The Fi-sher 377 is a pressure-sensing trip valve used in control applications where a specific actuator action is required when supply pressure falls below a set point. It automatically causes the actuator to fail up, lock in the last position, or fail down, and resets when supply pressure recovers. Product Overview This single-unit trip valve simplifies systems that would otherwise need multiple switching valves. It features an adjustable trip point, large diaphragm areas,
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