
83	0.3
84	0.6
85	0.9
86	1.2
87	1.5
88	1.8
89	2.2
90	2.5
91	2.8
92	3.2
93	3.5
94	3.9
95	4.2
96	4.6
97	5.0
98	5.3
99	5.7
100	6.1
101	6.5
102	6.9
103	7.3

°F	psig
104	7.7
105	8.1
106	8.5
107	9.0
108	9.4
109	9.8
110	10.3
111	10.7
112	11.2
113	11.7
114	12.1
115	12.6
116	13.1
117	13.6
118	14.1
119	14.6
120	15.1
121	15.6
122	16.1
123	16.6
124	17.2
125	17.7
126	18.3
127	18.8
128	19.4
129	20.0
130	20.6
131	21.1
132	21.7
133	22.3
134	22.9
135	23.6
136	24.2
137	24.8
138	25.5
139	26.1
140	26.8
141	27.4
142	28.1
143	28.8
144	29.5
145	30.2
146	30.9
147	31.6
148	32.3
149	33.0
150	33.8

Italic " = inches of mercury vacuum. Bold rows: 40 °F and 100 °F. Reference only: always verify with the manufacturer’s data and your gauges.

R-123 PT Chart

°C / kPa (gauge) · Safety class B1 · Single component (HCFC)

refrigerantptchart.com

°C	kPa
-40	-97.7
-39	-97.5
-38	-97.2
-37	-97.0
-36	-96.7
-35	-96.4
-34	-96.1
-33	-95.7
-32	-95.4
-31	-95.0
-30	-94.6
-29	-94.2
-28	-93.7
-27	-93.3
-26	-92.8
-25	-92.3
-24	-91.7
-23	-91.2
-22	-90.6
-21	-90.0
-20	-89.3
-19	-88.7
-18	-88.0
-17	-87.2
-16	-86.4
-15	-85.6
-14	-84.8
-13	-83.9
-12	-83.0
-11	-82.1
-10	-81.1
-9	-80.0
-8	-79.0
-7	-77.9
-6	-76.7
-5	-75.5

°C	kPa
-4	-74.2
-3	-72.9
-2	-71.6
-1	-70.1
0	-68.7
1	-67.2
2	-65.6
3	-64.0
4	-62.3
5	-60.5
6	-58.7
7	-56.8
8	-54.9
9	-52.8
10	-50.8
11	-48.6
12	-46.4
13	-44.1
14	-41.7
15	-39.2
16	-36.7
17	-34.1
18	-31.4
19	-28.6
20	-25.7
21	-22.8
22	-19.7
23	-16.5
24	-13.3
25	-10.0
26	-6.5
27	-3.0
28	0.7
29	4.4
30	8.3
31	12.2

°C	kPa
32	16.3
33	20.5
34	24.8
35	29.2
36	33.7
37	38.4
38	43.2
39	48.1
40	53.1
41	58.3
42	63.6
43	69.1
44	74.6
45	80.4
46	86.2
47	92.2
48	98.4
49	104.7
50	111.1
51	117.7
52	124.5
53	131.4
54	138.5
55	145.8
56	153.2
57	160.8
58	168.5
59	176.5
60	184.6
61	192.8
62	201.3
63	210.0
64	218.8
65	227.8

Negative kPa = vacuum. Bold rows: 4 °C and 38 °C. Reference only: always verify with the manufacturer’s data and your gauges.

How to use

Choose Temperature or Pressure and type the number. The answer shows straight away.
Blends show two values: use vapor (dew) for superheat and liquid (bubble) for subcooling.
Tap °C · kPa for metric. Below 0 psig, pressure is in inches of mercury (inHg) vacuum.
Press Print pocket chart for a one-page chart (Letter or A4) for the van or the tool bag.

About this R-123 chart

This R-123 pressure temperature chart gives the saturation pressure for every degree, in psig with °F or kPa (gauge) with °C. Below 0 psig the °F table shows inches of mercury (inHg) vacuum.

Source: manufacturer and supplier charts (Arkema, National Refrigerants), checked against NIST. Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-123 pressure at 40 °F?

18.2 inHg vacuum at saturation, from the table above.

What is the R-123 pressure at 100 °F?

6.1 psig at saturation.

Does R-123 have glide?

No. R-123 is a single-component refrigerant, so one saturation pressure works for both superheat and subcooling.

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R-123 PT Chart

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R-123 pressure temperature table

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