R-452B PT Chart

R-452B saturation pressure, −40 to 150 °F−40 to 65 °C. Used in new A2L residential and light commercial A/C.

How to use ↓

Safety class A2LZeotropic blendGlide 2.04 °F at 40 °F evapGlide 1.13 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-452B pressure temperature table

Liquid = bubble (subcooling). Vapor = dew (superheat). Highlighted: 40 °F and 100 °F.Liquid = bubble (subcooling). Vapor = dew (superheat). Negative kPa = vacuum. Highlighted: 4 °C and 38 °C.

R-452B saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-40	9.7	8.7
-39	10.4	9.3
-38	11.0	10.0
-37	11.6	10.6
-36	12.3	11.2
-35	13.0	11.9
-34	13.6	12.5
-33	14.3	13.2
-32	15.0	13.9
-31	15.8	14.6
-30	16.5	15.3
-29	17.3	16.0
-28	18.0	16.7
-27	18.8	17.5
-26	19.6	18.2
-25	20.4	19.0
-24	21.2	19.8
-23	22.1	20.6
-22	22.9	21.4
-21	23.8	22.3
-20	24.7	23.1
-19	25.6	24.0
-18	26.5	24.9
-17	27.4	25.8
-16	28.3	26.7
-15	29.3	27.6
-14	30.3	28.5
-13	31.3	29.5
-12	32.3	30.5
-11	33.3	31.5
-10	34.4	32.5
-9	35.4	33.5
-8	36.5	34.6
-7	37.6	35.6
-6	38.7	36.7
-5	39.9	37.8
-4	41.0	38.9
-3	42.2	40.0
-2	43.4	41.2
-1	44.6	42.4
0	45.8	43.5
1	47.1	44.8
2	48.3	46.0
3	49.6	47.2
4	50.9	48.5
5	52.3	49.8
6	53.6	51.1
7	55.0	52.4
8	56.4	53.7
9	57.8	55.1
10	59.2	56.5
11	60.7	57.9
12	62.2	59.3
13	63.6	60.8
14	65.2	62.3
15	66.7	63.7
16	68.3	65.3
17	69.9	66.8
18	71.5	68.4
19	73.1	69.9
20	74.8	71.5
21	76.4	73.2
22	78.2	74.8
23	79.9	76.5
24	81.6	78.2
25	83.4	79.9
26	85.2	81.7
27	87.0	83.4
28	88.9	85.2
29	90.8	87.0
30	92.7	88.9
31	94.6	90.8
32	96.6	92.7
33	98.5	94.6
34	100.5	96.5
35	102.6	98.5
36	104.6	100.5
37	106.7	102.5
38	108.8	104.6
39	111.0	106.7
40	113.2	108.8
41	115.4	110.9
42	117.6	113.1
43	119.8	115.3
44	122.1	117.5
45	124.4	119.7
46	126.8	122.0
47	129.2	124.3
48	131.6	126.6
49	134.0	129.0
50	136.5	131.4
51	139.0	133.8
52	141.5	136.3
53	144.0	138.8
54	146.6	141.3
55	149.2	143.8
56	151.9	146.4
57	154.6	149.0
58	157.3	151.7
59	160.0	154.3
60	162.8	157.1
61	165.6	159.8
62	168.5	162.6
63	171.4	165.4
64	174.3	168.2
65	177.2	171.1
66	180.2	174.0
67	183.2	176.9
68	186.3	179.9
69	189.3	182.9
70	192.5	186.0
71	195.6	189.0
72	198.8	192.2
73	202.0	195.3
74	205.3	198.5
75	208.6	201.7
76	212.0	205.0
77	215.3	208.3
78	218.7	211.6
79	222.2	215.0
80	225.7	218.4
81	229.2	221.9
82	232.8	225.4
83	236.4	228.9
84	240.0	232.5
85	243.7	236.1
86	247.4	239.7
87	251.2	243.4
88	255.0	247.1
89	258.8	250.9
90	262.7	254.7
91	266.6	258.5
92	270.6	262.4
93	274.6	266.4
94	278.7	270.3
95	282.8	274.4
96	286.9	278.4
97	291.1	282.5
98	295.3	286.7
99	299.6	290.9
100	303.9	295.1
101	308.2	299.4
102	312.6	303.7
103	317.1	308.1
104	321.6	312.5
105	326.1	317.0
106	330.7	321.5
107	335.3	326.1
108	340.0	330.7
109	344.7	335.3
110	349.5	340.0
111	354.3	344.8
112	359.1	349.6
113	364.0	354.4
114	369.0	359.3
115	374.0	364.3
116	379.1	369.3
117	384.2	374.3
118	389.3	379.4
119	394.5	384.6
120	399.8	389.8
121	405.1	395.0
122	410.4	400.4
123	415.9	405.7
124	421.3	411.1
125	426.8	416.6
126	432.4	422.1
127	438.0	427.7
128	443.7	433.4
129	449.4	439.1
130	455.2	444.8
131	461.1	450.7
132	467.0	456.5
133	472.9	462.5
134	478.9	468.5
135	485.0	474.5
136	491.1	480.6
137	497.3	486.8
138	503.5	493.1
139	509.8	499.4
140	516.2	505.7
141	522.6	512.2
142	529.1	518.7
143	535.6	525.2
144	542.2	531.9
145	548.9	538.6
146	555.6	545.3
147	562.4	552.2
148	569.2	559.1
149	576.1	566.1
150	583.1	573.1

R-452B saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-40	67.1	60.3
-39	74.9	67.8
-38	82.9	75.5
-37	91.2	83.5
-36	99.8	91.8
-35	108.7	100.4
-34	117.9	109.2
-33	127.5	118.4
-32	137.3	127.9
-31	147.5	137.7
-30	157.9	147.8
-29	168.8	158.2
-28	180.0	169.0
-27	191.5	180.1
-26	203.4	191.6
-25	215.7	203.5
-24	228.3	215.7
-23	241.3	228.2
-22	254.8	241.2
-21	268.6	254.5
-20	282.8	268.3
-19	297.5	282.4
-18	312.5	297.0
-17	328.0	311.9
-16	344.0	327.3
-15	360.4	343.2
-14	377.2	359.5
-13	394.5	376.2
-12	412.3	393.4
-11	430.6	411.1
-10	449.3	429.2
-9	468.6	447.8
-8	488.4	467.0
-7	508.6	486.6
-6	529.4	506.7
-5	550.8	527.4
-4	572.6	548.6
-3	595.1	570.3
-2	618.1	592.6
-1	641.6	615.4
0	665.8	638.8
1	690.5	662.8
2	715.8	687.4
3	741.7	712.5
4	768.3	738.3
5	795.4	764.6
6	823.2	791.6
7	851.6	819.2
8	880.7	847.5
9	910.5	876.4
10	940.9	906.0
11	972.0	936.3
12	1003.8	967.2
13	1036.3	998.8
14	1069.5	1031.1
15	1103.4	1064.2
16	1138.1	1097.9
17	1173.5	1132.4
18	1209.6	1167.7
19	1246.6	1203.7
20	1284.2	1240.4
21	1322.7	1278.0
22	1362.0	1316.3
23	1402.0	1355.4
24	1442.9	1395.4
25	1484.6	1436.1
26	1527.2	1477.7
27	1570.6	1520.2
28	1614.8	1563.5
29	1659.9	1607.6
30	1705.9	1652.7
31	1752.8	1698.7
32	1800.6	1745.5
33	1849.4	1793.3
34	1899.0	1842.0
35	1949.6	1891.7
36	2001.1	1942.3
37	2053.6	1993.9
38	2107.1	2046.5
39	2161.6	2100.1
40	2217.1	2154.7
41	2273.6	2210.4
42	2331.1	2267.1
43	2389.6	2324.8
44	2449.3	2383.7
45	2509.9	2443.6
46	2571.7	2504.7
47	2634.6	2566.8
48	2698.6	2630.2
49	2763.7	2694.7
50	2829.9	2760.3
51	2897.3	2827.2
52	2965.9	2895.3
53	3035.7	2964.7
54	3106.7	3035.3
55	3178.9	3107.2
56	3252.3	3180.4
57	3327.0	3254.9
58	3403.0	3330.9
59	3480.3	3408.2
60	3558.8	3486.9
61	3638.8	3567.0
62	3720.0	3648.7
63	3802.7	3731.8
64	3886.7	3816.6
65	3972.2	3902.9

Back to the lookup ↑

R-452B PT Chart

°F / psig · Safety class A2L · Zeotropic blend

refrigerantptchart.com

°F	Liquid	Vapor
-40	9.7	8.7
-39	10.4	9.3
-38	11.0	10.0
-37	11.6	10.6
-36	12.3	11.2
-35	13.0	11.9
-34	13.6	12.5
-33	14.3	13.2
-32	15.0	13.9
-31	15.8	14.6
-30	16.5	15.3
-29	17.3	16.0
-28	18.0	16.7
-27	18.8	17.5
-26	19.6	18.2
-25	20.4	19.0
-24	21.2	19.8
-23	22.1	20.6
-22	22.9	21.4
-21	23.8	22.3
-20	24.7	23.1
-19	25.6	24.0
-18	26.5	24.9
-17	27.4	25.8
-16	28.3	26.7
-15	29.3	27.6
-14	30.3	28.5
-13	31.3	29.5
-12	32.3	30.5
-11	33.3	31.5
-10	34.4	32.5
-9	35.4	33.5
-8	36.5	34.6
-7	37.6	35.6
-6	38.7	36.7
-5	39.9	37.8
-4	41.0	38.9
-3	42.2	40.0
-2	43.4	41.2
-1	44.6	42.4
0	45.8	43.5
1	47.1	44.8
2	48.3	46.0
3	49.6	47.2
4	50.9	48.5
5	52.3	49.8
6	53.6	51.1
7	55.0	52.4

°F	Liquid	Vapor
8	56.4	53.7
9	57.8	55.1
10	59.2	56.5
11	60.7	57.9
12	62.2	59.3
13	63.6	60.8
14	65.2	62.3
15	66.7	63.7
16	68.3	65.3
17	69.9	66.8
18	71.5	68.4
19	73.1	69.9
20	74.8	71.5
21	76.4	73.2
22	78.2	74.8
23	79.9	76.5
24	81.6	78.2
25	83.4	79.9
26	85.2	81.7
27	87.0	83.4
28	88.9	85.2
29	90.8	87.0
30	92.7	88.9
31	94.6	90.8
32	96.6	92.7
33	98.5	94.6
34	100.5	96.5
35	102.6	98.5
36	104.6	100.5
37	106.7	102.5
38	108.8	104.6
39	111.0	106.7
40	113.2	108.8
41	115.4	110.9
42	117.6	113.1
43	119.8	115.3
44	122.1	117.5
45	124.4	119.7
46	126.8	122.0
47	129.2	124.3
48	131.6	126.6
49	134.0	129.0
50	136.5	131.4
51	139.0	133.8
52	141.5	136.3
53	144.0	138.8
54	146.6	141.3
55	149.2	143.8

°F	Liquid	Vapor
56	151.9	146.4
57	154.6	149.0
58	157.3	151.7
59	160.0	154.3
60	162.8	157.1
61	165.6	159.8
62	168.5	162.6
63	171.4	165.4
64	174.3	168.2
65	177.2	171.1
66	180.2	174.0
67	183.2	176.9
68	186.3	179.9
69	189.3	182.9
70	192.5	186.0
71	195.6	189.0
72	198.8	192.2
73	202.0	195.3
74	205.3	198.5
75	208.6	201.7
76	212.0	205.0
77	215.3	208.3
78	218.7	211.6
79	222.2	215.0
80	225.7	218.4
81	229.2	221.9
82	232.8	225.4
83	236.4	228.9
84	240.0	232.5
85	243.7	236.1
86	247.4	239.7
87	251.2	243.4
88	255.0	247.1
89	258.8	250.9
90	262.7	254.7
91	266.6	258.5
92	270.6	262.4
93	274.6	266.4
94	278.7	270.3
95	282.8	274.4
96	286.9	278.4
97	291.1	282.5
98	295.3	286.7
99	299.6	290.9
100	303.9	295.1
101	308.2	299.4
102	312.6	303.7
103	317.1	308.1

°F	Liquid	Vapor
104	321.6	312.5
105	326.1	317.0
106	330.7	321.5
107	335.3	326.1
108	340.0	330.7
109	344.7	335.3
110	349.5	340.0
111	354.3	344.8
112	359.1	349.6
113	364.0	354.4
114	369.0	359.3
115	374.0	364.3
116	379.1	369.3
117	384.2	374.3
118	389.3	379.4
119	394.5	384.6
120	399.8	389.8
121	405.1	395.0
122	410.4	400.4
123	415.9	405.7
124	421.3	411.1
125	426.8	416.6
126	432.4	422.1
127	438.0	427.7
128	443.7	433.4
129	449.4	439.1
130	455.2	444.8
131	461.1	450.7
132	467.0	456.5
133	472.9	462.5
134	478.9	468.5
135	485.0	474.5
136	491.1	480.6
137	497.3	486.8
138	503.5	493.1
139	509.8	499.4
140	516.2	505.7
141	522.6	512.2
142	529.1	518.7
143	535.6	525.2
144	542.2	531.9
145	548.9	538.6
146	555.6	545.3
147	562.4	552.2
148	569.2	559.1
149	576.1	566.1
150	583.1	573.1

Liquid = bubble (use for subcooling). Vapor = dew (use for superheat). Bold rows: 40 °F and 100 °F. Reference only: always verify with the manufacturer’s data and your gauges.

R-452B PT Chart

°C / kPa (gauge) · Safety class A2L · Zeotropic blend

refrigerantptchart.com

°C	Liquid	Vapor
-40	67.1	60.3
-39	74.9	67.8
-38	82.9	75.5
-37	91.2	83.5
-36	99.8	91.8
-35	108.7	100.4
-34	117.9	109.2
-33	127.5	118.4
-32	137.3	127.9
-31	147.5	137.7
-30	157.9	147.8
-29	168.8	158.2
-28	180.0	169.0
-27	191.5	180.1
-26	203.4	191.6
-25	215.7	203.5
-24	228.3	215.7
-23	241.3	228.2
-22	254.8	241.2
-21	268.6	254.5
-20	282.8	268.3
-19	297.5	282.4
-18	312.5	297.0
-17	328.0	311.9
-16	344.0	327.3
-15	360.4	343.2
-14	377.2	359.5
-13	394.5	376.2
-12	412.3	393.4
-11	430.6	411.1
-10	449.3	429.2
-9	468.6	447.8
-8	488.4	467.0
-7	508.6	486.6
-6	529.4	506.7
-5	550.8	527.4

°C	Liquid	Vapor
-4	572.6	548.6
-3	595.1	570.3
-2	618.1	592.6
-1	641.6	615.4
0	665.8	638.8
1	690.5	662.8
2	715.8	687.4
3	741.7	712.5
4	768.3	738.3
5	795.4	764.6
6	823.2	791.6
7	851.6	819.2
8	880.7	847.5
9	910.5	876.4
10	940.9	906.0
11	972.0	936.3
12	1003.8	967.2
13	1036.3	998.8
14	1069.5	1031.1
15	1103.4	1064.2
16	1138.1	1097.9
17	1173.5	1132.4
18	1209.6	1167.7
19	1246.6	1203.7
20	1284.2	1240.4
21	1322.7	1278.0
22	1362.0	1316.3
23	1402.0	1355.4
24	1442.9	1395.4
25	1484.6	1436.1
26	1527.2	1477.7
27	1570.6	1520.2
28	1614.8	1563.5
29	1659.9	1607.6
30	1705.9	1652.7
31	1752.8	1698.7

°C	Liquid	Vapor
32	1800.6	1745.5
33	1849.4	1793.3
34	1899.0	1842.0
35	1949.6	1891.7
36	2001.1	1942.3
37	2053.6	1993.9
38	2107.1	2046.5
39	2161.6	2100.1
40	2217.1	2154.7
41	2273.6	2210.4
42	2331.1	2267.1
43	2389.6	2324.8
44	2449.3	2383.7
45	2509.9	2443.6
46	2571.7	2504.7
47	2634.6	2566.8
48	2698.6	2630.2
49	2763.7	2694.7
50	2829.9	2760.3
51	2897.3	2827.2
52	2965.9	2895.3
53	3035.7	2964.7
54	3106.7	3035.3
55	3178.9	3107.2
56	3252.3	3180.4
57	3327.0	3254.9
58	3403.0	3330.9
59	3480.3	3408.2
60	3558.8	3486.9
61	3638.8	3567.0
62	3720.0	3648.7
63	3802.7	3731.8
64	3886.7	3816.6
65	3972.2	3902.9

Liquid = bubble (use for subcooling). Vapor = dew (use for superheat). 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-452B chart

This R-452B 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.

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

FAQ

What is the R-452B pressure at 40 °F?

108.8 psig vapor (dew) and 113.2 psig liquid (bubble) at saturation, from the table above.

What is the R-452B pressure at 100 °F?

295.1 psig vapor (dew) and 303.9 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-452B has 2.04 °F of glide at a 40 °F evaporator, so the two columns differ.

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R-452B PT Chart

PT lookup

R-452B pressure temperature table

How to use

About this R-452B chart

FAQ

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