OS&Y Gate Valve

Ensure uninterrupted water delivery to your fire protection systems with our Premium OS&Y (Outside Screw and Yoke) Gate Valve. Built specifically for fire pump rooms, riser systems, and main water supply lines, this heavy-duty valve offers dependable isolation and clear visual monitoring. Engineered to withstand high operational pressures and harsh environments, our OS&Y gate valves strictly satisfy all industrial safety regulations and local civil defense specifications.
Applications:
Fire fighting systems
Water networks
Features:
Visible position indicator
High pressure resistance
Easy operation
Reliable performance

SKU: SW-148-A0

Categories: 4-inch civil defense link

Immediate Visual Safety Verification: Premium OS&Y Gate Valves

The Outside Screw and Yoke (OS&Y) gate valve is a strict, non-negotiable safety requirement dictated by international fire codes for main water supply connections and fire pump room headers. The brilliant mechanical asset of the OS&Y framework is its external threaded stem, which rises high outside the valve body when opened. This provides fire marshals and safety inspectors with instant visual verification from across a room that the main fire water path is open and operational.

Integrated Telemetry for Supervisory Smart Monitoring

The structural yoke of our OS&Y valves is engineered with specialized mounting surfaces designed to house external valve tamper switches easily. Once fitted, any unauthorized mechanical turning of the valve wheel triggers an immediate trouble alert on the central fire alarm screen, preventing accidental blockages of life-saving water paths.

Performance and Certification Marks:

High-Mass Tensile Core: Heavy-duty ductile iron casting built to withstand intense dynamic operating pressures up to 200 / 300 PSI.
Stainless Steel Stem Alignment: Premium stainless steel internal rods that eliminate rust binding, ensuring smooth turning over decades of stagnant installation.
Flanged Mechanical Integrity: Precision bolt flanges that maintain leak-free junctions on main building risers and suction manifolds.
UL Listed and FM Approved: Holds the industry's highest global safety badges, checking every box for strict Civil Defense building handovers and NFPA 13 audits.

Its "Outside Screw and Yoke" design provides a clear visual indication of whether the valve is open or closed, ensuring the water supply is not accidentally shut off.

It is monitored by installing an external OS&Y Tamper Switch (Supervisory Switch) onto the valve yoke. If the valve handle is turned to close it, the switch automatically sends a supervisory signal to the fire alarm control panel, alerting management of the tampering.

The primary reason is immediate visual status confirmation. Since the stem rises outside the valve body, safety officers and inspectors can tell at a glance whether the valve is fully open or closed. This minimizes the risk of accidentally leaving a fire water line shut off.