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FISHER™ 377 Trip Valve

Main Features

Cost Effective—Single trip valve construction reduces costs and spare part requirements of those systems using three separate switching valves to perform the failure functions. A single trip valve greatly simplifies piping requirements.
Ease of Mode Conversion—Conversion to any of the fail modes requires only minor hookup changes
Adjustable Trip Valve—The trip point is adjustable for specific supply pressure requirements.
Reliable Operation—The trip valve design includes large diaphragm areas and few moving parts for efficient performance, minimum maintenance, and long service life.
Various mounting options: The trip valve can be top‐mounted on a manifold, yoke‐mounted, or bracket‐mounted to match the application requirements.

Specifications

Available configurations: 377D/377L/377U/377CW/377CCW
Permissible supply pressure: Maximum: 10.3 bar(150psig); Minimum value: 3.8bar (55 psig)
Installation: top-mounted/side-mounted
Housing material: aluminum/stainless steel
Other Configurations: Contact us for more information

Applications

FISHER 377 pressure‐sensing trip valves are for control applications where a specific valve/actuator action is required when supply pressure falls below a specific point. When supply pressure falls below the trip point , the trip valve causes the actuator to fail up, lock in the last position, or fail down. When the supply pressure rises above the trip point, the 377 trip valve automatically resets, allowing the system toreturn to normal operation.