The Viking Deringer 20 Double Check Backflow Valve Assembly is a precision-engineered backflow prevention device designed specifically for commercial and industrial fire sprinkler systems. It provides fire protection professionals with a durable and reliable solution to safeguard potable water supplies from contamination in high-demand fire safety environments.

• Durable Construction: Main body made from ASTM A536 ductile iron, offering strong mechanical integrity and corrosion resistance ideal for harsh fire protection settings.
• Corrosion-Resistant Internal Components: Springs and fasteners use 300-series stainless steel to ensure long service life and dependable valve function.
• Advanced Thermoplastic Check Modules: Precisely engineered smooth-sealing components minimize wear and maximize operational reliability over extended use.
• EPDM Elastomer Sealing Discs: Reversible and replaceable sealing discs allow for easier maintenance and continued positive backflow prevention performance.
• Regulatory Compliance: UL Listed (UL 1469), FM Approved, and compliant with ASSE 1015, AWWA C510, NFPA 13, and NFPA 24 standards, ensuring adherence to rigorous fire safety codes.
• Operational Range: Supports working pressures up to 175 PSI (12.1 bar) and temperatures between 33°F to 140°F (0.5°C to 60°C) for versatile application.
• Space-Efficient Design: Compact ANSI B16.1 flanged assembly fits in confined mechanical spaces or underground vaults, enabling flexible installation orientations both horizontal and vertical.

By integrating the Viking Deringer 20, fire system designers and installers gain a trustworthy backflow valve that effectively prevents contamination risks from low to moderate hazard substances within fire protection piping. Its rugged corrosion-resistant materials reduce maintenance frequency and operational downtime, while advanced sealing technology maintains consistent flow efficiency during critical fire events. This ensures your fire sprinkler system remains fully functional without compromising the safety of potable water sources, making it an essential component for commercial and industrial fire safety infrastructure.