The Viking Swing Check Valve Model D-1 G-1 is a specialized backflow prevention device designed to protect fire protection systems by ensuring unidirectional water flow. Engineered for fire safety professionals and system integrators, this valve reliably prevents reverse flow, maintaining clean water supplies and system integrity when every second counts.

• Durable Construction: Made from high-strength ASTM A536 ductile iron, it withstands the mechanical stresses common in fire suppression environments.
• Corrosion-Resistant Components: Features stainless steel hinges and shafts that resist corrosion for extended service life in demanding conditions.
• Efficient Swing Check Mechanism: A freely swinging disc minimizes pressure drop while ensuring rapid closure to stop backflow, enhancing system efficiency during activation.
• Regulatory Compliance: UL Listed under UL 312 and FM Approved, meeting NFPA 13 and NFPA 25 standards for fire protection system safety and maintenance.
• Pressure Rating & Compatibility: Rated for pressures up to 175 PSI (12.1 bar), compatible with wet, dry, and deluge sprinkler systems for versatile application.
• Installation Flexibility: Supports horizontal and vertical (upward flow) piping orientations and available with NRS or grooved ends for easy integration into various piping layouts.

This valve plays a critical role in safeguarding potable water by preventing contamination due to backflow, thereby ensuring fire systems remain functional and compliant. Its rugged design reduces maintenance needs and minimizes downtime, even under challenging fire protection conditions. Ideal for commercial, industrial, or institutional fire sprinkler installations, it offers seamless integration into new or retrofit projects, optimizing system reliability and safety. Routine testing following NFPA 25 guidance ensures ongoing operational readiness, giving installers and building managers peace of mind.