R-402A PT Chart

R-402A saturation pressure, −40 to 145 °F−40 to 62 °C. Used in R-502 retrofits (HP80).

How to use ↓

Safety class A1Zeotropic blend (low glide)Glide 2.33 °F at 40 °F evapGlide 1.29 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-402A 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 145 °F−40 to 62 °C only: the published manufacturer data stops there, and the table is not extrapolated past it.

R-402A saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-40	7.4	5.7
-39	8.0	6.2
-38	8.5	6.8
-37	9.1	7.3
-36	9.7	7.8
-35	10.3	8.4
-34	10.9	9.0
-33	11.5	9.6
-32	12.1	10.2
-31	12.7	10.8
-30	13.4	11.4
-29	14.0	12.0
-28	14.7	12.6
-27	15.4	13.3
-26	16.1	14.0
-25	16.8	14.6
-24	17.5	15.3
-23	18.2	16.0
-22	19.0	16.7
-21	19.7	17.4
-20	20.5	18.2
-19	21.2	18.9
-18	22.0	19.7
-17	22.8	20.5
-16	23.7	21.3
-15	24.5	22.1
-14	25.3	22.9
-13	26.2	23.7
-12	27.1	24.6
-11	28.0	25.4
-10	28.9	26.3
-9	29.8	27.2
-8	30.7	28.1
-7	31.7	29.0
-6	32.6	29.9
-5	33.6	30.9
-4	34.6	31.8
-3	35.6	32.8
-2	36.6	33.8
-1	37.7	34.8
0	38.7	35.8
1	39.8	36.9
2	40.9	37.9
3	42.0	39.0
4	43.1	40.1
5	44.2	41.2
6	45.4	42.3
7	46.6	43.4
8	47.7	44.6
9	49.0	45.8
10	50.2	46.9
11	51.4	48.2
12	52.7	49.4
13	53.9	50.6
14	55.2	51.9
15	56.6	53.2
16	57.9	54.5
17	59.2	55.8
18	60.6	57.1
19	62.0	58.5
20	63.4	59.8
21	64.8	61.2
22	66.3	62.6
23	67.7	64.1
24	69.2	65.5
25	70.7	67.0
26	72.2	68.5
27	73.8	70.0
28	75.4	71.5
29	76.9	73.1
30	78.5	74.7
31	80.2	76.3
32	81.8	77.9
33	83.5	79.5
34	85.2	81.2
35	86.9	82.8
36	88.6	84.5
37	90.4	86.3
38	92.2	88.0
39	94.0	89.8
40	95.8	91.6
41	97.7	93.4
42	99.5	95.2
43	101.4	97.1
44	103.3	99.0
45	105.3	100.9
46	107.2	102.8
47	109.2	104.8
48	111.2	106.8
49	113.3	108.8
50	115.3	110.8
51	117.4	112.9
52	119.5	114.9
53	121.7	117.0
54	123.8	119.2
55	126.0	121.3
56	128.3	123.5
57	130.5	125.7
58	132.8	128.0
59	135.0	130.2
60	137.4	132.5
61	139.7	134.8
62	142.1	137.2
63	144.5	139.5
64	146.9	141.9
65	149.4	144.4
66	151.8	146.8
67	154.4	149.3
68	156.9	151.8
69	159.5	154.3
70	162.1	156.9
71	164.7	159.5
72	167.3	162.1
73	170.0	164.8
74	172.7	167.5
75	175.5	170.2
76	178.2	172.9
77	181.0	175.7
78	183.9	178.5
79	186.7	181.3
80	189.6	184.2
81	192.5	187.1
82	195.5	190.0
83	198.5	193.0
84	201.5	196.0
85	204.5	199.0
86	207.6	202.0
87	210.7	205.1
88	213.9	208.3
89	217.0	211.4
90	220.2	214.6
91	223.5	217.8
92	226.8	221.1
93	230.1	224.4
94	233.4	227.7
95	236.8	231.0
96	240.2	234.4
97	243.6	237.9
98	247.1	241.3
99	250.6	244.8
100	254.2	248.4
101	257.8	251.9
102	261.4	255.5
103	265.0	259.2
104	268.7	262.8
105	272.5	266.6
106	276.2	270.3
107	280.0	274.1
108	283.9	277.9
109	287.7	281.8
110	291.7	285.7
111	295.6	289.6
112	299.6	293.6
113	303.6	297.6
114	307.7	301.7
115	311.8	305.8
116	315.9	309.9
117	320.1	314.1
118	324.3	318.3
119	328.6	322.6
120	332.9	326.9
121	337.3	331.2
122	341.6	335.6
123	346.1	340.0
124	350.5	344.5
125	355.0	349.0
126	359.6	353.6
127	364.2	358.2
128	368.8	362.8
129	373.5	367.5
130	378.2	372.2
131	383.0	377.0
132	387.8	381.8
133	392.6	386.6
134	397.5	391.5
135	402.4	396.5
136	407.4	401.5
137	412.4	406.5
138	417.5	411.6
139	422.6	416.8
140	427.8	421.9
141	433.0	427.2
142	438.2	432.4
143	443.5	437.8
144	448.9	443.1
145	454.3	448.5

R-402A saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-40	51.3	39.4
-39	58.1	45.9
-38	65.1	52.6
-37	72.4	59.5
-36	80.0	66.7
-35	87.8	74.2
-34	95.8	81.9
-33	104.1	89.8
-32	112.7	98.1
-31	121.5	106.5
-30	130.7	115.3
-29	140.1	124.4
-28	149.8	133.7
-27	159.8	143.3
-26	170.1	153.2
-25	180.7	163.5
-24	191.6	174.0
-23	202.8	184.8
-22	214.4	196.0
-21	226.3	207.5
-20	238.5	219.4
-19	251.1	231.6
-18	264.0	244.1
-17	277.3	257.0
-16	291.0	270.2
-15	305.0	283.9
-14	319.4	297.8
-13	334.2	312.2
-12	349.3	327.0
-11	364.9	342.1
-10	380.9	357.7
-9	397.2	373.7
-8	414.0	390.1
-7	431.2	406.9
-6	448.9	424.1
-5	467.0	441.8
-4	485.5	459.9
-3	504.5	478.4
-2	523.9	497.4
-1	543.8	516.9
0	564.2	536.9
1	585.0	557.3
2	606.3	578.2
3	628.1	599.6
4	650.5	621.6
5	673.3	644.0
6	696.6	666.9
7	720.5	690.4
8	744.9	714.4
9	769.8	738.9
10	795.3	764.0
11	821.3	789.6
12	847.9	815.8
13	875.1	842.6
14	902.8	869.9
15	931.1	897.9
16	960.0	926.4
17	989.5	955.5
18	1019.7	985.3
19	1050.4	1015.7
20	1081.7	1046.7
21	1113.7	1078.3
22	1146.3	1110.6
23	1179.6	1143.5
24	1213.5	1177.1
25	1248.1	1211.4
26	1283.4	1246.3
27	1319.4	1281.9
28	1356.0	1318.3
29	1393.3	1355.3
30	1431.4	1393.1
31	1470.2	1431.6
32	1509.7	1470.8
33	1549.9	1510.8
34	1590.9	1551.5
35	1632.6	1593.0
36	1675.1	1635.2
37	1718.3	1678.3
38	1762.4	1722.1
39	1807.2	1766.8
40	1852.9	1812.2
41	1899.3	1858.5
42	1946.6	1905.7
43	1994.7	1953.6
44	2043.6	2002.4
45	2093.4	2052.1
46	2144.1	2102.7
47	2195.6	2154.2
48	2248.0	2206.5
49	2301.3	2259.8
50	2355.5	2314.0
51	2410.6	2369.1
52	2466.6	2425.2
53	2523.6	2482.2
54	2581.5	2540.2
55	2640.4	2599.1
56	2700.2	2659.1
57	2761.0	2720.1
58	2822.8	2782.1
59	2885.7	2845.1
60	2949.5	2909.1
61	3014.3	2974.2
62	3080.2	3040.4

Back to the lookup ↑

R-402A PT Chart

°F / psig · Safety class A1 · Zeotropic blend (low glide)

refrigerantptchart.com

°F	Liquid	Vapor
-40	7.4	5.7
-39	8.0	6.2
-38	8.5	6.8
-37	9.1	7.3
-36	9.7	7.8
-35	10.3	8.4
-34	10.9	9.0
-33	11.5	9.6
-32	12.1	10.2
-31	12.7	10.8
-30	13.4	11.4
-29	14.0	12.0
-28	14.7	12.6
-27	15.4	13.3
-26	16.1	14.0
-25	16.8	14.6
-24	17.5	15.3
-23	18.2	16.0
-22	19.0	16.7
-21	19.7	17.4
-20	20.5	18.2
-19	21.2	18.9
-18	22.0	19.7
-17	22.8	20.5
-16	23.7	21.3
-15	24.5	22.1
-14	25.3	22.9
-13	26.2	23.7
-12	27.1	24.6
-11	28.0	25.4
-10	28.9	26.3
-9	29.8	27.2
-8	30.7	28.1
-7	31.7	29.0
-6	32.6	29.9
-5	33.6	30.9
-4	34.6	31.8
-3	35.6	32.8
-2	36.6	33.8
-1	37.7	34.8
0	38.7	35.8
1	39.8	36.9
2	40.9	37.9
3	42.0	39.0
4	43.1	40.1
5	44.2	41.2
6	45.4	42.3

°F	Liquid	Vapor
7	46.6	43.4
8	47.7	44.6
9	49.0	45.8
10	50.2	46.9
11	51.4	48.2
12	52.7	49.4
13	53.9	50.6
14	55.2	51.9
15	56.6	53.2
16	57.9	54.5
17	59.2	55.8
18	60.6	57.1
19	62.0	58.5
20	63.4	59.8
21	64.8	61.2
22	66.3	62.6
23	67.7	64.1
24	69.2	65.5
25	70.7	67.0
26	72.2	68.5
27	73.8	70.0
28	75.4	71.5
29	76.9	73.1
30	78.5	74.7
31	80.2	76.3
32	81.8	77.9
33	83.5	79.5
34	85.2	81.2
35	86.9	82.8
36	88.6	84.5
37	90.4	86.3
38	92.2	88.0
39	94.0	89.8
40	95.8	91.6
41	97.7	93.4
42	99.5	95.2
43	101.4	97.1
44	103.3	99.0
45	105.3	100.9
46	107.2	102.8
47	109.2	104.8
48	111.2	106.8
49	113.3	108.8
50	115.3	110.8
51	117.4	112.9
52	119.5	114.9
53	121.7	117.0

°F	Liquid	Vapor
54	123.8	119.2
55	126.0	121.3
56	128.3	123.5
57	130.5	125.7
58	132.8	128.0
59	135.0	130.2
60	137.4	132.5
61	139.7	134.8
62	142.1	137.2
63	144.5	139.5
64	146.9	141.9
65	149.4	144.4
66	151.8	146.8
67	154.4	149.3
68	156.9	151.8
69	159.5	154.3
70	162.1	156.9
71	164.7	159.5
72	167.3	162.1
73	170.0	164.8
74	172.7	167.5
75	175.5	170.2
76	178.2	172.9
77	181.0	175.7
78	183.9	178.5
79	186.7	181.3
80	189.6	184.2
81	192.5	187.1
82	195.5	190.0
83	198.5	193.0
84	201.5	196.0
85	204.5	199.0
86	207.6	202.0
87	210.7	205.1
88	213.9	208.3
89	217.0	211.4
90	220.2	214.6
91	223.5	217.8
92	226.8	221.1
93	230.1	224.4
94	233.4	227.7
95	236.8	231.0
96	240.2	234.4
97	243.6	237.9
98	247.1	241.3
99	250.6	244.8
100	254.2	248.4

°F	Liquid	Vapor
101	257.8	251.9
102	261.4	255.5
103	265.0	259.2
104	268.7	262.8
105	272.5	266.6
106	276.2	270.3
107	280.0	274.1
108	283.9	277.9
109	287.7	281.8
110	291.7	285.7
111	295.6	289.6
112	299.6	293.6
113	303.6	297.6
114	307.7	301.7
115	311.8	305.8
116	315.9	309.9
117	320.1	314.1
118	324.3	318.3
119	328.6	322.6
120	332.9	326.9
121	337.3	331.2
122	341.6	335.6
123	346.1	340.0
124	350.5	344.5
125	355.0	349.0
126	359.6	353.6
127	364.2	358.2
128	368.8	362.8
129	373.5	367.5
130	378.2	372.2
131	383.0	377.0
132	387.8	381.8
133	392.6	386.6
134	397.5	391.5
135	402.4	396.5
136	407.4	401.5
137	412.4	406.5
138	417.5	411.6
139	422.6	416.8
140	427.8	421.9
141	433.0	427.2
142	438.2	432.4
143	443.5	437.8
144	448.9	443.1
145	454.3	448.5

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-402A PT Chart

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

refrigerantptchart.com

°C	Liquid	Vapor
-40	51.3	39.4
-39	58.1	45.9
-38	65.1	52.6
-37	72.4	59.5
-36	80.0	66.7
-35	87.8	74.2
-34	95.8	81.9
-33	104.1	89.8
-32	112.7	98.1
-31	121.5	106.5
-30	130.7	115.3
-29	140.1	124.4
-28	149.8	133.7
-27	159.8	143.3
-26	170.1	153.2
-25	180.7	163.5
-24	191.6	174.0
-23	202.8	184.8
-22	214.4	196.0
-21	226.3	207.5
-20	238.5	219.4
-19	251.1	231.6
-18	264.0	244.1
-17	277.3	257.0
-16	291.0	270.2
-15	305.0	283.9
-14	319.4	297.8
-13	334.2	312.2
-12	349.3	327.0
-11	364.9	342.1
-10	380.9	357.7
-9	397.2	373.7
-8	414.0	390.1
-7	431.2	406.9
-6	448.9	424.1

°C	Liquid	Vapor
-5	467.0	441.8
-4	485.5	459.9
-3	504.5	478.4
-2	523.9	497.4
-1	543.8	516.9
0	564.2	536.9
1	585.0	557.3
2	606.3	578.2
3	628.1	599.6
4	650.5	621.6
5	673.3	644.0
6	696.6	666.9
7	720.5	690.4
8	744.9	714.4
9	769.8	738.9
10	795.3	764.0
11	821.3	789.6
12	847.9	815.8
13	875.1	842.6
14	902.8	869.9
15	931.1	897.9
16	960.0	926.4
17	989.5	955.5
18	1019.7	985.3
19	1050.4	1015.7
20	1081.7	1046.7
21	1113.7	1078.3
22	1146.3	1110.6
23	1179.6	1143.5
24	1213.5	1177.1
25	1248.1	1211.4
26	1283.4	1246.3
27	1319.4	1281.9
28	1356.0	1318.3
29	1393.3	1355.3

°C	Liquid	Vapor
30	1431.4	1393.1
31	1470.2	1431.6
32	1509.7	1470.8
33	1549.9	1510.8
34	1590.9	1551.5
35	1632.6	1593.0
36	1675.1	1635.2
37	1718.3	1678.3
38	1762.4	1722.1
39	1807.2	1766.8
40	1852.9	1812.2
41	1899.3	1858.5
42	1946.6	1905.7
43	1994.7	1953.6
44	2043.6	2002.4
45	2093.4	2052.1
46	2144.1	2102.7
47	2195.6	2154.2
48	2248.0	2206.5
49	2301.3	2259.8
50	2355.5	2314.0
51	2410.6	2369.1
52	2466.6	2425.2
53	2523.6	2482.2
54	2581.5	2540.2
55	2640.4	2599.1
56	2700.2	2659.1
57	2761.0	2720.1
58	2822.8	2782.1
59	2885.7	2845.1
60	2949.5	2909.1
61	3014.3	2974.2
62	3080.2	3040.4

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-402A chart

This R-402A 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 and supplier charts (Honeywell, Arkema, National Refrigerants). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-402A pressure at 40 °F?

91.6 psig vapor (dew) and 95.8 psig liquid (bubble) at saturation, from the table above.

What is the R-402A pressure at 100 °F?

248.4 psig vapor (dew) and 254.2 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-402A has 2.33 °F of glide at a 40 °F evaporator, so the two columns differ.

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R-402A PT Chart

PT lookup

R-402A pressure temperature table

How to use

About this R-402A chart

FAQ

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