R-422B PT Chart

R-422B saturation pressure, −40 to 150 °F−40 to 65 °C. Used in R-22 A/C retrofits (NU-22B).

How to use ↓

Safety class A1Zeotropic blendGlide 7.36 °F at 40 °F evapGlide 4.09 K at 4.4 °C evap

PT lookup

Step 1 Refrigerant

Step 2 I know the

Temperature Pressure

Step 3 Temperature

°F°C

Type a temperature to see the saturation pressure.

R-422B pressure temperature table

Liquid = bubble (subcooling). Vapor = dew (superheat). Below 0 psig: inches of mercury vacuum. Highlighted: 40 °F and 100 °F.Liquid = bubble (subcooling). Vapor = dew (superheat). Negative kPa = vacuum. Highlighted: 4 °C and 38 °C.

R-422B saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-40	0.9	5.5 inHg
-39	1.3	4.8 inHg
-38	1.7	4.1 inHg
-37	2.2	3.4 inHg
-36	2.6	2.6 inHg
-35	3.0	1.9 inHg
-34	3.5	1.1 inHg
-33	3.9	0.3 inHg
-32	4.4	0.2
-31	4.9	0.6
-30	5.3	1.1
-29	5.8	1.5
-28	6.3	1.9
-27	6.9	2.3
-26	7.4	2.8
-25	7.9	3.2
-24	8.4	3.7
-23	9.0	4.2
-22	9.6	4.7
-21	10.1	5.2
-20	10.7	5.7
-19	11.3	6.2
-18	11.9	6.7
-17	12.5	7.2
-16	13.1	7.8
-15	13.8	8.3
-14	14.4	8.9
-13	15.1	9.5
-12	15.7	10.1
-11	16.4	10.7
-10	17.1	11.3
-9	17.8	11.9
-8	18.5	12.5
-7	19.3	13.2
-6	20.0	13.8
-5	20.7	14.5
-4	21.5	15.2
-3	22.3	15.9
-2	23.1	16.6
-1	23.9	17.3
0	24.7	18.0
1	25.5	18.8
2	26.4	19.5
3	27.2	20.3
4	28.1	21.1
5	29.0	21.9
6	29.9	22.7
7	30.8	23.5
8	31.7	24.4
9	32.6	25.2
10	33.6	26.1
11	34.6	26.9
12	35.5	27.8
13	36.5	28.7
14	37.6	29.7
15	38.6	30.6
16	39.6	31.6
17	40.7	32.5
18	41.8	33.5
19	42.9	34.5
20	44.0	35.5
21	45.1	36.6
22	46.2	37.6
23	47.4	38.7
24	48.5	39.7
25	49.7	40.8
26	50.9	42.0
27	52.2	43.1
28	53.4	44.2
29	54.6	45.4
30	55.9	46.6
31	57.2	47.8
32	58.5	49.0
33	59.8	50.2
34	61.2	51.5
35	62.6	52.7
36	63.9	54.0
37	65.3	55.3
38	66.8	56.7
39	68.2	58.0
40	69.6	59.4
41	71.1	60.7
42	72.6	62.1
43	74.1	63.6
44	75.7	65.0
45	77.2	66.5
46	78.8	67.9
47	80.4	69.4
48	82.0	71.0
49	83.6	72.5
50	85.3	74.1
51	87.0	75.7
52	88.7	77.3
53	90.4	78.9
54	92.1	80.5
55	93.9	82.2
56	95.7	83.9
57	97.5	85.6
58	99.3	87.3
59	101.1	89.1
60	103.0	90.9
61	104.9	92.7
62	106.8	94.5
63	108.7	96.4
64	110.7	98.2
65	112.7	100.1
66	114.7	102.0
67	116.7	104.0
68	118.8	106.0
69	120.9	108.0
70	123.0	110.0
71	125.1	112.0
72	127.2	114.1
73	129.4	116.2
74	131.6	118.3
75	133.9	120.4
76	136.1	122.6
77	138.4	124.8
78	140.7	127.0
79	143.0	129.3
80	145.4	131.5
81	147.7	133.8
82	150.2	136.2
83	152.6	138.5
84	155.0	140.9
85	157.5	143.3
86	160.0	145.8
87	162.6	148.2
88	165.2	150.7
89	167.8	153.2
90	170.4	155.8
91	173.0	158.4
92	175.7	161.0
93	178.4	163.6
94	181.2	166.3
95	183.9	169.0
96	186.7	171.7
97	189.5	174.5
98	192.4	177.3
99	195.3	180.1
100	198.2	182.9
101	201.1	185.8
102	204.1	188.7
103	207.1	191.7
104	210.1	194.7
105	213.2	197.7
106	216.3	200.7
107	219.4	203.8
108	222.6	206.9
109	225.8	210.0
110	229.0	213.2
111	232.3	216.4
112	235.6	219.7
113	238.9	222.9
114	242.2	226.3
115	245.6	229.6
116	249.0	233.0
117	252.5	236.4
118	256.0	239.9
119	259.5	243.4
120	263.1	246.9
121	266.7	250.4
122	270.3	254.0
123	273.9	257.7
124	277.6	261.4
125	281.4	265.1
126	285.1	268.8
127	289.0	272.6
128	292.8	276.4
129	296.7	280.3
130	300.6	284.2
131	304.5	288.2
132	308.5	292.1
133	312.6	296.2
134	316.6	300.2
135	320.7	304.4
136	324.9	308.5
137	329.1	312.7
138	333.3	316.9
139	337.5	321.2
140	341.8	325.5
141	346.2	329.9
142	350.6	334.3
143	355.0	338.8
144	359.4	343.3
145	363.9	347.8
146	368.5	352.4
147	373.1	357.1
148	377.7	361.8
149	382.4	366.5
150	387.1	371.3

R-422B saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-40	6.3	-18.6
-39	11.4	-14.4
-38	16.6	-9.9
-37	22.1	-5.3
-36	27.7	-0.6
-35	33.5	4.4
-34	39.6	9.6
-33	45.8	14.9
-32	52.3	20.5
-31	59.0	26.2
-30	65.9	32.2
-29	73.0	38.4
-28	80.3	44.8
-27	87.9	51.5
-26	95.8	58.3
-25	103.9	65.4
-24	112.2	72.8
-23	120.9	80.4
-22	129.7	88.3
-21	138.9	96.4
-20	148.3	104.8
-19	158.0	113.4
-18	168.0	122.4
-17	178.3	131.6
-16	188.9	141.1
-15	199.8	150.9
-14	210.9	161.0
-13	222.5	171.4
-12	234.3	182.2
-11	246.5	193.2
-10	258.9	204.6
-9	271.8	216.3
-8	285.0	228.3
-7	298.5	240.7
-6	312.4	253.5
-5	326.6	266.6
-4	341.2	280.1
-3	356.2	293.9
-2	371.6	308.1
-1	387.3	322.7
0	403.5	337.7
1	420.0	353.1
2	437.0	368.9
3	454.3	385.1
4	472.1	401.7
5	490.3	418.8
6	509.0	436.3
7	528.1	454.2
8	547.6	472.6
9	567.6	491.4
10	588.0	510.7
11	608.9	530.5
12	630.3	550.7
13	652.1	571.4
14	674.4	592.6
15	697.3	614.3
16	720.6	636.5
17	744.4	659.3
18	768.8	682.5
19	793.6	706.3
20	819.0	730.6
21	844.9	755.4
22	871.4	780.8
23	898.4	806.8
24	926.0	833.3
25	954.1	860.5
26	982.8	888.1
27	1012.1	916.4
28	1042.0	945.3
29	1072.4	974.8
30	1103.5	1004.9
31	1135.1	1035.7
32	1167.4	1067.1
33	1200.3	1099.1
34	1233.9	1131.8
35	1268.1	1165.1
36	1302.9	1199.1
37	1338.4	1233.8
38	1374.6	1269.2
39	1411.4	1305.3
40	1448.9	1342.1
41	1487.1	1379.7
42	1526.0	1417.9
43	1565.6	1456.9
44	1606.0	1496.7
45	1647.0	1537.2
46	1688.8	1578.4
47	1731.4	1620.5
48	1774.7	1663.4
49	1818.7	1707.1
50	1863.6	1751.6
51	1909.2	1796.9
52	1955.6	1843.1
53	2002.8	1890.1
54	2050.9	1938.0
55	2099.7	1986.8
56	2149.4	2036.5
57	2200.0	2087.1
58	2251.4	2138.6
59	2303.7	2191.1
60	2356.9	2244.6
61	2410.9	2299.0
62	2465.9	2354.5
63	2521.8	2410.9
64	2578.6	2468.4
65	2636.4	2527.0

Back to the lookup ↑

R-422B PT Chart

°F / psig · Safety class A1 · Zeotropic blend

refrigerantptchart.com

°F	Liquid	Vapor
-40	0.9	5.5"
-39	1.3	4.8"
-38	1.7	4.1"
-37	2.2	3.4"
-36	2.6	2.6"
-35	3.0	1.9"
-34	3.5	1.1"
-33	3.9	0.3"
-32	4.4	0.2
-31	4.9	0.6
-30	5.3	1.1
-29	5.8	1.5
-28	6.3	1.9
-27	6.9	2.3
-26	7.4	2.8
-25	7.9	3.2
-24	8.4	3.7
-23	9.0	4.2
-22	9.6	4.7
-21	10.1	5.2
-20	10.7	5.7
-19	11.3	6.2
-18	11.9	6.7
-17	12.5	7.2
-16	13.1	7.8
-15	13.8	8.3
-14	14.4	8.9
-13	15.1	9.5
-12	15.7	10.1
-11	16.4	10.7
-10	17.1	11.3
-9	17.8	11.9
-8	18.5	12.5
-7	19.3	13.2
-6	20.0	13.8
-5	20.7	14.5
-4	21.5	15.2
-3	22.3	15.9
-2	23.1	16.6
-1	23.9	17.3
0	24.7	18.0
1	25.5	18.8
2	26.4	19.5
3	27.2	20.3
4	28.1	21.1
5	29.0	21.9
6	29.9	22.7
7	30.8	23.5

°F	Liquid	Vapor
8	31.7	24.4
9	32.6	25.2
10	33.6	26.1
11	34.6	26.9
12	35.5	27.8
13	36.5	28.7
14	37.6	29.7
15	38.6	30.6
16	39.6	31.6
17	40.7	32.5
18	41.8	33.5
19	42.9	34.5
20	44.0	35.5
21	45.1	36.6
22	46.2	37.6
23	47.4	38.7
24	48.5	39.7
25	49.7	40.8
26	50.9	42.0
27	52.2	43.1
28	53.4	44.2
29	54.6	45.4
30	55.9	46.6
31	57.2	47.8
32	58.5	49.0
33	59.8	50.2
34	61.2	51.5
35	62.6	52.7
36	63.9	54.0
37	65.3	55.3
38	66.8	56.7
39	68.2	58.0
40	69.6	59.4
41	71.1	60.7
42	72.6	62.1
43	74.1	63.6
44	75.7	65.0
45	77.2	66.5
46	78.8	67.9
47	80.4	69.4
48	82.0	71.0
49	83.6	72.5
50	85.3	74.1
51	87.0	75.7
52	88.7	77.3
53	90.4	78.9
54	92.1	80.5
55	93.9	82.2

°F	Liquid	Vapor
56	95.7	83.9
57	97.5	85.6
58	99.3	87.3
59	101.1	89.1
60	103.0	90.9
61	104.9	92.7
62	106.8	94.5
63	108.7	96.4
64	110.7	98.2
65	112.7	100.1
66	114.7	102.0
67	116.7	104.0
68	118.8	106.0
69	120.9	108.0
70	123.0	110.0
71	125.1	112.0
72	127.2	114.1
73	129.4	116.2
74	131.6	118.3
75	133.9	120.4
76	136.1	122.6
77	138.4	124.8
78	140.7	127.0
79	143.0	129.3
80	145.4	131.5
81	147.7	133.8
82	150.2	136.2
83	152.6	138.5
84	155.0	140.9
85	157.5	143.3
86	160.0	145.8
87	162.6	148.2
88	165.2	150.7
89	167.8	153.2
90	170.4	155.8
91	173.0	158.4
92	175.7	161.0
93	178.4	163.6
94	181.2	166.3
95	183.9	169.0
96	186.7	171.7
97	189.5	174.5
98	192.4	177.3
99	195.3	180.1
100	198.2	182.9
101	201.1	185.8
102	204.1	188.7
103	207.1	191.7

°F	Liquid	Vapor
104	210.1	194.7
105	213.2	197.7
106	216.3	200.7
107	219.4	203.8
108	222.6	206.9
109	225.8	210.0
110	229.0	213.2
111	232.3	216.4
112	235.6	219.7
113	238.9	222.9
114	242.2	226.3
115	245.6	229.6
116	249.0	233.0
117	252.5	236.4
118	256.0	239.9
119	259.5	243.4
120	263.1	246.9
121	266.7	250.4
122	270.3	254.0
123	273.9	257.7
124	277.6	261.4
125	281.4	265.1
126	285.1	268.8
127	289.0	272.6
128	292.8	276.4
129	296.7	280.3
130	300.6	284.2
131	304.5	288.2
132	308.5	292.1
133	312.6	296.2
134	316.6	300.2
135	320.7	304.4
136	324.9	308.5
137	329.1	312.7
138	333.3	316.9
139	337.5	321.2
140	341.8	325.5
141	346.2	329.9
142	350.6	334.3
143	355.0	338.8
144	359.4	343.3
145	363.9	347.8
146	368.5	352.4
147	373.1	357.1
148	377.7	361.8
149	382.4	366.5
150	387.1	371.3

Liquid = bubble (use for subcooling). Vapor = dew (use for superheat). 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-422B PT Chart

°C / kPa (gauge) · Safety class A1 · Zeotropic blend

refrigerantptchart.com

°C	Liquid	Vapor
-40	6.3	-18.6
-39	11.4	-14.4
-38	16.6	-9.9
-37	22.1	-5.3
-36	27.7	-0.6
-35	33.5	4.4
-34	39.6	9.6
-33	45.8	14.9
-32	52.3	20.5
-31	59.0	26.2
-30	65.9	32.2
-29	73.0	38.4
-28	80.3	44.8
-27	87.9	51.5
-26	95.8	58.3
-25	103.9	65.4
-24	112.2	72.8
-23	120.9	80.4
-22	129.7	88.3
-21	138.9	96.4
-20	148.3	104.8
-19	158.0	113.4
-18	168.0	122.4
-17	178.3	131.6
-16	188.9	141.1
-15	199.8	150.9
-14	210.9	161.0
-13	222.5	171.4
-12	234.3	182.2
-11	246.5	193.2
-10	258.9	204.6
-9	271.8	216.3
-8	285.0	228.3
-7	298.5	240.7
-6	312.4	253.5
-5	326.6	266.6

°C	Liquid	Vapor
-4	341.2	280.1
-3	356.2	293.9
-2	371.6	308.1
-1	387.3	322.7
0	403.5	337.7
1	420.0	353.1
2	437.0	368.9
3	454.3	385.1
4	472.1	401.7
5	490.3	418.8
6	509.0	436.3
7	528.1	454.2
8	547.6	472.6
9	567.6	491.4
10	588.0	510.7
11	608.9	530.5
12	630.3	550.7
13	652.1	571.4
14	674.4	592.6
15	697.3	614.3
16	720.6	636.5
17	744.4	659.3
18	768.8	682.5
19	793.6	706.3
20	819.0	730.6
21	844.9	755.4
22	871.4	780.8
23	898.4	806.8
24	926.0	833.3
25	954.1	860.5
26	982.8	888.1
27	1012.1	916.4
28	1042.0	945.3
29	1072.4	974.8
30	1103.5	1004.9
31	1135.1	1035.7

°C	Liquid	Vapor
32	1167.4	1067.1
33	1200.3	1099.1
34	1233.9	1131.8
35	1268.1	1165.1
36	1302.9	1199.1
37	1338.4	1233.8
38	1374.6	1269.2
39	1411.4	1305.3
40	1448.9	1342.1
41	1487.1	1379.7
42	1526.0	1417.9
43	1565.6	1456.9
44	1606.0	1496.7
45	1647.0	1537.2
46	1688.8	1578.4
47	1731.4	1620.5
48	1774.7	1663.4
49	1818.7	1707.1
50	1863.6	1751.6
51	1909.2	1796.9
52	1955.6	1843.1
53	2002.8	1890.1
54	2050.9	1938.0
55	2099.7	1986.8
56	2149.4	2036.5
57	2200.0	2087.1
58	2251.4	2138.6
59	2303.7	2191.1
60	2356.9	2244.6
61	2410.9	2299.0
62	2465.9	2354.5
63	2521.8	2410.9
64	2578.6	2468.4
65	2636.4	2527.0

Liquid = bubble (use for subcooling). Vapor = dew (use for superheat). 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-422B chart

This R-422B pressure temperature chart gives the saturation pressure for every degree, in psig with °F or kPa (gauge) with °C. As a blend, it has a liquid (bubble) and a vapor (dew) column. Below 0 psig the °F table shows inches of mercury (inHg) vacuum.

Source: manufacturer charts (Chemours). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-422B pressure at 40 °F?

59.4 psig vapor (dew) and 69.6 psig liquid (bubble) at saturation, from the table above.

What is the R-422B pressure at 100 °F?

182.9 psig vapor (dew) and 198.2 psig liquid (bubble) at saturation.

Which column do I use for superheat and subcooling?

Use vapor (dew) for superheat and liquid (bubble) for subcooling. R-422B has 7.36 °F of glide at a 40 °F evaporator, so the two columns differ.

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R-422B PT Chart

PT lookup

R-422B pressure temperature table

How to use

About this R-422B chart

FAQ

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