Conbraco 10-618-10 Valve

The Conbraco 10-618-10 is a heavy-duty, ASME Section IV certified pressure relief valve engineered for high-capacity hot water heating boilers and large-scale hydronic systems. This bronze safety relief valve features a 2" Female NPT inlet and an expanded 2 1/2" Female NPT outlet to facilitate superior discharge capacity, rated at 8,900,000 BTU/hr. Specifically factory-set at 50 PSI, the 10-618-10 ensures critical overpressure protection for commercial and industrial heat exchangers. As the direct replacement for 0537-H01-HM0050, this valve integrates a diaphragm-isolated spring chamber that prevents water contact with the spring, mitigating mineral buildup and corrosion. The construction includes an ASTM B584 bronze body, an EPDM/silicone seat for positive shut-off, and a stainless steel spring for long-term set-point stability. This high-capacity relief valve is designed to handle temperatures up to 250°F, making it a standard choice for technicians maintaining heavy-duty mechanical rooms.

• Maximum Discharge Capacity: Certified for 8,900,000 BTU/hr to protect large-scale boiler systems from catastrophic pressure spikes.
• Enhanced Seat Protection: Features an elevated seat design that ensures proper drainage away from the silicone seat area, reducing the risk of sediment-related leaks.
• Isolated Spring Design: The fabric-reinforced EPDM diaphragm completely isolates the spring from the process media, preventing scale and corrosion.
• Direct Drop-in Compatibility: Serves as a 1:1 replacement for the 0537-H01-HM0050, eliminating the need for complex repiping in existing systems.
• Industrial-Grade Build: Constructed with a corrosion-resistant ASTM B584 bronze body and a plated alloy steel spring for reliable performance in demanding environments.

What is the difference between the 10-608 and the 10-618 series?
While both are 2" valves, the 10-618-10 features an expanded 2-1/2" outlet (compared to the 2" outlet on the 10-608). This larger orifice allows for the higher BTU discharge rating required for high-output commercial boilers.

Can this valve be used for steam service?
No, this specific model is ASME Section IV certified solely for hot water heating and supply systems. It is not designed or rated for steam boiler applications.

Why are the inlet and outlet sizes different?
The expanded 2-1/2" outlet is designed to reduce backpressure during a full-discharge event, ensuring the valve can achieve its maximum certified 8,900,000 BTU capacity without 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.