Conbraco 10-615-20 Valve

The Conbraco 10-615-20 is a high-performance hot water pressure relief valve engineered for heavy-duty protection of hydronic systems and industrial-grade heating boilers. This ASME Section IV certified safety relief valve is designed with a 1" Female NPT inlet and a 1-1/4" Female NPT expanded outlet, optimized to handle a massive 4,105,000 BTU capacity at a 100 PSI set pressure. The 10-600 series features a robust bronze alloy body and a diaphragm-isolated spring chamber that effectively prevents corrosive water from reaching the functional spring components, ensuring reliable operation in demanding environments. With an elevated seating design that facilitates immediate water drainage away from the seat area, the Apollo 10-615-20 provides critical overpressure protection for large-scale commercial and industrial hot water supply systems. This unit is built to withstand high-volume flow conditions and is rated for a maximum working temperature of 250°F.

• Maximum BTU Rating: Capacity certified for 4,105,000 BTU systems, specifically designed for high-output boilers.
• Enhanced Flow Design: Includes an oversized 1-1/4" outlet to minimize backpressure and ensure rapid pressure discharge.
• Diaphragm Isolation: A fabric-reinforced molded diaphragm keeps the spring assembly dry, preventing mineral buildup and corrosion.
• High-Temperature Durability: Equipped with a silicone seat and alloy steel plated spring to maintain seal integrity up to 250°F.
• Code Compliance: Meets ASME Section IV and National Board (NB) requirements for heating boilers and hydronic systems.

Is the 1-1/4" outlet required for installation?
Yes, the expanded outlet is designed to match the potential discharge volume of the 4,105,000 BTU rating. Ensure your discharge piping is at least equal to the 1-1/4" outlet size to prevent restricted flow and potential valve chatter.

Can I use this valve for steam service?
No, the 10-615-20 is specifically rated for hot water service (ASME Section IV). For steam applications, a different series with Section I or Section VIII steam certification must be selected to ensure proper blowdown and capacity values.

What is the proper mounting orientation for this relief valve?
This valve must be installed in a vertical, upright position with the discharge line sloped to allow for gravity drainage. Any horizontal or inverted installation can cause debris to collect in the seat, leading to leakage or failure.

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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.