R-409A PT Chart

R-409A saturation pressure, −40 to 150 °F−40 to 65 °C. Used in R-12 retrofits in older refrigeration.

How to use ↓

Safety class A1Zeotropic blendGlide 14.39 °F at 40 °F evapGlide 7.99 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-409A 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-409A saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-40	6.7 inHg	14.8 inHg
-39	6.1 inHg	14.4 inHg
-38	5.5 inHg	13.9 inHg
-37	4.9 inHg	13.5 inHg
-36	4.2 inHg	13.0 inHg
-35	3.5 inHg	12.5 inHg
-34	2.9 inHg	12.0 inHg
-33	2.2 inHg	11.5 inHg
-32	1.5 inHg	11.0 inHg
-31	0.7 inHg	10.4 inHg
-30	0.0	9.9 inHg
-29	0.4	9.3 inHg
-28	0.7	8.8 inHg
-27	1.1	8.2 inHg
-26	1.5	7.6 inHg
-25	1.9	7.0 inHg
-24	2.3	6.4 inHg
-23	2.7	5.8 inHg
-22	3.2	5.1 inHg
-21	3.6	4.5 inHg
-20	4.0	3.8 inHg
-19	4.5	3.1 inHg
-18	4.9	2.4 inHg
-17	5.4	1.7 inHg
-16	5.8	1.0 inHg
-15	6.3	0.2 inHg
-14	6.8	0.3
-13	7.3	0.6
-12	7.8	1.0
-11	8.3	1.4
-10	8.8	1.8
-9	9.4	2.2
-8	9.9	2.6
-7	10.5	3.1
-6	11.0	3.5
-5	11.6	3.9
-4	12.2	4.4
-3	12.8	4.9
-2	13.4	5.3
-1	14.0	5.8
0	14.6	6.3
1	15.2	6.8
2	15.8	7.3
3	16.5	7.8
4	17.2	8.3
5	17.8	8.8
6	18.5	9.4
7	19.2	9.9
8	19.9	10.5
9	20.6	11.1
10	21.3	11.6
11	22.1	12.2
12	22.8	12.8
13	23.6	13.4
14	24.3	14.1
15	25.1	14.7
16	25.9	15.3
17	26.7	16.0
18	27.6	16.6
19	28.4	17.3
20	29.2	18.0
21	30.1	18.7
22	30.9	19.4
23	31.8	20.1
24	32.7	20.8
25	33.6	21.6
26	34.5	22.3
27	35.5	23.1
28	36.4	23.9
29	37.4	24.7
30	38.4	25.5
31	39.3	26.3
32	40.3	27.1
33	41.4	27.9
34	42.4	28.8
35	43.4	29.7
36	44.5	30.5
37	45.6	31.4
38	46.6	32.3
39	47.7	33.3
40	48.9	34.2
41	50.0	35.1
42	51.1	36.1
43	52.3	37.1
44	53.5	38.1
45	54.7	39.1
46	55.9	40.1
47	57.1	41.1
48	58.3	42.1
49	59.6	43.2
50	60.9	44.3
51	62.1	45.4
52	63.4	46.5
53	64.8	47.6
54	66.1	48.7
55	67.4	49.9
56	68.8	51.1
57	70.2	52.2
58	71.6	53.4
59	73.0	54.7
60	74.5	55.9
61	75.9	57.1
62	77.4	58.4
63	78.9	59.7
64	80.4	61.0
65	81.9	62.3
66	83.4	63.6
67	85.0	65.0
68	86.6	66.4
69	88.2	67.7
70	89.8	69.1
71	91.4	70.6
72	93.1	72.0
73	94.8	73.5
74	96.4	74.9
75	98.2	76.4
76	99.9	78.0
77	101.6	79.5
78	103.4	81.0
79	105.2	82.6
80	107.0	84.2
81	108.8	85.8
82	110.7	87.4
83	112.5	89.1
84	114.4	90.8
85	116.3	92.4
86	118.3	94.2
87	120.2	95.9
88	122.2	97.6
89	124.2	99.4
90	126.2	101.2
91	128.2	103.0
92	130.3	104.9
93	132.4	106.7
94	134.5	108.6
95	136.6	110.5
96	138.8	112.4
97	140.9	114.4
98	143.1	116.3
99	145.3	118.3
100	147.6	120.3
101	149.8	122.4
102	152.1	124.4
103	154.4	126.5
104	156.7	128.6
105	159.1	130.7
106	161.4	132.9
107	163.8	135.0
108	166.3	137.2
109	168.7	139.5
110	171.2	141.7
111	173.7	144.0
112	176.2	146.3
113	178.7	148.6
114	181.3	150.9
115	183.9	153.3
116	186.5	155.7
117	189.1	158.1
118	191.8	160.6
119	194.5	163.0
120	197.2	165.5
121	199.9	168.1
122	202.7	170.6
123	205.5	173.2
124	208.3	175.8
125	211.1	178.4
126	214.0	181.1
127	216.9	183.8
128	219.8	186.5
129	222.8	189.2
130	225.8	192.0
131	228.8	194.8
132	231.8	197.6
133	234.8	200.5
134	237.9	203.4
135	241.0	206.3
136	244.2	209.2
137	247.4	212.2
138	250.5	215.2
139	253.8	218.2
140	257.0	221.3
141	260.3	224.4
142	263.6	227.5
143	266.9	230.7
144	270.3	233.8
145	273.7	237.1
146	277.1	240.3
147	280.6	243.6
148	284.1	246.9
149	287.6	250.2
150	291.1	253.6

R-409A saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-40	-22.8	-50.2
-39	-19.0	-47.5
-38	-15.1	-44.6
-37	-11.1	-41.7
-36	-6.8	-38.6
-35	-2.5	-35.4
-34	2.0	-32.0
-33	6.7	-28.6
-32	11.5	-25.0
-31	16.6	-21.2
-30	21.7	-17.3
-29	27.1	-13.3
-28	32.6	-9.1
-27	38.3	-4.8
-26	44.3	-0.3
-25	50.4	4.4
-24	56.7	9.2
-23	63.2	14.2
-22	69.9	19.4
-21	76.8	24.8
-20	83.9	30.3
-19	91.2	36.1
-18	98.8	42.0
-17	106.6	48.1
-16	114.6	54.4
-15	122.9	61.0
-14	131.4	67.7
-13	140.1	74.7
-12	149.1	81.9
-11	158.4	89.3
-10	167.9	96.9
-9	177.7	104.8
-8	187.7	112.9
-7	198.0	121.2
-6	208.6	129.8
-5	219.5	138.7
-4	230.6	147.8
-3	242.1	157.2
-2	253.8	166.8
-1	265.8	176.7
0	278.2	186.9
1	290.8	197.4
2	303.8	208.2
3	317.1	219.2
4	330.7	230.6
5	344.7	242.2
6	359.0	254.2
7	373.6	266.5
8	388.6	279.1
9	403.9	292.1
10	419.6	305.3
11	435.6	318.9
12	452.0	332.9
13	468.8	347.2
14	485.9	361.8
15	503.4	376.8
16	521.3	392.2
17	539.6	408.0
18	558.3	424.1
19	577.4	440.6
20	597.0	457.5
21	616.9	474.8
22	637.2	492.5
23	658.0	510.6
24	679.1	529.1
25	700.8	548.0
26	722.8	567.4
27	745.3	587.2
28	768.3	607.4
29	791.7	628.1
30	815.5	649.2
31	839.8	670.8
32	864.6	692.8
33	889.9	715.3
34	915.6	738.3
35	941.9	761.8
36	968.6	785.7
37	995.8	810.2
38	1023.6	835.1
39	1051.8	860.6
40	1080.5	886.6
41	1109.8	913.1
42	1139.6	940.1
43	1169.9	967.7
44	1200.8	995.8
45	1232.2	1024.5
46	1264.1	1053.7
47	1296.6	1083.5
48	1329.7	1113.9
49	1363.3	1144.8
50	1397.5	1176.4
51	1432.3	1208.5
52	1467.6	1241.3
53	1503.6	1274.6
54	1540.1	1308.6
55	1577.3	1343.2
56	1615.0	1378.4
57	1653.3	1414.2
58	1692.3	1450.8
59	1731.9	1487.9
60	1772.1	1525.8
61	1812.9	1564.3
62	1854.4	1603.5
63	1896.6	1643.4
64	1939.4	1684.0
65	1982.8	1725.3

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R-409A PT Chart

°F / psig · Safety class A1 · Zeotropic blend

refrigerantptchart.com

°F	Liquid	Vapor
-40	6.7"	14.8"
-39	6.1"	14.4"
-38	5.5"	13.9"
-37	4.9"	13.5"
-36	4.2"	13.0"
-35	3.5"	12.5"
-34	2.9"	12.0"
-33	2.2"	11.5"
-32	1.5"	11.0"
-31	0.7"	10.4"
-30	0.0	9.9"
-29	0.4	9.3"
-28	0.7	8.8"
-27	1.1	8.2"
-26	1.5	7.6"
-25	1.9	7.0"
-24	2.3	6.4"
-23	2.7	5.8"
-22	3.2	5.1"
-21	3.6	4.5"
-20	4.0	3.8"
-19	4.5	3.1"
-18	4.9	2.4"
-17	5.4	1.7"
-16	5.8	1.0"
-15	6.3	0.2"
-14	6.8	0.3
-13	7.3	0.6
-12	7.8	1.0
-11	8.3	1.4
-10	8.8	1.8
-9	9.4	2.2
-8	9.9	2.6
-7	10.5	3.1
-6	11.0	3.5
-5	11.6	3.9
-4	12.2	4.4
-3	12.8	4.9
-2	13.4	5.3
-1	14.0	5.8
0	14.6	6.3
1	15.2	6.8
2	15.8	7.3
3	16.5	7.8
4	17.2	8.3
5	17.8	8.8
6	18.5	9.4
7	19.2	9.9

°F	Liquid	Vapor
8	19.9	10.5
9	20.6	11.1
10	21.3	11.6
11	22.1	12.2
12	22.8	12.8
13	23.6	13.4
14	24.3	14.1
15	25.1	14.7
16	25.9	15.3
17	26.7	16.0
18	27.6	16.6
19	28.4	17.3
20	29.2	18.0
21	30.1	18.7
22	30.9	19.4
23	31.8	20.1
24	32.7	20.8
25	33.6	21.6
26	34.5	22.3
27	35.5	23.1
28	36.4	23.9
29	37.4	24.7
30	38.4	25.5
31	39.3	26.3
32	40.3	27.1
33	41.4	27.9
34	42.4	28.8
35	43.4	29.7
36	44.5	30.5
37	45.6	31.4
38	46.6	32.3
39	47.7	33.3
40	48.9	34.2
41	50.0	35.1
42	51.1	36.1
43	52.3	37.1
44	53.5	38.1
45	54.7	39.1
46	55.9	40.1
47	57.1	41.1
48	58.3	42.1
49	59.6	43.2
50	60.9	44.3
51	62.1	45.4
52	63.4	46.5
53	64.8	47.6
54	66.1	48.7
55	67.4	49.9

°F	Liquid	Vapor
56	68.8	51.1
57	70.2	52.2
58	71.6	53.4
59	73.0	54.7
60	74.5	55.9
61	75.9	57.1
62	77.4	58.4
63	78.9	59.7
64	80.4	61.0
65	81.9	62.3
66	83.4	63.6
67	85.0	65.0
68	86.6	66.4
69	88.2	67.7
70	89.8	69.1
71	91.4	70.6
72	93.1	72.0
73	94.8	73.5
74	96.4	74.9
75	98.2	76.4
76	99.9	78.0
77	101.6	79.5
78	103.4	81.0
79	105.2	82.6
80	107.0	84.2
81	108.8	85.8
82	110.7	87.4
83	112.5	89.1
84	114.4	90.8
85	116.3	92.4
86	118.3	94.2
87	120.2	95.9
88	122.2	97.6
89	124.2	99.4
90	126.2	101.2
91	128.2	103.0
92	130.3	104.9
93	132.4	106.7
94	134.5	108.6
95	136.6	110.5
96	138.8	112.4
97	140.9	114.4
98	143.1	116.3
99	145.3	118.3
100	147.6	120.3
101	149.8	122.4
102	152.1	124.4
103	154.4	126.5

°F	Liquid	Vapor
104	156.7	128.6
105	159.1	130.7
106	161.4	132.9
107	163.8	135.0
108	166.3	137.2
109	168.7	139.5
110	171.2	141.7
111	173.7	144.0
112	176.2	146.3
113	178.7	148.6
114	181.3	150.9
115	183.9	153.3
116	186.5	155.7
117	189.1	158.1
118	191.8	160.6
119	194.5	163.0
120	197.2	165.5
121	199.9	168.1
122	202.7	170.6
123	205.5	173.2
124	208.3	175.8
125	211.1	178.4
126	214.0	181.1
127	216.9	183.8
128	219.8	186.5
129	222.8	189.2
130	225.8	192.0
131	228.8	194.8
132	231.8	197.6
133	234.8	200.5
134	237.9	203.4
135	241.0	206.3
136	244.2	209.2
137	247.4	212.2
138	250.5	215.2
139	253.8	218.2
140	257.0	221.3
141	260.3	224.4
142	263.6	227.5
143	266.9	230.7
144	270.3	233.8
145	273.7	237.1
146	277.1	240.3
147	280.6	243.6
148	284.1	246.9
149	287.6	250.2
150	291.1	253.6

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-409A PT Chart

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

refrigerantptchart.com

°C	Liquid	Vapor
-40	-22.8	-50.2
-39	-19.0	-47.5
-38	-15.1	-44.6
-37	-11.1	-41.7
-36	-6.8	-38.6
-35	-2.5	-35.4
-34	2.0	-32.0
-33	6.7	-28.6
-32	11.5	-25.0
-31	16.6	-21.2
-30	21.7	-17.3
-29	27.1	-13.3
-28	32.6	-9.1
-27	38.3	-4.8
-26	44.3	-0.3
-25	50.4	4.4
-24	56.7	9.2
-23	63.2	14.2
-22	69.9	19.4
-21	76.8	24.8
-20	83.9	30.3
-19	91.2	36.1
-18	98.8	42.0
-17	106.6	48.1
-16	114.6	54.4
-15	122.9	61.0
-14	131.4	67.7
-13	140.1	74.7
-12	149.1	81.9
-11	158.4	89.3
-10	167.9	96.9
-9	177.7	104.8
-8	187.7	112.9
-7	198.0	121.2
-6	208.6	129.8
-5	219.5	138.7

°C	Liquid	Vapor
-4	230.6	147.8
-3	242.1	157.2
-2	253.8	166.8
-1	265.8	176.7
0	278.2	186.9
1	290.8	197.4
2	303.8	208.2
3	317.1	219.2
4	330.7	230.6
5	344.7	242.2
6	359.0	254.2
7	373.6	266.5
8	388.6	279.1
9	403.9	292.1
10	419.6	305.3
11	435.6	318.9
12	452.0	332.9
13	468.8	347.2
14	485.9	361.8
15	503.4	376.8
16	521.3	392.2
17	539.6	408.0
18	558.3	424.1
19	577.4	440.6
20	597.0	457.5
21	616.9	474.8
22	637.2	492.5
23	658.0	510.6
24	679.1	529.1
25	700.8	548.0
26	722.8	567.4
27	745.3	587.2
28	768.3	607.4
29	791.7	628.1
30	815.5	649.2
31	839.8	670.8

°C	Liquid	Vapor
32	864.6	692.8
33	889.9	715.3
34	915.6	738.3
35	941.9	761.8
36	968.6	785.7
37	995.8	810.2
38	1023.6	835.1
39	1051.8	860.6
40	1080.5	886.6
41	1109.8	913.1
42	1139.6	940.1
43	1169.9	967.7
44	1200.8	995.8
45	1232.2	1024.5
46	1264.1	1053.7
47	1296.6	1083.5
48	1329.7	1113.9
49	1363.3	1144.8
50	1397.5	1176.4
51	1432.3	1208.5
52	1467.6	1241.3
53	1503.6	1274.6
54	1540.1	1308.6
55	1577.3	1343.2
56	1615.0	1378.4
57	1653.3	1414.2
58	1692.3	1450.8
59	1731.9	1487.9
60	1772.1	1525.8
61	1812.9	1564.3
62	1854.4	1603.5
63	1896.6	1643.4
64	1939.4	1684.0
65	1982.8	1725.3

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-409A chart

This R-409A 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 and supplier charts (Honeywell, Arkema, National Refrigerants). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-409A pressure at 40 °F?

34.2 psig vapor (dew) and 48.9 psig liquid (bubble) at saturation, from the table above.

What is the R-409A pressure at 100 °F?

120.3 psig vapor (dew) and 147.6 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-409A has 14.39 °F of glide at a 40 °F evaporator, so the two columns differ.

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R-409A PT Chart

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R-409A pressure temperature table

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About this R-409A chart

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