Conbraco 10-617-15 Valve

The Conbraco 10-617-15 (Apollo 10-600 Series) is a mission-critical hot water relief valve designed for high-capacity protection of commercial heating boilers and hydronic systems. This ASME Section IV certified valve features a 1-1/2" Female NPT inlet and an oversized 2" Female NPT outlet, allowing for maximum discharge flow. Engineered with a durable ASTM B584 bronze body and a corrosion-resistant plated steel spring, it is factory set at 75 PSI to ensure precise overpressure protection. With a massive 7,531,000 BTU capacity, this high capacity pressure relief valve is built to handle the rigorous demands of large-scale boiler plants. The internal assembly includes a silicone seat and an EPDM-reinforced diaphragm that effectively isolates the spring chamber from the process media, preventing fouling and ensuring consistent performance in high-temperature environments up to 250°F. For veteran contractors, this 10-600 series model remains the industry standard for ASME boiler safety and long-term reliability.

Key Benefits

• Extreme BTU Throughput: Rated for 7,531,000 BTU/hr, making it suitable for large-scale hydronic heating and supply systems.
• Oversized Discharge: The 2" outlet configuration allows for faster pressure relief compared to standard port models.
• Superior Protection: Diaphragm isolation prevents mineral buildup and corrosion within the spring chamber.
• Field Reliability: Direct acting design with a lift-lever for manual testing and verification by service technicians.
• Code Compliance: Meets National Board capacity certification requirements and ASME Section IV standards.

Common Questions

What is the maximum operating temperature for this valve?
The 10-617-15 is rated for a maximum temperature of 250°F, ideal for most high-capacity hot water heating applications.

Can I use this valve for steam service?
No, this specific model is designed and certified for hot water heating boilers and supply systems only; steam applications require an ASME Section VIII or Section I rated valve.

Why is the outlet larger than the inlet?
The 2" expanded outlet is designed to reduce backpressure on the valve during discharge, ensuring the valve maintains its certified BTU relief capacity.

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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.