OS&Y Flanged Resilient Gate Valve | UL/FM | Fire Protection

Product Overview

Бул OS&Y (Outside Screw and Yoke) flanged gate valve features a high-strength ductile iron body and stainless steel trim, suitable for medium-temperature water and fire protection systems. The non-rising stem design (stem rotates and lifts while handwheel remains stationary) ensures precise flow control and maintenance-free operation. Certified to FM and UL standards and compliant with AWWA C515, it is rated to PN16 (approx. 232Psi) and available in sizes from DN15 to DN300, meeting stringent requirements for high-rise buildings, commercial complexes, industrial facilities, and municipal fire water supply.

OS&Y Flanged Resilient Gate Valve

Technical Specifications

OS&Y Flanged Resilient Gate Valve

Key Features

• Non-Rising Stem Design – Stem rotates and lifts without handwheel movement, saving installation space and eliminating periodic maintenance for reliable long-term operation.
• Ductile Iron Body + Stainless Steel Trim – Combines the pressure resistance of cast iron with the toughness of steel to absorb water hammer; stainless steel stem and seat offer superior corrosion and wear resistance.
• FM/UL Dual Certified – Meets the world’s strictest fire protection standards, enabling direct specification for fire projects in Europe, America, and beyond.
• Resilient Seated Seal – Elastomer seat ensures bubble-tight shutoff, reduces operating torque, and provides smooth, effortless handwheel control.
• Broad Size & Pressure Coverage – Full range DN15–DN300, PN16 medium-pressure rating, suitable for building water supply, fire sprinkler, and industrial cooling water systems.
• Flexible Customization – OEM/ODM/OBM available, supporting custom flange standards, coatings, and special markings based on drawings or samples.

Йодмаш-влак

• High-Rise Building Fire Systems – Branch isolation and floor control in standpipe and sprinkler networks for residential towers, offices, hotels, больницы-влак.
• Commercial Complexes & Public Facilities – Isolation and switching in fire water systems for malls, supermarkets, convention centers, stadiums.
• Industrial Plants & Warehouses – Zoning control in fire ring mains for workshops, logistics centers, manufacturing facilities.
• Municipal Fire Water Supply – Outdoor hydrant distribution, fire reservoir inlet/outlet, and pump station header piping.
• Нефтехимический & Energy Facilities – Branch shutoff and emergency isolation in water curtain and foam extinguishing systems for oil depots, chemical plants, power stations.
• ОВК & Industrial Cooling Water – On/off and flow regulation for medium-temperature media such as chilled water and process cooling water.

OS&Y Flanged Resilient Gate Valve

Упаковочный да колтымо

• Packing Method：
  • Small diameters (DN15–DN80): Packed in export-grade cartons with foam/PE padding, palletized.
  • Large diameters (DN100–DN300): Packed in fumigation-free wooden crates or steel-framed boxes, with flange port covers and plastic film wrapping to prevent scratches.
  • Customized moisture-proof and anti-rust packaging for sea freight available upon request.
• Колтымаш：Supported by sea, кӱртньыгорно, южышт, or road transport to designated ports or destinations. Container loading and securing services provided, with long-term logistics partners ensuring fast and safe delivery.

Тӱлымӧ условий

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Компанийын профильже

Луоян Датанг Энерджи Тех Ко., ООО is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for water treatment, chemical, ӱй & газ, ОВК, and industrial piping systems worldwide. All products are manufactured to international standards with CE and ISO 9001 certifications. With over 10 years of experience, a modern facility of 80,000 m², жана 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

OS&Y Flanged Resilient Gate Valve

FAQ

1. What is the difference between OS&Y and non-rising stem gate valves, and how to choose?
OS&Y (outside screw & yoke) valves have a stem that rises and lowers with the handwheel, providing visual position indication. Non-rising stem valves have a rotating stem that lifts internally while the handwheel remains fixed, suitable for limited installation space. Our product adopts the non-rising design, offering compact installation and maintenance-free operation. For ample space and visual indication, choose traditional OS&Y; for tight spaces, our non-rising model is recommended.

2. Can this valve be used for fire foam or seawater?
Standard configuration is for fresh water and medium-temperature water. For foam or seawater, special sealing materials (EPDM/Viton) and coatings (epoxy + polyurethane) are required. Please specify the medium when ordering – we offer customized solutions.

3. Does PN16 rating meet fire system requirements?
PN16 (2.1МПа) equals ~232Psi, covering most building fire system operating pressures (typically 1.0–1.6MPa). For super high-rise or high-pressure pump systems, PN25 or higher is available – please consult our sales team.

4. Which flange standards are supported?
Standard options include ANSI B16.1 (Class 125/150), DIN PN16 (ИЧИНДЕ 1092-2), and BS 4504. Other standards such as JIS or AS/NZS are available upon request with your flange drawing or dimensional requirements.

5. Does the valve come with a locking device?
An optional padlock locking device (max 1 padlock) is available to prevent unauthorized operation, especially for fire valves that must remain normally open/closed. Standard product does not include padlock – please specify locking requirement in your order.

OS&Y Flanged Resilient Gate Valve