The OSY-40 Gate Valve Supervisory Switch is use to monitor the open position of an OS&Y (outside stem and yoke) type gate valve. The OSY-40 Gate Valve Supervisory Switch Kit inlcudes a switch and a bracket for installation. This switch is available for use on OS&Y gate valves sizes 2-1/2" through 12" and on backflow installations a switch is required on each OS&Y gate valves.
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