Conbraco 10-616-15 Valve

The Conbraco 10-616-15 is a high-capacity ASME Section IV safety relief valve designed specifically for large-scale commercial hot water heating boilers and hydronic systems. Featuring a 1-1/4 inch FNPT inlet and a 1-1/2 inch FNPT outlet, this bronze-bodied hot water pressure relief valve is factory-set at 75 PSI to ensure system integrity during overpressure events. With a massive thermal discharge capacity of 5,535,000 BTU/hr, it effectively manages high-output BTU loads in demanding mechanical rooms. The Apollo 10-600 series construction utilizes a high-strength ASTM B-584 bronze body and a silicone seat to provide a positive seal and resist sticking. This heavy-duty boiler safety valve is essential for contractors maintaining compliance with jurisdictional pressure vessel codes while ensuring reliable overpressure protection in high-rise or industrial heating applications.

Key Benefits for Technicians

• High-Volume Discharge: Rated for over 5.5 million BTU, making it suitable for high-output commercial boilers.
• Corrosion Resistance: Engineered with a cast bronze body and stainless steel springs to withstand aggressive hydronic environments.
• Internal Alignment: Features a pivot-mounted disc for self-alignment and consistent reseating after actuation.
• Code Compliance: National Board capacity certified and ASME HLW stamped for high-capacity safety requirements.
• Durable Sealing: Equipped with a soft-tissue silicone O-ring to prevent seat leakage under high operating temperatures.

Common Questions for Installation

Can this valve be mounted horizontally?
No, for proper operation and to ensure the internal components seat correctly, this valve must be installed in a vertical upright position directly on the boiler or a discharge line without any intervening valves.

What causes this valve to drip during normal operation?
Persistent dripping often indicates that the system expansion tank is waterlogged or sized incorrectly, or that the system operating pressure is too close to the 75 PSI set point, causing "simmering."

Is the discharge piping size important?
Yes, the discharge line must match the 1-1/2 inch outlet size and be pitched to allow for complete drainage to avoid water accumulation on the valve seat.

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.