The 12" Double Check OSY LF Valve is a specialized backflow preventer designed for fire protection and water supply systems that require stringent contamination control. Ideal for facility managers and hydraulic engineers, this valve ensures safe potable water by preventing backflow in commercial and industrial fire safety networks while offering clear operation visibility and easy maintenance.

• Robust Construction: Crafted with a cast iron main body featuring corrosion-resistant coatings, the valve is built to withstand rigorous fire protection environments.
• Durable Internal Components: Dual check modules utilize wear-resistant materials engineered to handle frequent cycling and water chemistry fluctuations without compromising performance.
• OS&Y Stem and Yoke: Stainless steel stem offers corrosion resistance and provides a visible valve position indication, simplifying inspections and maintenance.
• Reliable Sealing: Equipped with high-grade EPDM elastomer seals and seats, ensuring consistent backflow prevention under variable pressures.
• Regulatory Certified: UL Listed to UL 312, FM Approved, ASSE 1015 Certified, compliant with AWWA C510, and aligned with NFPA 13 and NFPA 25 standards.
• Operational Specs: Rated for up to 175 PSI and operating comfortably within 33°F to 140°F, accommodating typical fire safety water conditions.
• Installation Versatility: Compatible with both horizontal and vertical piping setups, incorporating standard ANSI B16.1 flanged connections for seamless integration.
• Test Port Accessibility: Pre-drilled test cocks facilitate routine annual testing as mandated by NFPA, streamlining compliance and reducing maintenance downtime.

This valve addresses critical backflow risks in fire protection systems where health hazards are not a primary concern but preventing pollutant ingress is vital. The OS&Y mechanism not only provides reliable flow control but also allows visual confirmation of valve status, reducing inspection complexity and ensuring quick troubleshooting. Its durable materials and clear compliance with key regulatory standards make it particularly suited for high-demand commercial and industrial environments. By integrating this valve, users protect potable water supplies from contamination, maintain regulatory alignment effortlessly, and enhance system reliability with minimal service interruptions.