R-450A PT Chart

R-450A saturation pressure, −9 to 150 °F−22 to 65 °C. Used in medium-temperature R-134a replacement.

How to use ↓

Safety class A1Zeotropic blend (low glide)Glide 1.17 °F at 40 °F evapGlide 0.65 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-450A 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 −9 to 150 °F−22 to 65 °C only: the published manufacturer data stops there, and the table is not extrapolated past it.

R-450A saturation pressure by temperature, °F and psig (vacuum in inches of mercury)
°F	Liquid bubble, psig	Vapor dew, psig
-9	0.4	0.0
-8	0.7	0.3
-7	1.1	0.7
-6	1.5	1.1
-5	1.9	1.5
-4	2.3	1.9
-3	2.7	2.3
-2	3.2	2.7
-1	3.6	3.1
0	4.0	3.5
1	4.5	4.0
2	4.9	4.4
3	5.4	4.9
4	5.9	5.3
5	6.3	5.8
6	6.8	6.3
7	7.3	6.8
8	7.8	7.3
9	8.3	7.8
10	8.9	8.3
11	9.4	8.8
12	9.9	9.3
13	10.5	9.9
14	11.1	10.4
15	11.6	11.0
16	12.2	11.6
17	12.8	12.1
18	13.4	12.7
19	14.0	13.3
20	14.6	13.9
21	15.3	14.5
22	15.9	15.2
23	16.6	15.8
24	17.2	16.5
25	17.9	17.1
26	18.6	17.8
27	19.3	18.5
28	20.0	19.2
29	20.7	19.9
30	21.4	20.6
31	22.2	21.3
32	22.9	22.1
33	23.7	22.8
34	24.5	23.6
35	25.3	24.3
36	26.1	25.1
37	26.9	25.9
38	27.7	26.7
39	28.5	27.6
40	29.4	28.4
41	30.2	29.2
42	31.1	30.1
43	32.0	31.0
44	32.9	31.9
45	33.8	32.8
46	34.8	33.7
47	35.7	34.6
48	36.7	35.5
49	37.6	36.5
50	38.6	37.4
51	39.6	38.4
52	40.6	39.4
53	41.6	40.4
54	42.7	41.5
55	43.7	42.5
56	44.8	43.5
57	45.9	44.6
58	47.0	45.7
59	48.1	46.8
60	49.2	47.9
61	50.4	49.0
62	51.5	50.2
63	52.7	51.3
64	53.9	52.5
65	55.1	53.7
66	56.3	54.9
67	57.6	56.1
68	58.8	57.3
69	60.1	58.6
70	61.4	59.9
71	62.7	61.2
72	64.0	62.5
73	65.4	63.8
74	66.7	65.1
75	68.1	66.5
76	69.5	67.8
77	70.9	69.2
78	72.3	70.6
79	73.8	72.1
80	75.2	73.5
81	76.7	75.0
82	78.2	76.4
83	79.7	77.9
84	81.3	79.5
85	82.8	81.0
86	84.4	82.5
87	86.0	84.1
88	87.6	85.7
89	89.2	87.3
90	90.9	88.9
91	92.5	90.6
92	94.2	92.3
93	95.9	93.9
94	97.7	95.7
95	99.4	97.4
96	101.2	99.1
97	103.0	100.9
98	104.8	102.7
99	106.6	104.5
100	108.5	106.3
101	110.3	108.2
102	112.2	110.1
103	114.1	112.0
104	116.1	113.9
105	118.0	115.8
106	120.0	117.8
107	122.0	119.8
108	124.1	121.8
109	126.1	123.8
110	128.2	125.8
111	130.3	127.9
112	132.4	130.0
113	134.5	132.1
114	136.7	134.3
115	138.9	136.4
116	141.1	138.6
117	143.3	140.8
118	145.6	143.1
119	147.9	145.3
120	150.2	147.6
121	152.5	149.9
122	154.8	152.3
123	157.2	154.6
124	159.6	157.0
125	162.1	159.4
126	164.5	161.8
127	167.0	164.3
128	169.5	166.8
129	172.0	169.3
130	174.6	171.8
131	177.2	174.4
132	179.8	177.0
133	182.4	179.6
134	185.1	182.2
135	187.8	184.9
136	190.5	187.6
137	193.2	190.3
138	196.0	193.1
139	198.8	195.9
140	201.6	198.7
141	204.5	201.5
142	207.4	204.4
143	210.3	207.3
144	213.2	210.2
145	216.2	213.2
146	219.2	216.1
147	222.3	219.1
148	225.3	222.2
149	228.4	225.3
150	231.5	228.4

R-450A saturation pressure by temperature, °C and kPa (negative = vacuum)
°C	Liquid bubble, kPa	Vapor dew, kPa
-22	6.1	3.4
-21	11.0	8.1
-20	16.0	13.0
-19	21.1	18.0
-18	26.5	23.3
-17	32.0	28.7
-16	37.7	34.3
-15	43.7	40.0
-14	49.8	46.0
-13	56.1	52.2
-12	62.6	58.5
-11	69.3	65.1
-10	76.2	71.9
-9	83.3	78.9
-8	90.7	86.1
-7	98.3	93.5
-6	106.1	101.1
-5	114.1	109.0
-4	122.4	117.1
-3	130.9	125.5
-2	139.7	134.1
-1	148.8	142.9
0	158.0	152.1
1	167.6	161.4
2	177.4	171.0
3	187.5	180.9
4	197.9	191.1
5	208.5	201.6
6	219.5	212.3
7	230.7	223.3
8	242.2	234.7
9	254.0	246.3
10	266.2	258.2
11	278.6	270.4
12	291.4	283.0
13	304.5	295.9
14	317.9	309.1
15	331.7	322.6
16	345.8	336.5
17	360.2	350.7
18	375.0	365.2
19	390.1	380.1
20	405.6	395.4
21	421.5	411.0
22	437.7	427.0
23	454.4	443.4
24	471.4	460.2
25	488.8	477.3
26	506.6	494.9
27	524.7	512.8
28	543.3	531.2
29	562.4	549.9
30	581.8	569.1
31	601.6	588.7
32	621.9	608.7
33	642.6	629.2
34	663.8	650.1
35	685.4	671.4
36	707.5	693.2
37	730.0	715.5
38	753.0	738.2
39	776.4	761.4
40	800.4	785.1
41	824.8	809.3
42	849.7	833.9
43	875.1	859.1
44	901.1	884.8
45	927.5	910.9
46	954.5	937.6
47	982.0	964.9
48	1010.0	992.6
49	1038.5	1020.9
50	1067.6	1049.7
51	1097.3	1079.1
52	1127.5	1109.1
53	1158.3	1139.6
54	1189.6	1170.7
55	1221.6	1202.4
56	1254.1	1234.7
57	1287.3	1267.6
58	1321.0	1301.1
59	1355.3	1335.2
60	1390.3	1369.9
61	1425.9	1405.2
62	1462.1	1441.2
63	1499.0	1477.9
64	1536.6	1515.1
65	1574.8	1553.1

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R-450A PT Chart

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

refrigerantptchart.com

°F	Liquid	Vapor
-9	0.4	0.0
-8	0.7	0.3
-7	1.1	0.7
-6	1.5	1.1
-5	1.9	1.5
-4	2.3	1.9
-3	2.7	2.3
-2	3.2	2.7
-1	3.6	3.1
0	4.0	3.5
1	4.5	4.0
2	4.9	4.4
3	5.4	4.9
4	5.9	5.3
5	6.3	5.8
6	6.8	6.3
7	7.3	6.8
8	7.8	7.3
9	8.3	7.8
10	8.9	8.3
11	9.4	8.8
12	9.9	9.3
13	10.5	9.9
14	11.1	10.4
15	11.6	11.0
16	12.2	11.6
17	12.8	12.1
18	13.4	12.7
19	14.0	13.3
20	14.6	13.9
21	15.3	14.5
22	15.9	15.2
23	16.6	15.8
24	17.2	16.5
25	17.9	17.1
26	18.6	17.8
27	19.3	18.5
28	20.0	19.2
29	20.7	19.9
30	21.4	20.6

°F	Liquid	Vapor
31	22.2	21.3
32	22.9	22.1
33	23.7	22.8
34	24.5	23.6
35	25.3	24.3
36	26.1	25.1
37	26.9	25.9
38	27.7	26.7
39	28.5	27.6
40	29.4	28.4
41	30.2	29.2
42	31.1	30.1
43	32.0	31.0
44	32.9	31.9
45	33.8	32.8
46	34.8	33.7
47	35.7	34.6
48	36.7	35.5
49	37.6	36.5
50	38.6	37.4
51	39.6	38.4
52	40.6	39.4
53	41.6	40.4
54	42.7	41.5
55	43.7	42.5
56	44.8	43.5
57	45.9	44.6
58	47.0	45.7
59	48.1	46.8
60	49.2	47.9
61	50.4	49.0
62	51.5	50.2
63	52.7	51.3
64	53.9	52.5
65	55.1	53.7
66	56.3	54.9
67	57.6	56.1
68	58.8	57.3
69	60.1	58.6
70	61.4	59.9

°F	Liquid	Vapor
71	62.7	61.2
72	64.0	62.5
73	65.4	63.8
74	66.7	65.1
75	68.1	66.5
76	69.5	67.8
77	70.9	69.2
78	72.3	70.6
79	73.8	72.1
80	75.2	73.5
81	76.7	75.0
82	78.2	76.4
83	79.7	77.9
84	81.3	79.5
85	82.8	81.0
86	84.4	82.5
87	86.0	84.1
88	87.6	85.7
89	89.2	87.3
90	90.9	88.9
91	92.5	90.6
92	94.2	92.3
93	95.9	93.9
94	97.7	95.7
95	99.4	97.4
96	101.2	99.1
97	103.0	100.9
98	104.8	102.7
99	106.6	104.5
100	108.5	106.3
101	110.3	108.2
102	112.2	110.1
103	114.1	112.0
104	116.1	113.9
105	118.0	115.8
106	120.0	117.8
107	122.0	119.8
108	124.1	121.8
109	126.1	123.8
110	128.2	125.8

°F	Liquid	Vapor
111	130.3	127.9
112	132.4	130.0
113	134.5	132.1
114	136.7	134.3
115	138.9	136.4
116	141.1	138.6
117	143.3	140.8
118	145.6	143.1
119	147.9	145.3
120	150.2	147.6
121	152.5	149.9
122	154.8	152.3
123	157.2	154.6
124	159.6	157.0
125	162.1	159.4
126	164.5	161.8
127	167.0	164.3
128	169.5	166.8
129	172.0	169.3
130	174.6	171.8
131	177.2	174.4
132	179.8	177.0
133	182.4	179.6
134	185.1	182.2
135	187.8	184.9
136	190.5	187.6
137	193.2	190.3
138	196.0	193.1
139	198.8	195.9
140	201.6	198.7
141	204.5	201.5
142	207.4	204.4
143	210.3	207.3
144	213.2	210.2
145	216.2	213.2
146	219.2	216.1
147	222.3	219.1
148	225.3	222.2
149	228.4	225.3
150	231.5	228.4

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-450A PT Chart

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

refrigerantptchart.com

°C	Liquid	Vapor
-22	6.1	3.4
-21	11.0	8.1
-20	16.0	13.0
-19	21.1	18.0
-18	26.5	23.3
-17	32.0	28.7
-16	37.7	34.3
-15	43.7	40.0
-14	49.8	46.0
-13	56.1	52.2
-12	62.6	58.5
-11	69.3	65.1
-10	76.2	71.9
-9	83.3	78.9
-8	90.7	86.1
-7	98.3	93.5
-6	106.1	101.1
-5	114.1	109.0
-4	122.4	117.1
-3	130.9	125.5
-2	139.7	134.1
-1	148.8	142.9
0	158.0	152.1
1	167.6	161.4
2	177.4	171.0
3	187.5	180.9
4	197.9	191.1
5	208.5	201.6
6	219.5	212.3
7	230.7	223.3

°C	Liquid	Vapor
8	242.2	234.7
9	254.0	246.3
10	266.2	258.2
11	278.6	270.4
12	291.4	283.0
13	304.5	295.9
14	317.9	309.1
15	331.7	322.6
16	345.8	336.5
17	360.2	350.7
18	375.0	365.2
19	390.1	380.1
20	405.6	395.4
21	421.5	411.0
22	437.7	427.0
23	454.4	443.4
24	471.4	460.2
25	488.8	477.3
26	506.6	494.9
27	524.7	512.8
28	543.3	531.2
29	562.4	549.9
30	581.8	569.1
31	601.6	588.7
32	621.9	608.7
33	642.6	629.2
34	663.8	650.1
35	685.4	671.4
36	707.5	693.2
37	730.0	715.5

°C	Liquid	Vapor
38	753.0	738.2
39	776.4	761.4
40	800.4	785.1
41	824.8	809.3
42	849.7	833.9
43	875.1	859.1
44	901.1	884.8
45	927.5	910.9
46	954.5	937.6
47	982.0	964.9
48	1010.0	992.6
49	1038.5	1020.9
50	1067.6	1049.7
51	1097.3	1079.1
52	1127.5	1109.1
53	1158.3	1139.6
54	1189.6	1170.7
55	1221.6	1202.4
56	1254.1	1234.7
57	1287.3	1267.6
58	1321.0	1301.1
59	1355.3	1335.2
60	1390.3	1369.9
61	1425.9	1405.2
62	1462.1	1441.2
63	1499.0	1477.9
64	1536.6	1515.1
65	1574.8	1553.1

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-450A chart

This R-450A 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 charts (Honeywell). Reference only: always verify with the manufacturer’s data and your gauges.

FAQ

What is the R-450A pressure at 40 °F?

28.4 psig vapor (dew) and 29.4 psig liquid (bubble) at saturation, from the table above.

What is the R-450A pressure at 100 °F?

106.3 psig vapor (dew) and 108.5 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-450A has 1.17 °F of glide at a 40 °F evaporator, so the two columns differ.

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R-450A PT Chart

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R-450A pressure temperature table

How to use

About this R-450A chart

FAQ

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