Refrigerant PT Chart (R-410A, R-32, R-454B, R-22, R-134a)

Saturation pressures from −40 °F to 150 °F and −40 °C to 60 °C, from the reference equations of state and checked against manufacturers’ charts. Blends with glide have separate liquid (bubble) and vapour (dew) columns.

Standards and method

Pressures are calculated from the reference equations of state (R-454B transcribed from the manufacturer) and cross-checked against a second manufacturer’s chart; no values are typed in except the R-454B data.

Maintained by Miguel Coelho. Updated 9 November 2026. See our editorial policy.

Printable refrigerant PT chart

Saturation pressure–temperature tables for R-22, R-32, R-134a, R-290, R-404A, R-407C, R-410A and R-454B. Includes the exact definition, formulas, a worked example and sources. Conversion values are checked against the defining constants, and reference data is cited to its source, before the PDF is published.

Free to print, share and use in teaching materials with attribution (CC BY 4.0).

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Full refrigerant PT chart

Saturation pressure–temperature tables for R-22, R-32, R-134a, R-290, R-404A, R-407C, R-410A and R-454B. These are the same tables as the printable PDF. For: HVAC and refrigeration technicians, engineers, apprentices and trainers.

Basis: Saturation pressure at each temperature; liquid (bubble) and vapour (dew) for blends with glide
Key relationship: Superheat = suction-line temp − dew temp; subcooling = bubble temp − liquid-line temp
Reading the table: Find the gauge pressure in the column, read the saturation temperature in the first column
Worked example: R-410A at 40 °F: 118.8 psig, so a suction line at 50 °F has 10 °F superheat
Rounding: psig to 0.1 at sea level (14.696 psia); bar(g) on 1.01325 bar. ″ vac = inches of mercury below atmospheric.

Single-component and near-azeotropic refrigerants (psig)

R-410A has a glide below 0.5 psi; the liquid value is shown.

Single-component and near-azeotropic refrigerants (psig)
°F	R-22	R-32	R-134a	R-290	R-410A
-40	0.6	11.0	14.8″ vac	1.4	10.8
-35	2.6	14.4	12.5″ vac	3.4	14.1
-30	4.9	18.2	9.8″ vac	5.7	17.8
-25	7.4	22.3	6.9″ vac	8.1	21.9
-20	10.2	26.8	3.7″ vac	10.7	26.3
-15	13.2	31.7	0.1″ vac	13.6	31.2
-10	16.5	37.1	1.9	16.7	36.5
-5	20.1	42.9	4.1	20.1	42.2
0	24.0	49.3	6.5	23.7	48.4
5	28.3	56.1	9.1	27.6	55.2
10	32.8	63.5	11.9	31.8	62.4
15	37.8	71.4	15.0	36.3	70.3
20	43.1	80.0	18.4	41.1	78.7
25	48.8	89.2	22.1	46.3	87.7
30	55.0	99.1	26.1	51.8	97.4
35	61.5	109.7	30.4	57.7	107.7
40	68.6	121.0	35.0	63.9	118.8
45	76.1	133.0	40.1	70.6	130.6
50	84.1	145.8	45.4	77.6	143.1
55	92.6	159.5	51.2	85.1	156.5
60	101.6	174.0	57.4	93.0	170.7
65	111.2	189.5	64.0	101.4	185.8
70	121.4	205.8	71.1	110.2	201.7
75	132.2	223.2	78.7	119.5	218.6
80	143.6	241.5	86.7	129.3	236.5
85	155.7	260.9	95.2	139.7	255.4
90	168.4	281.3	104.3	150.5	275.3
95	181.8	302.9	113.9	161.9	296.4
100	195.9	325.7	124.2	173.9	318.5
105	210.8	349.6	135.0	186.5	341.9
110	226.4	374.9	146.4	199.6	366.5
115	242.8	401.4	158.4	213.4	392.3
120	260.0	429.3	171.2	227.8	419.5
125	278.0	458.7	184.6	242.9	448.0
130	296.9	489.5	198.7	258.7	478.0
135	316.7	521.8	213.6	275.1	509.5
140	337.4	555.8	229.2	292.3	542.6
145	359.0	591.4	245.7	310.2	577.4
150	381.7	628.8	262.9	328.9	613.9

Blends with glide: liquid and vapour pressure (psig)

Use the vapour (dew) pressure for superheat and the liquid (bubble) pressure for subcooling.

Blends with glide: liquid and vapour pressure (psig)
°F	R-404A liquid	R-404A vapour	R-407C liquid	R-407C vapour	R-454B liquid	R-454B vapour
-40	4.9	4.3	2.7	4.6″ vac	9.5	8.4
-35	7.5	6.8	5.1	0.9″ vac	12.7	11.4
-30	10.3	9.6	7.7	1.6	16.2	14.8
-25	13.4	12.7	10.6	3.9	20.1	18.5
-20	16.8	16.0	13.7	6.5	24.3	22.6
-15	20.5	19.7	17.2	9.3	28.9	27.0
-10	24.6	23.6	20.9	12.3	33.9	31.8
-5	28.9	27.9	25.0	15.7	39.4	37.0
0	33.7	32.6	29.5	19.4	45.3	42.7
5	38.8	37.7	34.3	23.5	51.7	48.8
10	44.3	43.1	39.5	27.9	58.5	55.4
15	50.2	49.0	45.2	32.7	66.0	62.6
20	56.6	55.3	51.2	37.9	73.9	70.3
25	63.4	62.1	57.7	43.5	82.5	78.5
30	70.7	69.3	64.7	49.6	91.7	87.4
35	78.6	77.1	72.2	56.1	101.5	96.9
40	86.9	85.4	80.2	63.2	112.0	107.0
45	95.8	94.2	88.8	70.7	123.1	117.8
50	105.3	103.6	97.9	78.8	135.0	129.3
55	115.3	113.6	107.6	87.5	147.7	141.6
60	126.0	124.2	117.9	96.8	161.1	154.6
65	137.3	135.5	128.9	106.7	175.4	168.5
70	149.3	147.4	140.5	117.3	190.5	183.1
75	162.0	160.1	152.8	128.5	206.5	198.7
80	175.4	173.4	165.8	140.5	223.4	215.2
85	189.5	187.5	179.6	153.2	241.2	232.6
90	204.5	202.4	194.1	166.7	260.0	251.0
95	220.2	218.1	209.4	181.0	279.9	270.4
100	236.8	234.7	225.5	196.1	300.8	290.9
105	254.2	252.1	242.4	212.1	322.8	312.5
110	272.6	270.4	260.2	229.0	345.9	335.2
115	291.8	289.7	278.9	246.9	370.2	359.1
120	312.1	309.9	298.6	265.8	395.7	384.3
125	333.4	331.2	319.2	285.6	422.4	410.8
130	355.7	353.6	340.7	306.6	450.5	438.7
135	379.1	377.1	363.3	328.7	479.9	468.0
140	403.7	401.7	387.0	352.0	510.7	498.8
145	429.6	427.7	411.7	376.6	543.0	531.3
150	456.8	455.0	437.5	402.5	576.8	565.4

Single-component and near-azeotropic refrigerants (bar gauge, °C)

Single-component and near-azeotropic refrigerants (bar gauge, °C)
°C	R-22	R-32	R-134a	R-290	R-410A
-40	0.04	0.76	−0.50	0.10	0.74
-35	0.31	1.20	−0.35	0.36	1.18
-30	0.63	1.72	−0.17	0.67	1.69
-25	1.00	2.33	0.05	1.02	2.29
-20	1.44	3.04	0.31	1.43	2.99
-15	1.95	3.87	0.63	1.90	3.80
-10	2.53	4.81	0.99	2.44	4.73
-5	3.20	5.89	1.42	3.05	5.79
0	3.97	7.12	1.91	3.73	6.99
5	4.83	8.50	2.48	4.50	8.35
10	5.80	10.06	3.13	5.35	9.87
15	6.88	11.79	3.87	6.30	11.57
20	8.09	13.73	4.70	7.35	13.46
25	9.43	15.88	5.64	8.51	15.56
30	10.91	18.26	6.69	9.78	17.88
35	12.53	20.89	7.86	11.17	20.43
40	14.32	23.77	9.15	12.68	23.24
45	16.28	26.93	10.59	14.33	26.32
50	18.41	30.40	12.17	16.12	29.70
55	20.74	34.19	13.90	18.06	33.39
60	23.26	38.32	15.80	20.15	37.41

Blends with glide: liquid and vapour pressure (bar gauge, °C)

Blends with glide: liquid and vapour pressure (bar gauge, °C)
°C	R-404A liquid	R-404A vapour	R-407C liquid	R-407C vapour	R-454B liquid	R-454B vapour
-40	0.34	0.30	0.19	−0.16	0.66	0.58
-35	0.67	0.62	0.49	0.08	1.07	0.97
-30	1.06	1.01	0.86	0.37	1.56	1.44
-25	1.52	1.46	1.29	0.72	2.13	1.99
-20	2.06	1.99	1.79	1.13	2.79	2.63
-15	2.67	2.60	2.37	1.62	3.56	3.37
-10	3.38	3.29	3.03	2.18	4.44	4.21
-5	4.18	4.09	3.80	2.84	5.45	5.18
0	5.09	4.99	4.67	3.59	6.59	6.28
5	6.11	6.00	5.65	4.46	7.87	7.52
10	7.26	7.14	6.75	5.44	9.31	8.92
15	8.54	8.42	7.99	6.54	10.92	10.48
20	9.96	9.83	9.36	7.79	12.71	12.22
25	11.53	11.40	10.89	9.19	14.70	14.15
30	13.27	13.13	12.58	10.74	16.89	16.28
35	15.18	15.04	14.44	12.48	19.30	18.64
40	17.28	17.14	16.48	14.40	21.94	21.24
45	19.58	19.43	18.71	16.52	24.84	24.09
50	22.10	21.95	21.15	18.86	28.01	27.22
55	24.84	24.70	23.80	21.44	31.46	30.64
60	27.84	27.70	26.68	24.27	35.21	34.39

Refrigerant notes

Refrigerant notes
Refrigerant	Type	Safety class	Critical temperature	Notes
R-22	HCFC	A1	96.1 °C	Ozone-depleting; new production banned in the US and EU (servicing only)
R-32	HFC	A2L	78.1 °C	Mildly flammable; common in new split air conditioners
R-134a	HFC	A1	101.1 °C	Chillers, older vehicle air conditioning, medium-temperature refrigeration
R-290	Propane (HC)	A3	96.7 °C	Highly flammable: small charges, sealed systems, trained technicians
R-404A	HFC blend	A1	72.1 °C	Low-temperature refrigeration; high GWP, being phased down
R-407C	HFC blend	A1	86.2 °C	Large glide (about 7 °C); R-22 replacement in air conditioning
R-410A	HFC blend	A1	71.3 °C	Near-azeotropic; being replaced by R-32 and R-454B in new equipment
R-454B	HFO/HFC blend	A2L	78.1 °C	Mildly flammable R-410A replacement; glide about 1 °C (1.7 °F)

Sources for this chart

Reference equations of state (as used in NIST REFPROP) — R-22, R-32, R-134a, R-290; Lemmon (2003) pseudo-pure models for R-404A, R-407C and R-410A
CoolProp 8.0 (Bell et al., Ind. Eng. Chem. Res. 2014) — Open-source property library used to evaluate IF97 and the refrigerant equations of state
Chemours, Opteon XL41 (R-454B) thermodynamic properties, I/P units — R-454B liquid and vapour pressures (NIST REFPROP 10)
Arkema, Forane pressure–temperature chart (05-2025) — Second source: every refrigerant agrees within 0.1 psi at 40 °F and 100 °F

Related Converters & Charts

Refrigerant PT Chart (R-410A, R-32, R-454B, R-22, R-134a) FAQs

Common questions about the refrigerant PT chart.

What should R-410A pressure be at 40 °F?

R-410A saturates at 118.8 psig at 40 °F. A suction pressure of 118.8 psig therefore means a 40 °F evaporating temperature; superheat is the suction-line temperature minus 40 °F.

What is the pressure of R-454B at 40 °F?

R-454B is a blend with about 1.7 °F of glide: at 40 °F the liquid (bubble) pressure is 112.0 psig and the vapour (dew) pressure is 107.0 psig.

Which column do I use for superheat and subcooling?

For superheat, convert suction pressure to the vapour (dew) temperature; for subcooling, convert liquid-line pressure to the liquid (bubble) temperature. For single-component refrigerants both are the same.

Can I download this chart as a PDF, CSV, or JSON?

Yes. Use the Download A4 PDF or US Letter PDF buttons for a printable version, or download the same tables as CSV or JSON from the links on this page.