UL/FM OS&Y Gate Valves

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UL/FM OS&Y (Outside Screw and Yoke) gate valves are fire protection valves designed to provide reliable shutoff control and visual position indication in sprinkler, standpipe, and fire suppression systems. Commonly used in commercial, industrial, institutional, and high-rise fire protection applications, these valves are listed and approved by UL (Underwriters Laboratories) and FM (Factory Mutual) to meet strict life-safety and fire code requirements. The OS&Y design provides clear external indication of open or closed position, supporting system supervision and inspection compliance. Available in flanged and grooved end connections, UL/FM OS&Y gate valves are essential components in fire sprinkler system control assemblies.

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