SUPERVISORY SWITCH FOR OS&Y GATE VALVE 2″-16″

The supervisory switch for os&y gate valve 2″ to 16″ mech is an essential fire protection component designed to monitor the open position of an outside screw and yoke (os&y) gate valve. this electromechanical device mounts directly to the valve yoke and features a trip lever that rests against the valve stem. when the valve is closed, the moving stem activates the switch, sending a signal to the fire alarm control panel to indicate a “supervisory” or “trouble” condition.
Designed to fit a wide range of valve sizes from 2 inch to 16 inch, this switch is housed in a durable, weather resistant enclosure suitable for indoor and outdoor use. it provides a critical layer of safety by ensuring that primary water supply valves are not left closed accidentally, which would disable the fire sprinkler system. its adjustable mounting bracket and tamper resistant screws make it a standard choice for industrial and commercial fire safety compliance.

Technical Specification

Valve Size Range: 2 inch to 16 inch (dn50 to dn400)
Switch Type: spdt (single pole double throw)
Enclosure: die cast metal / weather resistant
Mounting: adjustable yoke bracket
Application: fire protection system monitoring
Temperature Range: -40 to 60 degrees celsius