Pressure Temperature Chart

Last Updated on Thursday, 05 November 2009 04:05 Written by <a href='/jomsocial/62-iamrichard/profile'>Richard</a> Saturday, 01 March 2008 13:11

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Refrigeration Pressure Temperature Chart

PSIG corresponds to refrigeration temperature. Pressure Temperature

Chart represents the most common refrigerants used today.

PSIG	R-22	R-134A	R-410A	PSIG	R-22	R-134A	R-410A
0	-41	-15	-60	78	46	75	20
2	-37	-10	-58	80	48	76	21
4	-32	-5	-54	85	51	79	24
6	-28	-1	-50	90	54	82	26
8	-24	3	-46	95	56	85	29
10	-20	7	-42	100	59	88	32
12	-17	10	-39	105	62	90	34
14	-14	13	-36	110	64	93	36
16	-11	16	-33	115	67	96	39
18	-8	19	-30	120	69	98	41
20	-5	22	-28	125	72	100	43
22	-3	25	-26	130	74	103	45
24	0	27	-24	135	76	105	47
26	2	30	-20	140	78	107	49
28	5	32	-18	145	81	109	51
30	7	35	-16	150	83	112	53
32	9	37	-14	160	87	116	57
34	11	39	-12	170	91	120	60
36	13	41	-10	180	94	123	64
38	15	43	-8	190	98	127	67
40	17	45	-6	200	101	131	70
42	19	47	-4	210	105	134	73
44	21	49	-3	220	108	137	76
46	23	51	-2	225	110	139	78
48	24	52	0	235	113	142	80
50	26	54	1	245	116	145	83
52	28	56	3	255	119	148	85
54	29	57	4	265	121	151	88
56	31	59	6	275	124	153	90
58	32	60	7	285	127	155	92
60	34	62	8	295	130	158	95
62	35	64	10	305	133	161	97
64	37	65	11	325	137	167	101
66	38	66	13	355	144	173	108
68	40	68	14	375	148	177	112
70	41	69	15	405	155	182	118
72	42	71	16	500	173	202	134
74	44	72	17	600	X	X	149
76	45	73	19	700	X	X	159

Tools of the HVAC and Refrigeration Trade

The pressure/temperature chart is a tool which is used by HVACR technicians when they are checking the refrigeration circuit. Refrigeration circuits can be found in air conditioners, heat pumps, refrigerators, freezers, walk-in coolers, walk-in freezers, chillers, process cooling systems, and transport refrigerated trailers. It is necessary to know the coressponding temperature to pressure or the corresponding pressure to the temperature of the systems. These readings, using the PT chart, a set of manifold refrigeration gages, and temperature sensors are used to determine if the unit is properly charge or if there is a problem with the refrigeration circuit. A good HVAC technician can determine of the refrigeration circuit has the proper charge, if there is a problem with the compressor, or if there is a problem with migrating oil in the refrigeration circuit just to name a few of the problems which can be found using the tools of the refrigeration trade. Using proven methods such as the superheat method or subcooling method a problem with the refrigeration system can be determined and action taken to correct the problem. To determine superheat or subcooling, a set of refrigeration gages, a temperature sensing device, and a PT chart is needed. In the hands of a good technician these tools are invaluable at ensuring the system is trouble free and working at optimum levels.

pt chart, pt charts, pressure temperature chart, refrigeration pressure temperature

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iamrichard

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Maintenance Tech
written by Mark, April 08, 2009

I've been asked to give a PM inspection form for our Heat Pump systems. We have a 16 story high rise with split systems. We need a PM list with an estimated time to complete it if we did everything the way it should be done. Then I've been asked to give a general repair time for different minor repairs. Is this something you can help me with? I'd really be appreciative if you could help me. Thx.

Mark