6" Double Check Valve Assembly with OS&Y Valve for Sprinkler Systems
6" Double Check Valve Assembly with OS&Y Valve for Sprinkler Systems
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Technical Specifications (Material Focus)
The 6" Double Check Valve Assembly features a body constructed from ASTM A126 Class B cast iron, selected for its strength and corrosion resistance in fire protection environments. Internal components include stainless steel springs and brass check valves, engineered for durability and reliable operation under fluctuating fire system pressures. The OS&Y (Outside Stem & Yoke) valve is crafted from stainless steel with a bronze stem to provide precise shut-off control and visual stem position indication. Factory-installed gauge fittings, compliant with NFPA maintenance standards, allow for straightforward monitoring and system diagnostics.
Regulatory Compliance
This valve assembly is UL Listed under UL 312 for backflow prevention devices, ensuring it meets stringent safety and performance criteria. It carries FM Approval verifying performance reliability in fire suppression systems. The product complies with NFPA 13 and NFPA 25 standards for installation and periodic testing of sprinkler system components, ensuring safe and code-compliant operation.
Operational Compatibility
Designed for installation in fire sprinkler systems with 6-inch nominal pipe sizes, this assembly supports working pressures up to 175 psi (12.1 bar), accommodating typical commercial and light industrial water supply conditions. Connections are threaded Female x Male (FxG) NPT, facilitating compatibility with standard piping networks and simplifying system integration and maintenance.
The 6" Double Check Valve Assembly with OS&Y valve is ideal for building engineers and fire protection contractors requiring a dependable backflow prevention solution that minimizes contamination risk in potable water supplies. Its robust construction and accessible design enable straightforward inspection and servicing, reducing system downtime. By integrating this valve assembly, facilities can maintain fire safety compliance while preserving water system integrity, addressing common challenges in fire sprinkler maintenance and backflow prevention.