Table C. 7337A/B/C-4 Capacities 

(continued)

Table D. Materials of Construction 

Bulletin 7337A/B/C-4

Page 5

Body

Diaphragm 

Casing, and 

Spring Case

Cast Iron

Orifi ce

Brass

Aluminum

Brass

Plated

Steel

Diaphragm

Plate

Buna-A with 

Nylon Fabric 

Insert

Diaphragms

Stem

Capacities in scfh 

Inlet Pressure 

psig

Outlet Pressure

psig

unless otherwise 

noted

1/2" orifi ce 3/4" orifi ce 1" orifi ce

30

40

50

60

80

100

125

150

11600
11300
10000
8750
6300

14200
14000
12800
11700
9800
7000

16800
16500
15400
14500
13000

19400
19000
18500
17000

24600

29800

36300

41000

24500
24000
21700
18500
13200

30000
29500
27200
24500
20400
14800
35500
35000
32500
30500
27100

41000
40500
39000
36400
52000

62500

76500

7 and less

10

15

20

25

10 and less

15

20

25

30

35

15 and less

20

25

30

35

20 and less

25

30

35

35 and less

35 and less

35 and less

35 and less

40200
39400
35500
30400
21600

49200
48500
44500
40500
33400
24300

58200
57400
53200
50000
44600

67200
66000
63500
59500

Capacities | High Pressure Gas Regulators

Catalog Combustion 2021 - Page 1202

Fives Group
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