R-502 PT Chart

R-502 saturation pressure, −40 to 140 °F−40 to 60 °C. Used in legacy low-temperature commercial refrigeration.

Safety class A1Azeotropic blendNo glide (azeotrope)No glide (azeotrope)

R-502 is a blend of R-22 and R-115, a CFC. US production and import of CFCs ended on 1 January 1996 (limited exemptions), so systems are serviced from recovered, recycled or previously produced refrigerant. Source: US EPA: Phaseout of Class I Ozone-Depleting Substances.

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-502 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.

The table covers −40 to 140 °F−40 to 60 °C only: the published manufacturer data stops there, and the table is not extrapolated past it.

R-502 saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-40	4.0	4.0
-39	4.5	4.5
-38	5.0	5.0
-37	5.5	5.5
-36	6.0	6.0
-35	6.5	6.5
-34	7.0	7.0
-33	7.5	7.5
-32	8.1	8.0
-31	8.6	8.6
-30	9.2	9.2
-29	9.7	9.7
-28	10.3	10.3
-27	10.9	10.9
-26	11.5	11.5
-25	12.1	12.1
-24	12.7	12.7
-23	13.3	13.3
-22	14.0	14.0
-21	14.6	14.6
-20	15.3	15.3
-19	16.0	16.0
-18	16.7	16.7
-17	17.4	17.4
-16	18.1	18.1
-15	18.8	18.8
-14	19.5	19.5
-13	20.3	20.3
-12	21.0	21.0
-11	21.8	21.8
-10	22.6	22.6
-9	23.4	23.4
-8	24.2	24.2
-7	25.0	25.0
-6	25.8	25.8
-5	26.7	26.7
-4	27.5	27.5
-3	28.4	28.4
-2	29.3	29.3
-1	30.2	30.2
0	31.1	31.1
1	32.0	32.0
2	33.0	33.0
3	33.9	33.9
4	34.9	34.9
5	35.9	35.9
6	36.9	36.9
7	37.9	37.9
8	38.9	38.9
9	40.0	40.0
10	41.0	41.0
11	42.1	42.1
12	43.2	43.2
13	44.3	44.3
14	45.4	45.4
15	46.6	46.6
16	47.7	47.7
17	48.9	48.9
18	50.1	50.1
19	51.3	51.3
20	52.5	52.5
21	53.7	53.7
22	55.0	55.0
23	56.3	56.3
24	57.5	57.6
25	58.9	58.9
26	60.2	60.2
27	61.5	61.5
28	62.9	62.9
29	64.2	64.2
30	65.6	65.6
31	67.0	67.0
32	68.5	68.5
33	69.9	69.9
34	71.4	71.4
35	72.9	72.9
36	74.4	74.4
37	75.9	75.9
38	77.4	77.4
39	79.0	79.0
40	80.6	80.6
41	82.2	82.2
42	83.8	83.8
43	85.4	85.4
44	87.1	87.1
45	88.7	88.7
46	90.4	90.4
47	92.2	92.2
48	93.9	93.9
49	95.6	95.6
50	97.4	97.4
51	99.2	99.2
52	101.0	101.0
53	102.9	102.9
54	104.8	104.7
55	106.6	106.6
56	108.5	108.5
57	110.5	110.5
58	112.4	112.4
59	114.4	114.4
60	116.4	116.4
61	118.4	118.4
62	120.4	120.4
63	122.5	122.5
64	124.6	124.6
65	126.7	126.7
66	128.8	128.8
67	131.0	131.0
68	133.1	133.1
69	135.3	135.3
70	137.6	137.6
71	139.8	139.8
72	142.1	142.1
73	144.4	144.4
74	146.7	146.7
75	149.1	149.0
76	151.4	151.4
77	153.8	153.8
78	156.2	156.2
79	158.7	158.7
80	161.2	161.1
81	163.6	163.6
82	166.2	166.2
83	168.7	168.7
84	171.3	171.3
85	173.9	173.9
86	176.5	176.5
87	179.2	179.2
88	181.8	181.8
89	184.5	184.5
90	187.3	187.3
91	190.0	190.0
92	192.8	192.8
93	195.6	195.6
94	198.5	198.5
95	201.4	201.4
96	204.3	204.2
97	207.2	207.2
98	210.1	210.1
99	213.1	213.1
100	216.1	216.1
101	219.2	219.2
102	222.2	222.2
103	225.3	225.3
104	228.5	228.5
105	231.6	231.6
106	234.8	234.8
107	238.0	238.0
108	241.3	241.3
109	244.6	244.6
110	247.9	247.9
111	251.2	251.2
112	254.6	254.6
113	258.0	258.0
114	261.4	261.4
115	264.9	264.9
116	268.4	268.4
117	271.9	271.9
118	275.5	275.5
119	279.1	279.1
120	282.7	282.7
121	286.4	286.4
122	290.1	290.1
123	293.8	293.8
124	297.6	297.6
125	301.4	301.4
126	305.2	305.2
127	309.1	309.1
128	313.0	313.0
129	317.0	317.0
130	320.9	320.9
131	324.9	324.9
132	329.0	329.0
133	333.1	333.1
134	337.2	337.2
135	341.4	341.4
136	345.6	345.5
137	349.8	349.8
138	354.1	354.1
139	358.4	358.4
140	362.7	362.7

R-502 saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-40	27.8	27.7
-39	33.7	33.6
-38	39.8	39.7
-37	46.1	46.0
-36	52.6	52.5
-35	59.3	59.3
-34	66.3	66.2
-33	73.4	73.4
-32	80.8	80.8
-31	88.5	88.5
-30	96.4	96.4
-29	104.5	104.5
-28	112.9	112.9
-27	121.6	121.6
-26	130.5	130.5
-25	139.7	139.7
-24	149.1	149.2
-23	158.9	158.9
-22	168.9	168.9
-21	179.2	179.2
-20	189.8	189.9
-19	200.7	200.8
-18	212.0	212.0
-17	223.5	223.5
-16	235.3	235.4
-15	247.5	247.5
-14	260.0	260.0
-13	272.8	272.8
-12	285.9	286.0
-11	299.4	299.5
-10	313.3	313.3
-9	327.5	327.5
-8	342.0	342.1
-7	357.0	357.0
-6	372.3	372.3
-5	387.9	388.0
-4	404.0	404.0
-3	420.4	420.4
-2	437.2	437.3
-1	454.4	454.5
0	472.1	472.1
1	490.1	490.1
2	508.6	508.6
3	527.4	527.4
4	546.7	546.7
5	566.4	566.5
6	586.6	586.6
7	607.2	607.2
8	628.3	628.3
9	649.8	649.8
10	671.7	671.7
11	694.2	694.2
12	717.1	717.1
13	740.5	740.4
14	764.3	764.3
15	788.7	788.7
16	813.5	813.5
17	838.9	838.9
18	864.8	864.7
19	891.1	891.1
20	918.0	918.0
21	945.5	945.4
22	973.4	973.4
23	1001.9	1001.9
24	1030.9	1030.9
25	1060.5	1060.5
26	1090.7	1090.7
27	1121.4	1121.4
28	1152.7	1152.7
29	1184.6	1184.5
30	1217.0	1217.0
31	1250.1	1250.0
32	1283.7	1283.7
33	1317.9	1317.9
34	1352.8	1352.8
35	1388.3	1388.3
36	1424.4	1424.4
37	1461.1	1461.1
38	1498.5	1498.5
39	1536.6	1536.6
40	1575.2	1575.3
41	1614.6	1614.6
42	1654.6	1654.7
43	1695.4	1695.4
44	1736.8	1736.8
45	1778.9	1778.9
46	1821.7	1821.7
47	1865.2	1865.2
48	1909.5	1909.5
49	1954.4	1954.5
50	2000.2	2000.2
51	2046.7	2046.7
52	2093.9	2094.0
53	2142.0	2142.0
54	2190.8	2190.8
55	2240.4	2240.4
56	2290.8	2290.8
57	2342.1	2342.1
58	2394.1	2394.1
59	2447.1	2447.0
60	2500.8	2500.8

Back to the lookup ↑

R-502 PT Chart

°F / psig · Safety class A1 · Azeotropic blend

refrigerantptchart.com

°F	Liquid	Vapor
-40	4.0	4.0
-39	4.5	4.5
-38	5.0	5.0
-37	5.5	5.5
-36	6.0	6.0
-35	6.5	6.5
-34	7.0	7.0
-33	7.5	7.5
-32	8.1	8.0
-31	8.6	8.6
-30	9.2	9.2
-29	9.7	9.7
-28	10.3	10.3
-27	10.9	10.9
-26	11.5	11.5
-25	12.1	12.1
-24	12.7	12.7
-23	13.3	13.3
-22	14.0	14.0
-21	14.6	14.6
-20	15.3	15.3
-19	16.0	16.0
-18	16.7	16.7
-17	17.4	17.4
-16	18.1	18.1
-15	18.8	18.8
-14	19.5	19.5
-13	20.3	20.3
-12	21.0	21.0
-11	21.8	21.8
-10	22.6	22.6
-9	23.4	23.4
-8	24.2	24.2
-7	25.0	25.0
-6	25.8	25.8
-5	26.7	26.7
-4	27.5	27.5
-3	28.4	28.4
-2	29.3	29.3
-1	30.2	30.2
0	31.1	31.1
1	32.0	32.0
2	33.0	33.0
3	33.9	33.9
4	34.9	34.9
5	35.9	35.9

°F	Liquid	Vapor
6	36.9	36.9
7	37.9	37.9
8	38.9	38.9
9	40.0	40.0
10	41.0	41.0
11	42.1	42.1
12	43.2	43.2
13	44.3	44.3
14	45.4	45.4
15	46.6	46.6
16	47.7	47.7
17	48.9	48.9
18	50.1	50.1
19	51.3	51.3
20	52.5	52.5
21	53.7	53.7
22	55.0	55.0
23	56.3	56.3
24	57.5	57.6
25	58.9	58.9
26	60.2	60.2
27	61.5	61.5
28	62.9	62.9
29	64.2	64.2
30	65.6	65.6
31	67.0	67.0
32	68.5	68.5
33	69.9	69.9
34	71.4	71.4
35	72.9	72.9
36	74.4	74.4
37	75.9	75.9
38	77.4	77.4
39	79.0	79.0
40	80.6	80.6
41	82.2	82.2
42	83.8	83.8
43	85.4	85.4
44	87.1	87.1
45	88.7	88.7
46	90.4	90.4
47	92.2	92.2
48	93.9	93.9
49	95.6	95.6
50	97.4	97.4
51	99.2	99.2

°F	Liquid	Vapor
52	101.0	101.0
53	102.9	102.9
54	104.8	104.7
55	106.6	106.6
56	108.5	108.5
57	110.5	110.5
58	112.4	112.4
59	114.4	114.4
60	116.4	116.4
61	118.4	118.4
62	120.4	120.4
63	122.5	122.5
64	124.6	124.6
65	126.7	126.7
66	128.8	128.8
67	131.0	131.0
68	133.1	133.1
69	135.3	135.3
70	137.6	137.6
71	139.8	139.8
72	142.1	142.1
73	144.4	144.4
74	146.7	146.7
75	149.1	149.0
76	151.4	151.4
77	153.8	153.8
78	156.2	156.2
79	158.7	158.7
80	161.2	161.1
81	163.6	163.6
82	166.2	166.2
83	168.7	168.7
84	171.3	171.3
85	173.9	173.9
86	176.5	176.5
87	179.2	179.2
88	181.8	181.8
89	184.5	184.5
90	187.3	187.3
91	190.0	190.0
92	192.8	192.8
93	195.6	195.6
94	198.5	198.5
95	201.4	201.4
96	204.3	204.2
97	207.2	207.2

°F	Liquid	Vapor
98	210.1	210.1
99	213.1	213.1
100	216.1	216.1
101	219.2	219.2
102	222.2	222.2
103	225.3	225.3
104	228.5	228.5
105	231.6	231.6
106	234.8	234.8
107	238.0	238.0
108	241.3	241.3
109	244.6	244.6
110	247.9	247.9
111	251.2	251.2
112	254.6	254.6
113	258.0	258.0
114	261.4	261.4
115	264.9	264.9
116	268.4	268.4
117	271.9	271.9
118	275.5	275.5
119	279.1	279.1
120	282.7	282.7
121	286.4	286.4
122	290.1	290.1
123	293.8	293.8
124	297.6	297.6
125	301.4	301.4
126	305.2	305.2
127	309.1	309.1
128	313.0	313.0
129	317.0	317.0
130	320.9	320.9
131	324.9	324.9
132	329.0	329.0
133	333.1	333.1
134	337.2	337.2
135	341.4	341.4
136	345.6	345.5
137	349.8	349.8
138	354.1	354.1
139	358.4	358.4
140	362.7	362.7

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-502 PT Chart

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

refrigerantptchart.com

°C	Liquid	Vapor
-40	27.8	27.7
-39	33.7	33.6
-38	39.8	39.7
-37	46.1	46.0
-36	52.6	52.5
-35	59.3	59.3
-34	66.3	66.2
-33	73.4	73.4
-32	80.8	80.8
-31	88.5	88.5
-30	96.4	96.4
-29	104.5	104.5
-28	112.9	112.9
-27	121.6	121.6
-26	130.5	130.5
-25	139.7	139.7
-24	149.1	149.2
-23	158.9	158.9
-22	168.9	168.9
-21	179.2	179.2
-20	189.8	189.9
-19	200.7	200.8
-18	212.0	212.0
-17	223.5	223.5
-16	235.3	235.4
-15	247.5	247.5
-14	260.0	260.0
-13	272.8	272.8
-12	285.9	286.0
-11	299.4	299.5
-10	313.3	313.3
-9	327.5	327.5
-8	342.0	342.1
-7	357.0	357.0

°C	Liquid	Vapor
-6	372.3	372.3
-5	387.9	388.0
-4	404.0	404.0
-3	420.4	420.4
-2	437.2	437.3
-1	454.4	454.5
0	472.1	472.1
1	490.1	490.1
2	508.6	508.6
3	527.4	527.4
4	546.7	546.7
5	566.4	566.5
6	586.6	586.6
7	607.2	607.2
8	628.3	628.3
9	649.8	649.8
10	671.7	671.7
11	694.2	694.2
12	717.1	717.1
13	740.5	740.4
14	764.3	764.3
15	788.7	788.7
16	813.5	813.5
17	838.9	838.9
18	864.8	864.7
19	891.1	891.1
20	918.0	918.0
21	945.5	945.4
22	973.4	973.4
23	1001.9	1001.9
24	1030.9	1030.9
25	1060.5	1060.5
26	1090.7	1090.7
27	1121.4	1121.4

°C	Liquid	Vapor
28	1152.7	1152.7
29	1184.6	1184.5
30	1217.0	1217.0
31	1250.1	1250.0
32	1283.7	1283.7
33	1317.9	1317.9
34	1352.8	1352.8
35	1388.3	1388.3
36	1424.4	1424.4
37	1461.1	1461.1
38	1498.5	1498.5
39	1536.6	1536.6
40	1575.2	1575.3
41	1614.6	1614.6
42	1654.6	1654.7
43	1695.4	1695.4
44	1736.8	1736.8
45	1778.9	1778.9
46	1821.7	1821.7
47	1865.2	1865.2
48	1909.5	1909.5
49	1954.4	1954.5
50	2000.2	2000.2
51	2046.7	2046.7
52	2093.9	2094.0
53	2142.0	2142.0
54	2190.8	2190.8
55	2240.4	2240.4
56	2290.8	2290.8
57	2342.1	2342.1
58	2394.1	2394.1
59	2447.1	2447.0
60	2500.8	2500.8

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-502 chart

This R-502 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: supplier chart (National Refrigerants). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-502 pressure at 40 °F?

80.6 psig vapor (dew) and 80.6 psig liquid (bubble) at saturation, from the table above.

What is the R-502 pressure at 100 °F?

216.1 psig vapor (dew) and 216.1 psig liquid (bubble) at saturation.

Why does R-502 have two columns?

R-502 is a blend with no glide, so liquid (bubble) and vapor (dew) are almost the same. Use vapor for superheat and liquid for subcooling.

Coming from Check & Charge or PT Pro? See the free offline alternative (no login).

R-502 PT Chart

PT lookup

R-502 pressure temperature table

How to use

About this R-502 chart

FAQ

Related