Conbraco 10-616-05 Valve

The Conbraco 10-616-05 is a high-capacity, professional-grade ASME Section IV safety relief valve specifically engineered for large-scale hot water heating boilers and hydronic systems. Featuring a 1.25-inch FNPT inlet and an oversized 1.5-inch FNPT outlet, this bronze relief valve is designed to maximize discharge flow and prevent dangerous pressure build-up. With a factory set pressure of 30 PSI and a massive steam relief capacity of 2,716,000 BTU/hr, it provides critical overpressure protection for high-demand commercial and industrial applications. The Apollo 10-616-05 utilizes a diaphragm-isolated spring chamber to keep the spring and internal components protected from the process media, ensuring consistent performance and reducing the risk of scale accumulation. Constructed from heavy-duty ASTM B584 bronze with a high-temperature silicone seat, this valve maintains a tight seal and reliable lift in systems operating at temperatures up to 250°F. For veteran contractors, this 10-600 Series valve is the standard for upgrading or maintaining hot water boiler safety in systems requiring maximum BTU throughput.

• ASME Section IV Certified: Verified capacity for use in high-output hot water heating systems and commercial boilers.
• Enhanced Flow Design: The 1.5-inch oversized outlet reduces backpressure, allowing for a 2,716,000 BTU capacity.
• Corrosion-Resistant internals: Heavy-duty bronze body and silicone seat ensure durability in harsh hydronic environments.
• Protection Strategy: Diaphragm isolation prevents water, sediment, and minerals from entering the spring chamber.
• High Temperature Range: Rated for service up to 250°F, making it suitable for a wide variety of heating configurations.

What is the difference between a safety relief valve and a standard pressure valve?
This HVAC safety valve is specifically designed to open fully and instantly once the 30 PSI threshold is met to dump volume quickly, whereas standard pressure regulators modulate flow. This is a critical safety device for boiler shells.

Can the 10-616-05 be installed horizontally?
No. To ensure proper drainage and operation of the lift lever, these relief valves must be installed in a vertical, upright position directly to the pressure vessel or a clean tapped opening without intermediate piping restrictions.

How do I determine if 2,716,000 BTU is sufficient for my boiler?
The relief capacity of the valve must exceed the maximum BTU output rating of the boiler. If your system exceeds 2.7M BTU, you may require a larger orifice or multiple valves to meet regional code compliance.

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.