Conbraco 10-617-25 Valve

The Conbraco 10-617-25 is a professional-grade, high-capacity hot water pressure relief valve designed specifically for the protection of large-scale ASME Section IV heating boilers and commercial hydronic systems. This Apollo 10-600 series valve features a 1-1/2 inch female NPT inlet and an expanded 2 inch female NPT outlet to handle massive discharge volumes, boasting a certified capacity of 11,792,000 BTU/hr. Factory set at 125 PSI, this valve is engineered with a corrosion-resistant ASTM B584 bronze body and a silicone seat to ensure positive shut-off and reliable operation in demanding mechanical environments. The design incorporates a fabric-reinforced molded diaphragm that effectively isolates the spring chamber from the process media, preventing contamination and ensuring consistent performance up to a maximum temperature of 250°F. For veteran contractors, the high BTU capacity and National Board certification make this the standard choice for safeguarding high-output thermal systems against overpressure conditions caused by control failure or thermal expansion.

• ASME Section IV Certified: Provides validated safety performance for high-capacity commercial and industrial boiler applications.
• High BTU Displacement: Rated for 11,792,000 BTU, making it suitable for larger heating plants and high-output water systems.
• Enhanced Drainage Design: Features an elevated seat to facilitate proper water drainage away from the seating area, reducing mineral buildup.
• Rugged Construction: Built with a heavy-duty bronze safety valve body and plated alloy steel springs for long-term durability in high-pressure environments.
• Oversized Outlet: The 2 inch FNPT discharge port allows for rapid pressure relief without restrictive backpressure.

Is the Conbraco 10-617-25 suitable for steam service?
No, this specific model is an ASME Section IV valve designed strictly for hot water heating boilers and supply systems. For steam applications, an ASME Section I or VIII certified valve is required.

What is the maximum operating temperature for this relief valve?
The Apollo 10-617-25 is rated for a maximum temperature of 250°F (121°C). Exceeding this limit can damage the silicone seat and diaphragm, compromising system safety.

Why does this valve have a larger outlet than the inlet?
The expanded 2 inch outlet is a high-capacity feature designed to accommodate the rapid expansion of fluid during a discharge event, ensuring the 125 PSI set point is maintained without flow restriction.

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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.