The Viking Pressure Operated Relief Valve (PORV) Models D-3 and D-4 are critical components designed for fire protection professionals who require reliable pressure management in advanced fire suppression systems. These valves are engineered to maintain system integrity in Viking Deluge, Preaction, Firecycle® Multi-Cycle, and Surefire® systems, ensuring consistent and safe operation.

• Durable Construction: Crafted from robust materials to endure demanding operational environments, with the Model D-4 featuring specially plated components for enhanced corrosion resistance, extending valve lifespan in harsh conditions.
• Precision Pressure Control: Automatically vents pressure within control valve chambers to prevent premature resetting of deluge valves, maintaining a positive vent after activation and safeguarding system readiness.
• Automatic Reset Functionality: Designed to reset seamlessly when pressure is removed from the control diaphragm, eliminating the need for manual intervention and promoting reliable system performance.
• Industry Certifications: UL Listed and FM Approved, meeting rigorous safety and performance standards for fire protection equipment, reinforcing trust in system reliability and compliance.
• NFPA Compliance and Compatibility: Specifically engineered to align with NFPA codes and integrate smoothly with Viking proprietary fire protection systems, enhancing overall system robustness.

By effectively managing pressure in control valve chambers, the Viking PORV Models D-3 and D-4 prevent false resets and maintain continuous readiness of fire suppression systems. This reduces downtime and ensures rapid response during fire events, crucial for facilities requiring stringent fire safety measures. Suitable for engineers, contractors, and facility managers, these valves support compliance with fire codes while extending equipment life through corrosion resistance and precision engineering.