Capacities | Relief Valves
70
16 14 12 10
7377-4 No Vent Restriction
7377-1 Vent Screen Installed
60
10 psig
50 psig
50
7 psig
40 psig
40
8 6 4 2 0
5 psig
30 psig
30
2 psig
20 psig
½ psig
A – 15 psig B – 10 psig C – 4 psig D – 1 psig
20
A B C
1 psig
10
0 4
12
20
28
36
44
52
60
D
0
0
10
20
30
40
50
60
70
80
Flow, 1000's of scfh
Flow, 1000's of scfh
5
30
7377-03-2
7377-03-5 & 7377-03-10
4
25
3 psig
3
20
13 psig
2 psig
15
2
20"w.c.
11 psig
10 psig
10
1
5 psig
24"w.c.
7"w.c.
3 psig
5
0
0
100
200
300
400
500
600
700
0
0
200
400
600
800
1000
Flow, scfh
Flow, scfh
Fig. 2. 7377-103, 7377-1 and 7377-4 Capacities with natural gas at stp (14.7 psia and 60°F)
Bulletin 7377 Page 3
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