SB Relief Regulators are versatile - offering fast, positive response service for air, all types of gas fuels, and inert gas applications. They may be used as bypass valves in automatic safety systems, and as high capacity relief regulators downstream of reducing regulator stations and inert gas generators. Supplied with color-coded springs in cataloged pressure ranges. Inlet pressures to 25 psig operating; maximum surge to 50 psig without damage. Available in sizes 3/4 '' through 3'' NPT.
FEATURES
Drip tight shut-off below start to open point
Balanced valve design
Synthetic reinforced diaphragms - for air, all fuel and inert gases
Inlet pressures to 25 psig operating, maximum surge to 50 psig without damage
Rugged proven design
Standard SB series operating temperatures to 150°F
CAPACITY TABLE
Relief Regulator Catalog Number
Pipe Size NPT
Capacities in SCFH of Various Specific Gravity
Gases @ 14" W.C. Pressure Drop
0.4
0.6
1.0
1.5
2.0
SB 6
3/4"
1,230
1,000
780
630
550
SB 8
1"
2,400
2,000
1,500
1,200
1,100
SB 12
1-1/2"
4,900
4,000
3,100
2,500
2,200
SB 20
2-1/2"
12,300
10,000
7,800
6,300
5,500
SB 24
3"
21,000
17,000
13,000
11,000
9,200
SPRING RANGES
Spring Number
Spring Color
Spring Adjustment Range Start to Stroke Setting
Minimum
Maximum
4
Red
1" W.C.
8" W.C.
16
Orange
7" W.C.
30" W.C.
48
White
12 osi
48 osi
Spring #48 not available on #SB20 and SB24
