Broad adjusting range for the response pressure
Low pressure loss
JSAV is used for the protection against high pressure for all valve connected downstream of a gas regulator. The gas supply is shut off if the downstream pressure exceeds spring set point of over pressure shut off valve.
VSBV is a safety relief valve designed to reduce temporary pressure surges
Downstream of the pressure reducing regulator caused by fluctuations in system
Gas pressure regulating system should be assembled with a safety over pressure slam shut off valve (JSAV) upstream of the regulator and safety relief valve (VSBV). These safety valves are not required if the highest possible operation pressure of the regulator does not exceed the maximum permissible operating pressure of all devices connected downstream of the regulator.
Type of Gas: Nature gas, clean coke oven gas and LPG
Ambient temperature range: 5° F to 140° F (-15° C to 60° C)
Maximum inlet pressure: 60 psig (4 bar)
JSAV response pressure: 8" WC to 8.0 psig (18 to 550 mbar)
JSAV factory setting: 1.7 psig (110 mbar)
VSBV response pressure: 8" WC to 7.0 psig (20 to 500 mbar)
VSBV factory setting: 1.43 psig (100 mbar)
Materials of construction
JSAV and VSBV regulators have pressure die-cast aluminium alloy bodies and diaphragm housings. Diaphragms are nitrile rubber, and valve discs have vulcanized nitrile rubber seals. Valve stems and valve discs are aluminum.