The 4000SS/5000SS 2nd Check Valve is a precision-engineered stainless steel backflow preventor designed for fire suppression systems in commercial, industrial, and municipal applications. This valve ensures reliable prevention of reverse flow, maintaining the integrity and safety of critical fire protection infrastructure.

• Material Construction: Manufactured from ASTM A351 grade CF8M stainless steel for superior corrosion resistance in harsh fire suppression environments.
• Internal Components: Utilizes durable 300-series stainless steel springs and fasteners that withstand cyclic pressure and temperature fluctuations typical in fire protection systems.
• Sealing Technology: Equipped with EPDM elastomer seats, providing a tight seal with excellent chemical resistance and extended service life.
• Regulatory Compliance: UL 312 listed and FM approved for fire protection, meeting stringent safety and performance standards.
• Standards Alignment: Designed to comply with NFPA 13 and NFPA 25 codes, ensuring proper installation, inspection, testing, and maintenance.
• Pressure Rating: Rated for maximum working pressures up to 175 PSI (12.1 bar), suited for a broad range of commercial and industrial fire suppression systems.
• Connection Compatibility: Available with ANSI B16.1 standard NRS flanged ends, simplifying integration into existing fire protection piping systems.
• Versatile Installation: Supports both horizontal and vertical (upward flow) orientations for flexible system design and layout.

This backflow preventor helps maintain fire suppression system readiness by preventing contamination from reverse water flow, a critical factor in adhering to fire safety regulations. Its corrosion-resistant stainless steel body and robust internal components reduce maintenance needs and extend operational life, even under demanding conditions. By minimizing hydraulic pressure loss, it ensures efficient water delivery during emergencies. Compatible with standard flanged piping, the 4000SS/5000SS valve streamlines retrofitting and new installations. Compliance with UL, FM, and NFPA standards guarantees that the valve meets industry safety requirements, making it an essential component for system designers and maintenance professionals focused on reliable, code-compliant fire protection.