Installation and operations manual – Heatcraft Refrigeration Products PARALLEL COMPRESSOR SYSTEMS 25000102 User Manual
Page 24
24
Part # 25000102
Installation and Operations Manual
For Relief Devices set at 400 psig
• Obtain the capacity at 400 psig setting
• Locate this capacity or the nearest larger capacity in the left-hand column of the discharge piping table above and read across to obtain the maximum lengths
for each tube and pipe size
For relief devices set at 350 psig, use the above table and multiply by .75 to determine maximum lengths
For relief devices set at 425 psig, use the above table and multiply by 1.15 to determine maximum lengths
For relief devices set at 450 psig, use the above table and multiply by 1.25 to determine maximum lengths
Table 17. Henry Relief Valve Capacity Rating
Table 18. Discharge Piping Table
Type
Catalog
Number
Size Connection
Standard Pressure Settings PSIG
Inlet
Outlet
350
400
425
450
Angle
526E
3/8 MPT
3/8 FLARE
10.2
11.6
12.3
13.0
527E
1/2 MPT
5/8 FLARE
28.5
32.4
34.4
36.3
Straight
Through
5231
3/8 MPT
3/8 FLARE
11.2
12.7
13.5
14.3
5231-A
3/8 MPT
1/2 FLARE
18.6
21.1
22.4
23.7
5231
1/2 MPT
5/8 FLARE
18.6
21.1
22.4
23.7
5232
1/2 MPT
5/8 FLARE
28.1
32.0
33.9
35.8
5240-1/2
1/2 MPT
3/4 FPT
41.2
46.8
49.1
52.5
5242-3/4
3/4 MPT
3/4 FPT
41.2
46.8
49.1
52.5
5244-1
1 MPT
1 FPT
74.0
84.2
89.3
94.4
5246-1-1/4
1-1/4 MPT
1-1/4 FPT
129.7
147.5
156.4
165.4
Maximum Length of Discharge Pipe in Feet
* For 400 PSIG Pressure Setting
Relief Device
Capacity
Lbs. Air/Min.
Soft Copper Tube (OD)
Schedule 40 Pipe
3/8”
1/2”
5/8”
1/2”
3/4”
1”
1-1/4”
1-1/2”
2”
10
3-1/2
19-1/4
61
108
445
12
2-1/2
12-1/4
44
75
308
14
2
9-1/2
32
56
228
18
5-1/4
19-1/4
33
137
20
4-1/4
16
28
110
371
25
2-1/2
9-1/2
18
72
238
30
2
7
12
49
165
35
2
5-1/4
9
37
121
40
3-1/2
7
28
93
366
50
2-1/2
4
18
60
233
70
3
9
30
119
257
80
2
7
23
91
198
90
2
5
18
72
156
125
3
10
37
81
282
150
2
7
26
56
196