Conbraco 10-614-02 Valve

The Conbraco 10-614-02 (also identified as the Apollo RVW61) is a high-capacity, ASME Section IV certified bronze safety relief valve engineered for the protection of hot water heating boilers and hydronic systems. Designed for heavy-duty commercial and industrial applications, this valve features a 3/4" Female NPT inlet and an expanded 1" Female NPT outlet to facilitate maximum discharge flow. This specific model is factory-set at 20 PSI and delivers a high-volume thermal relief capacity of 746,000 BTU/hr. Its ASTM B584 bronze body and silicone seat ensure superior corrosion resistance and a bubble-tight seal under high-temperature conditions up to 250°F. For the mechanical contractor, the diaphragm-isolated spring chamber is a critical feature, preventing system water from contacting the plated alloy steel spring, which prevents scaling and ensures a consistent set pressure over long-term operation. This National Board capacity certified valve is a direct-acting solution for preventing over-pressure conditions due to control failure or thermal expansion in potable water systems and low-pressure heating boilers.

• Enhanced Flow Dynamics: The expanded 1" outlet reduces backpressure during discharge, ensuring the valve reaches its full 746,000 BTU rating efficiently.
• Isolated Spring Design: A fabric-reinforced EPDM/Silicone diaphragm keeps the spring assembly dry, protecting it from sediment and corrosion common in hydronic loops.
• System Compatibility: The 3/4" x 1" NPT configuration is a standard footprint for many commercial boiler relief lines, making it an ideal choice for direct retrofit or new installations.
• Certified Reliability: Manufactured in the USA, this valve meets ASME Section IV and CRN 0G8547.5C requirements for safety-critical pressure vessel applications.

Is the Conbraco 10-614-02 suitable for steam boiler applications?
No, this model is an ASME Section IV valve specifically rated for hot water heating and supply systems. For steam service, a Section I or Section VIII "V" or "UV" stamped valve is required.

Can the set pressure be field-adjusted?
The set pressure of 20 PSI is factory-set and sealed. Tampering with the seal to adjust the pressure will void the ASME certification and potentially cause system failure.

What is the purpose of the expanded outlet?
The 1" outlet is larger than the 3/4" inlet to accommodate the volumetric expansion of water as it is discharged, ensuring the valve can achieve its high-capacity BTU rating without being throttled by the discharge piping.

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.