Conbraco 10-615-25 Relief Valve

The Conbraco 10-615-25 Relief Valve is a high-capacity safety component engineered specifically for hot water heating boilers and supply systems. This ASME Section IV certified valve features a 1" Female NPT inlet and an expanded 1 1/4" Female NPT outlet, allowing for a high-discharge capacity of 5,011,000 BTU. Factory-set at 125 PSI, this Apollo 10-600 series valve utilizes a bronze body construction and a silicone seat to ensure resilient performance in demanding hydronic environments.

Designed for professional contractors, the 10-615-25 incorporates a fabric-reinforced molded diaphragm that effectively isolates the spring chamber from the water media, preventing mineral buildup and corrosion within the spring cage. The high-capacity pressure relief valve is rated for a maximum temperature of 250??F and meets National Board capacity requirements. Its elevated seat design facilitates superior drainage, reducing the risk of seat leakage or "simmering" near the set limit. This domestic-made safety relief valve is the standard for protecting large-scale boiler systems against overpressure conditions caused by control failure.

• Extreme Relieving Capacity: Delivers 5,011,000 BTU/hr to protect high-output commercial and industrial boilers.
• Corrosion Resistance: Durable ASTM B584 bronze body and spring cage provide longevity in harsh water conditions.
• Contamination Protection: Reinforced diaphragm isolates the internal spring from the fluid, preventing scale and debris interference.
• Optimized Discharge: Oversized 1 1/4" outlet reduces backpressure during full-flow discharge events.
• Reliable Sealing: High-grade silicone seat ensures tight shut-off and resists sticking after long periods of inactivity.

What is the maximum temperature rating for this valve?
This 10-600 series valve is rated for a maximum service temperature of 250??F (121??C).

Can this valve be used for steam applications?
No, the Conbraco 10-615-25 is specifically ASME Section IV certified for hot water service only. It should not be used in steam boiler applications.

Why is the outlet larger than the inlet?
The expanded 1 1/4" outlet is designed to accommodate the volume of water and flash steam during a relief event, ensuring the valve reaches its full BTU capacity without being restricted by discharge piping friction.

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.