Pilot valve

A pilot valve is a small valve that controls a limited-flow control feed to a separate piloted valve.[1] A pilot valve is one part of a larger pilot‑operated valve assembly, typically controlling a high pressure or high flow feed. Pilot valves are useful because they allow a small and easily operated feed to control a much higher pressure or higher flow feed, which would otherwise require a much larger force to operate; indeed, this is even useful when a solenoid is used to operate the valve.

Pilot valves are often used in critical applications (e.g., emergency and SIS controls) and are human-operated. They can be set up as a push-to-activate or dead man's switch.

See also

References

  1. ^ UL 1739 – Standard for Safety of Pilot-Operated Pressure-Control Valves (PDF). Northbrook, Illinois, US: Underwriters Laboratories. 2019. Retrieved 2026-02-28.


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