Shutoff Devices
Fisher pressure shut-off or slam-shut devices shut off the gas flow when the sensed control pressure passes a set limit in response to a low-pressure condition, a high-pressure condition, or both.
 | Fisher Types 634 and 634M high-pressure shut-off valves serve to provide overpressure protection by containment. Type 634 shut-off valve with internal registration is installed between a pressure reducing regulator and a downstream system or equipment. |
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 | Fisher Type VS100 slam-shut is designed to shut off the flow of gas to the downstream system in the event of outlet pressure rising above or falling below the predefined levels. |
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