OS&Y Valve

Definition

An OS&Y valve (Outside Screw and Yoke) is a type of valve with external exposed threads supported by a yoke, indicating the open or closed position of the valve.

Purpose

OS&Y valves are used in fire protection systems and other applications where it is crucial to visually confirm whether the valve is open or closed. The design allows for easy operation and maintenance.

Examples of Use

• Fire Sprinkler Systems: Used to control water flow in fire suppression systems.
• Water Supply Systems: Installed in main water lines to manage water distribution.
• Industrial Piping: Used in various industrial applications where reliable flow control is essential.

Related Terms

• Gate Valve: A valve that opens by lifting a gate out of the path of the fluid.
• Globe Valve: A valve used to regulate flow in a pipeline, consisting of a movable disk and a stationary ring seat.
• Butterfly Valve: A valve that regulates flow by rotating a disk within the pipeline.

Notes

• Visual Indicator: The exposed stem provides a clear visual indication of the valve's status, enhancing safety and reliability.
• Maintenance: OS&Y valves are designed for easy maintenance, allowing for replacement of components without removing the valve from the pipeline.