What are the 404a operating pressures? Well, in this guide we provide you with a 404 pt chart which shows the common operating pressures for 404a at different temperatures.

404a Operating Pressure Chart (404a pt chart)

Temp(°F)	Liquid Pressure (psi)	Vapor Pressure (psi)	Temp (°C)
-49	0.9	0.3	-45
-48	1.3	0.7	-44.4
-47	1.7	1.2	-43.9
-46	2.1	1.6	-43.3
-45	2.6	2	-42.8
-44	3	2.4	-42.2
-43	3.5	2.9	-41.7
-42	4	3.4	-41.1
-41	4.4	3.8	-40.6
-40	4.9	4.3	-40
-39	5.4	4.8	-39.4
-38	5.9	5.3	-38.9
-37	6.4	5.8	-38.3
-36	7	6.3	-37.8
-35	7.5	6.8	-37.2
-34	8	7.4	-36.7
-33	8.6	7.9	-36.1
-32	9.2	8.5	-35.6
-31	9.7	9	-35
-30	10.3	9.6	-34.4
-29	10.9	10.2	-33.9
-28	11.5	10.8	-33.3
-27	12.2	11.4	-32.8
-26	12.8	12	-32.2
-25	13.4	12.7	-31.7
-24	14.1	13.3	-31.1
-23	14.8	14	-30.6
-22	15.4	14.6	-30
-21	16.1	15.3	-29.4
-20	16.8	16	-28.9
-19	17.5	16.7	-28.3
-18	18.3	17.4	-27.8
-17	19	18.2	-27.2
-16	19.8	18.9	-26.7
-15	20.5	19.7	-26.1
-14	21.3	20.4	-25.6
-13	22.1	21.2	-25
-12	22.9	22	-24.4
-11	23.7	22.8	-23.9
10	24.6	24.6	-23.3
-9	25.4	24.5	-22.8
-8	26.3	25.3	-22.2
-7	27.1	26.2	-21.7
-6	28	27	-21.1
-5	28.9	27.9	-20.6
-4	29.8	28.8	-20
-3	30.8	29.8	– 19.4
-2	31.7	30.7	– 18.9
-1	32.7	31.6	-18.3
0	33.7	32.6	-17.8
1	34.7	33.6	-17.2
2	35.7	34.6	– 16.7
3	36.7	35.6	– 25.6
4	37.7	36.6	-15.6
5	38.8	37.7	-15
6	39.8	38.7	-14.4
7	40.9	39.8	-13.9
8	42	40.9	-13.3
9	43.1	42	-12.8
10	44.3	43.1	-12.2
11	45.4	44.3	-11.7
12	46.6	45.4	-11.1
13	47.8	46.6	-10.6
14	49	47.8	-10
15	50.2	49	-9.4
16	51.5	50.2	-8.9
17	52.7	51.5	-8.3
18	54	52.7	-7.8
19	55.3	54	-7.2
20	56.6	55.3	-6.7
21	57.9	56.6	-6.1
22	59.3	58	-5.6
23	60.6	59.3	-5
24	62	60.7	-4.4
25	63.4	62.1	-3.9
26	64.8	63.5	-3.3
27	66.3	64.9	-2.8
28	67.8	66.4	-2.2
29	69.2	67.8	-1.7
30	70.7	69.3	-1,1
31	72.3	70.8	-0.6
32	73.8	72.4	0
33	75.4	73.9	0.6
34	77	75.5	1.1
35	78.6	77.1	1.7
36	80.2	78.7	2.2
37	81,8	80.3	2.8
38	83.5	82	3.3
39	85.2	83.7	3.9
40	86.9	85.4	4.4
41	88.6	87.1	5
42	90.4	88.8	5.6
43	92.2	90.6	6.1
44	94	92.4	6.7
45	95.8	94.2	7.2
46	97.6	96	7.8
47	99.5	97.9	8,3
48	101.4	99.8	8.9
49	103.3	101.7	9.4
50	105.3	103.6	10
51	107.2	105.6	10.6
52	109.2	107.6	11.1
53	11.2	109.6	11.7
54	113.3	111.6	12.2
55	115.3	113.6	12.8
56	117.4	115.7	13.3
57	119.5	117.8	13.9
58	121.7	119.9	14.4
59	123.8	122.1	15
60	126	124.2	15.6
61	128.2	126.4	16.1
62	130.5	128.7	16.7
63	132.7	130.9	17.2
64	135	133.2	17.8
65	137.3	135.5	18.3
66	139.7	137.8	18,9
67	142	140.2	19.4
68	144.4	142.6	20
69	146.9	145	20.6
70	149.3	147.4	21.1
71	151.8	149.9	21.7
72	154.3	152.4	22.2
73	156.8	154.9	22.8
74	159.4	157.5	23.3
75	162	160.1	23.9
76	164.6	162.7	24.4
77	167.3	165.3	25
78	170	168	25.6
79	172.7	170.7	26.1
80	175.4	173.4	26.7
81	178.2	176.2	27.2
82	181	179	27.8
83	183.8	181.8	28.3
84	186.7	184.7	28.9
85	189.5	187.5	29.4
86	192.5	190.4	30
87	195.4	193.4	30.6
88	198.4	196.4	31.1
89	201.4	199.4	31.7
90	204.5	202.4	32.2
91	207.6	205.5	32.8
92	210.7	208.6	33.3
93	213.8	211.7	33.9
94	217	214.9	34.4
95	220.2	218.1	35
96	223.4	221.4	35.6
97	226.7	224.6	36.1
98	230	227.9	36.7
99	233.4	231	37.2
100	236.8	234.6	37.8
101	240.2	238.1	38.3
102	243.6	241.5	38.9
103	247.1	245	39.4
104	250.6	248.5	40
105	254.2	252.1	40.5
106	257.8	255.6	41.1
107	261.4	259 .3	41.7
108	265.1	262.9	42.2
109	268.8	266.6	42.8
110	272.5	270.4	43.3
111	276.3	274.1	43.9
112	280.1	278	44.4
113	284	281.8	45
114	287.9	285.7	45.6
115	291.8	289.6	46.1
116	295.8	293.6	46.7
117	299.8	297.6	47.2
118	303.8	301.7	47.8
119	307.9	305.8	48.3
120	312.1	309.9	48.9
121	119.1	3141	494
122	320.4	318.3	50
123	324.7	322.5	50.6
124	329	326.8	51.1
125	333.3	331.2	51.7
126	337.7	335.6	52.2
127	342.1	340	52.8
128	346.6	344.4	53.3
129	351.1	349	53.9
130	355.7	353.5	54.4
131	360.2	35.1	55
132	364.9	362.8	55.6
133	369.6	367.5	56.1
134	374.3	372.2	56.7
135	379.1	377	57.2
136	383.9	381.9	57.8
137	388.8	386.8	58.3
138	393.7	391.7	58.9
139	398.7	396.7	59.4
140	403.7	401.7	60
141	408.8	406.8	60.6
142	413.9	412	61.1
143	419.1	417.1	61.7
144	424.3	422.4	62.2
145	429.6	427.7	62.8
146	434.9	433.1	63.3
147	440.3	438.5	63.9
148	445.8	443.9	64.4
149	451.3	449.5	65
150	456.8	455.1	65.6