Fire Flange OS&Y Gate Valve - Professional Fire Protection Control Valve For Sprinkler Systems

• Size Range: DN50 – DN400 (2" – 16"), compatible with common pipe sizes in fire protection systems

• Pressure Rating: PN10, PN16 (10 bar, 16 bar); Optional: ANSI 150LB (250 psi) for international applications

• Working Temperature: -10°C – 70°C (14°F – 158°F), suitable for normal fire water supply conditions

• Connection Standard: Flange connection, conforming to GB/T 9113, ANSI B16.5, DIN EN 1092-1

• Body Material: Ductile Iron (GGG50), epoxy coating inside and outside for corrosion resistance

• Stem Material: 304 Stainless Steel (Standard); 316 Stainless Steel (Optional) for harsh environments

• Gate Material: Ductile Iron with EPDM rubber full encapsulation, NSF/Drinking Water certified

• Sealing Material: EPDM rubber (resilient seal), ensuring bubble-tight shutoff

• Operation Type: Manual (handwheel), clockwise to close, counterclockwise to open

Superior Fire Safety Performance: Complies with international fire protection standards (UL, FM, GB 5135.1) and is specially optimized for fire water supply systems, ensuring stable and reliable operation in emergency fire situations, without failure or leakage.

• Excellent Corrosion Resistance: The valve body is made of high-strength ductile iron with internal and external epoxy coating, and the stem adopts 304/316 stainless steel, which can effectively resist corrosion, rust and wear in long-term wet environments, extending the service life of the valve.

• Bubble-Tight Shutoff Performance: The gate is fully encapsulated with high-quality EPDM rubber, which realizes integral vulcanization with the gate, ensuring zero leakage when fully closed, avoiding fire water loss and ensuring the stability of the fire water supply pipeline.

• Low Pressure Loss & High Flow Capacity: The full-flow design ensures unobstructed water flow when the valve is fully open, minimizing pressure loss, allowing rapid and sufficient fire water supply, and meeting the emergency water demand of fire protection systems.

• Easy Operation & Low Maintenance Cost: The manual handwheel design is labor-saving and smooth, and the bolted bonnet structure allows on-site maintenance, packing replacement and other operations without disassembling the valve from the pipeline, reducing maintenance time and cost.

Standard Installation Requirements: The valve shall be installed horizontally with the stem in vertical upward position. It is forbidden to install the valve upside down or sideways to avoid affecting visual indication and normal operation. Align the flange interface with the pipeline strictly, install bolts evenly, and ensure firm connection and uniform sealing force to prevent interface leakage.

• Correct Operation Guidelines: Operate only through the handwheel. Turn clockwise to close and counterclockwise to open. Do not use wrenches, levers or other tools for forced operation to avoid damaging the handwheel, stem and internal sealing components. Always keep the valve fully open or fully closed; throttling use is prohibited.

• Regular Inspection: Conduct periodic visual checks of the rising stem status to confirm the valve's open/closed state is consistent with system requirements. Inspect flange connections and sealing parts for water leakage, rust or damage. Check the flexibility of stem movement regularly to ensure no jamming during operation.

• Daily Maintenance: Keep the valve surface and stem clean and dry, and apply appropriate lubricant to the stem and transmission parts regularly to ensure flexible operation. For long-term opened valves, perform opening and closing tests quarterly to prevent sealing adhesion and failure caused by long-term static placement.