Conbraco 10-604-20 Relief Valve

The Conbraco 10-604-20 Relief Valve (Apollo RVW60 Series) is a rugged, ASME Section IV certified capacity safety component engineered for high-output hot water heating boilers and hydronic systems. Featuring a heavy-duty bronze body construction and a 3/4" female NPT inlet X 3/4" female NPT outlet, this valve is factory set at 100 PSI to provide reliable overpressure protection. With a substantial 2,162,000 BTU capacity, it is specifically designed to handle high-demand commercial and industrial applications. The internal silicone seat ensures a positive seal, while the diaphragm-isolated spring chamber prevents corrosive system fluids from making contact with the steel-plated alloy spring, extending the service life of the hot water pressure relief valve in harsh environments. Designed for operating temperatures up to 250°F, this high capacity relief valve meets the rigorous safety standards required for modern hydronic infrastructure.

Key Benefits

• ASME Section IV Certified: National Board capacity certified to ensure strict compliance with safety codes for hot water heating systems.
• High BTU Discharge: Capable of handling 2,162,000 BTU/hr, making it ideal for large-scale boiler protection.
• Corrosion-Resistant Internals: Features a silicone seat and a fabric-reinforced molded diaphragm that isolates the spring from the water media.
• Durable Construction: Built with ASTM B584 bronze and a stainless steel nameplate for permanent identification in the field.
• Enhanced Drainage: Designed with an elevated seat to facilitate proper water drainage away from the seating area, preventing sediment buildup.

Common Questions

What is the maximum operating temperature for the Apollo 10-604-20?
This valve is rated for a maximum service temperature of 250°F (121°C), making it suitable for high-temperature hot water applications.

Can this valve be used for steam service?
No, the 10-600 series is specifically an ASME Section IV valve designed for hot water boiler systems. For steam service, an ASME Section I or VIII valve would be required.

How does the isolated spring chamber benefit the installation?
The diaphragm isolates the spring and guide area from the process fluid, protecting the mechanical components from scale and corrosion that could otherwise cause the valve to stick or fail.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.