Built for Waterworks, Fire Protection, and Visible Valve Control

OS&Y Gate Valve(Hants Model HGO-FF / HGO-300FF) is a rising stem gate valve designed for dependable shut-off control in municipal waterworks, potable water distribution, and fire protection piping systems. The OS&Y structure allows operators and inspectors to visually confirm the valve position from outside the pipeline, making it suitable for critical systems where clear valve status verification is required.

This model series is available in multiple certified options for different applications: a UL listed model for fire protection systems, an NSF-certified model for drinking water applications under NSF/ANSI/CAN 61 and NSF/ANSI 372, and a dual UL + NSF certified and AWWA-compliant model for multi-purpose municipal and commercial piping systems.

Hants is a sub-brand of us. As a professional manufacturer of OS&Y gate valve and replacement parts, supplying reliable fire protection solutions for various industries.

Key Features and Benefits of OS&Y Gate Valve

• Fully compliant with both UL listing for fire protection and NSF/ANSI certification for potable water. This dual-purpose design simplifies inventory management, lowers procurement costs, and ensures full compliance with health and safety regulations.
• Manufactured and tested in strict accordance with AWWA standards, guaranteeing robust structural integrity, precise wall thickness, and heavy-duty mechanical endurance required for municipal and industrial waterworks.
• The Outside Screw and Yoke (OS&Y) architecture places the stem threads entirely outside the valve body. This protects critical moving parts from constant exposure to fluid, preventing corrosion from water, mineral buildup, and premature wear.
• The rising stem design provides immediate, foolproof visual confirmation of the valve’s position from a distance. Safety inspectors and facility operators can instantly verify whether the system is fully operational or isolated.
• Constructed with certified premium materials that meet strict lead-free standards. This guarantees that no toxic substances or heavy metals leach into the water column, ensuring 100% safe drinking water transmission.
• The straight-through wedge design allows for an unobstructed full-port fluid path when fully open. This significantly minimizes pressure drop, reduces turbulence, and maximizes flow efficiency across high-capacity piping networks.

Frequently Asked Questions(FAQ) about OS&Y Gate Valve

Q1: Can this valve be used simultaneously for both fire protection and drinking water systems?

Yes, absolutely. Thanks to its dual certification with UL Listed for fire safety and NSF/ANSI Approved for potable water, it is the perfect solution for modern combined water systems. It allows a single pipeline grid to handle both needs, significantly reducing product procurement costs and installation space while meeting all strict regulatory codes.

Q2: Why are OS&Y gate valves commonly made from ductile iron?

OS&Y gate valves are commonly made from ductile iron because of its higher tensile strength and impact resistance compared to gray cast iron.

NSF Certified for Drinking Water System Components: Lead Content (NSF/ANSI 372) , Health Effects (NSF/ANSI/CAN 61)

 

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