R-290 PT Chart

R-290 saturation pressure, −40 to 150 °F−40 to 65 °C. Used in self-contained commercial cases and small A/C units.

How to use ↓

Safety class A3Single component (hydrocarbon)No glideNo glide

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-290 pressure temperature table

Highlighted: 40 °F and 100 °F.Negative kPa = vacuum. Highlighted: 4 °C and 38 °C.

R-290 saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Pressure psig
-40	1.4
-39	1.8
-38	2.2
-37	2.6
-36	3.0
-35	3.4
-34	3.9
-33	4.3
-32	4.8
-31	5.2
-30	5.7
-29	6.1
-28	6.6
-27	7.1
-26	7.6
-25	8.1
-24	8.6
-23	9.1
-22	9.6
-21	10.2
-20	10.7
-19	11.3
-18	11.8
-17	12.4
-16	13.0
-15	13.6
-14	14.2
-13	14.8
-12	15.4
-11	16.1
-10	16.7
-9	17.4
-8	18.0
-7	18.7
-6	19.4
-5	20.1
-4	20.8
-3	21.5
-2	22.2
-1	22.9
0	23.7
1	24.5
2	25.2
3	26.0
4	26.8
5	27.6
6	28.4
7	29.2
8	30.1
9	30.9
10	31.8
11	32.7
12	33.6
13	34.5
14	35.4
15	36.3
16	37.2
17	38.2
18	39.2
19	40.1
20	41.1
21	42.1
22	43.2
23	44.2
24	45.2
25	46.3
26	47.4
27	48.5
28	49.6
29	50.7
30	51.8
31	53.0
32	54.1
33	55.3
34	56.5
35	57.7
36	58.9
37	60.1
38	61.4
39	62.7
40	63.9
41	65.2
42	66.5
43	67.9
44	69.2
45	70.6
46	72.0
47	73.4
48	74.8
49	76.2
50	77.6
51	79.1
52	80.6
53	82.1
54	83.6
55	85.1
56	86.7
57	88.2
58	89.8
59	91.4
60	93.0
61	94.7
62	96.3
63	98.0
64	99.7
65	101.4
66	103.1
67	104.9
68	106.6
69	108.4
70	110.2
71	112.0
72	113.9
73	115.7
74	117.6
75	119.5
76	121.4
77	123.4
78	125.4
79	127.3
80	129.3
81	131.4
82	133.4
83	135.5
84	137.6
85	139.7
86	141.8
87	143.9
88	146.1
89	148.3
90	150.5
91	152.8
92	155.0
93	157.3
94	159.6
95	161.9
96	164.3
97	166.7
98	169.1
99	171.5
100	173.9
101	176.4
102	178.9
103	181.4
104	183.9
105	186.5
106	189.1
107	191.7
108	194.3
109	197.0
110	199.6
111	202.4
112	205.1
113	207.8
114	210.6
115	213.4
116	216.3
117	219.1
118	222.0
119	224.9
120	227.8
121	230.8
122	233.8
123	236.8
124	239.9
125	242.9
126	246.0
127	249.1
128	252.3
129	255.5
130	258.7
131	261.9
132	265.2
133	268.5
134	271.8
135	275.1
136	278.5
137	281.9
138	285.4
139	288.8
140	292.3
141	295.8
142	299.4
143	303.0
144	306.6
145	310.2
146	313.9
147	317.6
148	321.4
149	325.1
150	328.9

R-290 saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Pressure kPa
-40	9.8
-39	14.7
-38	19.7
-37	24.9
-36	30.3
-35	35.9
-34	41.6
-33	47.6
-32	53.7
-31	60.0
-30	66.5
-29	73.2
-28	80.1
-27	87.2
-26	94.6
-25	102.1
-24	109.9
-23	117.9
-22	126.1
-21	134.5
-20	143.2
-19	152.1
-18	161.3
-17	170.7
-16	180.4
-15	190.3
-14	200.5
-13	210.9
-12	221.7
-11	232.7
-10	244.0
-9	255.5
-8	267.4
-7	279.5
-6	292.0
-5	304.7
-4	317.8
-3	331.1
-2	344.8
-1	358.8
0	373.1
1	387.8
2	402.8
3	418.1
4	433.8
5	449.8
6	466.2
7	482.9
8	500.0
9	517.4
10	535.3
11	553.5
12	572.1
13	591.1
14	610.4
15	630.2
16	650.4
17	670.9
18	691.9
19	713.3
20	735.1
21	757.4
22	780.1
23	803.2
24	826.7
25	850.7
26	875.2
27	900.1
28	925.5
29	951.4
30	977.7
31	1004.5
32	1031.8
33	1059.5
34	1087.8
35	1116.6
36	1145.8
37	1175.6
38	1205.9
39	1236.7
40	1268.1
41	1300.0
42	1332.4
43	1365.4
44	1398.9
45	1433.0
46	1467.6
47	1502.9
48	1538.6
49	1575.0
50	1612.0
51	1649.5
52	1687.7
53	1726.5
54	1765.8
55	1805.8
56	1846.5
57	1887.7
58	1929.7
59	1972.2
60	2015.4
61	2059.3
62	2103.9
63	2149.1
64	2195.0
65	2241.6

Back to the lookup ↑

R-290 PT Chart

°F / psig · Safety class A3 · Single component (hydrocarbon)

refrigerantptchart.com

°F	psig
-40	1.4
-39	1.8
-38	2.2
-37	2.6
-36	3.0
-35	3.4
-34	3.9
-33	4.3
-32	4.8
-31	5.2
-30	5.7
-29	6.1
-28	6.6
-27	7.1
-26	7.6
-25	8.1
-24	8.6
-23	9.1
-22	9.6
-21	10.2
-20	10.7
-19	11.3
-18	11.8
-17	12.4
-16	13.0
-15	13.6
-14	14.2
-13	14.8
-12	15.4
-11	16.1
-10	16.7
-9	17.4
-8	18.0
-7	18.7
-6	19.4
-5	20.1
-4	20.8
-3	21.5
-2	22.2
-1	22.9
0	23.7
1	24.5
2	25.2
3	26.0
4	26.8
5	27.6
6	28.4
7	29.2

°F	psig
8	30.1
9	30.9
10	31.8
11	32.7
12	33.6
13	34.5
14	35.4
15	36.3
16	37.2
17	38.2
18	39.2
19	40.1
20	41.1
21	42.1
22	43.2
23	44.2
24	45.2
25	46.3
26	47.4
27	48.5
28	49.6
29	50.7
30	51.8
31	53.0
32	54.1
33	55.3
34	56.5
35	57.7
36	58.9
37	60.1
38	61.4
39	62.7
40	63.9
41	65.2
42	66.5
43	67.9
44	69.2
45	70.6
46	72.0
47	73.4
48	74.8
49	76.2
50	77.6
51	79.1
52	80.6
53	82.1
54	83.6
55	85.1

°F	psig
56	86.7
57	88.2
58	89.8
59	91.4
60	93.0
61	94.7
62	96.3
63	98.0
64	99.7
65	101.4
66	103.1
67	104.9
68	106.6
69	108.4
70	110.2
71	112.0
72	113.9
73	115.7
74	117.6
75	119.5
76	121.4
77	123.4
78	125.4
79	127.3
80	129.3
81	131.4
82	133.4
83	135.5
84	137.6
85	139.7
86	141.8
87	143.9
88	146.1
89	148.3
90	150.5
91	152.8
92	155.0
93	157.3
94	159.6
95	161.9
96	164.3
97	166.7
98	169.1
99	171.5
100	173.9
101	176.4
102	178.9
103	181.4

°F	psig
104	183.9
105	186.5
106	189.1
107	191.7
108	194.3
109	197.0
110	199.6
111	202.4
112	205.1
113	207.8
114	210.6
115	213.4
116	216.3
117	219.1
118	222.0
119	224.9
120	227.8
121	230.8
122	233.8
123	236.8
124	239.9
125	242.9
126	246.0
127	249.1
128	252.3
129	255.5
130	258.7
131	261.9
132	265.2
133	268.5
134	271.8
135	275.1
136	278.5
137	281.9
138	285.4
139	288.8
140	292.3
141	295.8
142	299.4
143	303.0
144	306.6
145	310.2
146	313.9
147	317.6
148	321.4
149	325.1
150	328.9

Bold rows: 40 °F and 100 °F. Reference only: always verify with the manufacturer’s data and your gauges.

R-290 PT Chart

°C / kPa (gauge) · Safety class A3 · Single component (hydrocarbon)

refrigerantptchart.com

°C	kPa
-40	9.8
-39	14.7
-38	19.7
-37	24.9
-36	30.3
-35	35.9
-34	41.6
-33	47.6
-32	53.7
-31	60.0
-30	66.5
-29	73.2
-28	80.1
-27	87.2
-26	94.6
-25	102.1
-24	109.9
-23	117.9
-22	126.1
-21	134.5
-20	143.2
-19	152.1
-18	161.3
-17	170.7
-16	180.4
-15	190.3
-14	200.5
-13	210.9
-12	221.7
-11	232.7
-10	244.0
-9	255.5
-8	267.4
-7	279.5
-6	292.0
-5	304.7

°C	kPa
-4	317.8
-3	331.1
-2	344.8
-1	358.8
0	373.1
1	387.8
2	402.8
3	418.1
4	433.8
5	449.8
6	466.2
7	482.9
8	500.0
9	517.4
10	535.3
11	553.5
12	572.1
13	591.1
14	610.4
15	630.2
16	650.4
17	670.9
18	691.9
19	713.3
20	735.1
21	757.4
22	780.1
23	803.2
24	826.7
25	850.7
26	875.2
27	900.1
28	925.5
29	951.4
30	977.7
31	1004.5

°C	kPa
32	1031.8
33	1059.5
34	1087.8
35	1116.6
36	1145.8
37	1175.6
38	1205.9
39	1236.7
40	1268.1
41	1300.0
42	1332.4
43	1365.4
44	1398.9
45	1433.0
46	1467.6
47	1502.9
48	1538.6
49	1575.0
50	1612.0
51	1649.5
52	1687.7
53	1726.5
54	1765.8
55	1805.8
56	1846.5
57	1887.7
58	1929.7
59	1972.2
60	2015.4
61	2059.3
62	2103.9
63	2149.1
64	2195.0
65	2241.6

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-290 chart

This R-290 pressure temperature chart gives the saturation pressure for every degree, in psig with °F or kPa (gauge) with °C.

Source: supplier charts (A-Gas, National Refrigerants), checked against NIST. Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-290 pressure at 40 °F?

63.9 psig at saturation, from the table above.

What is the R-290 pressure at 100 °F?

173.9 psig at saturation.

Does R-290 have glide?

No. R-290 is a single-component refrigerant, so one saturation pressure works for both superheat and subcooling.

R-290 PT Chart

PT lookup

R-290 pressure temperature table

How to use

About this R-290 chart

FAQ

Related