Conbraco 10-301-05 Relief Valve

The Conbraco 10-301-05 is a high-capacity hot water pressure relief valve engineered specifically for residential and commercial hydronic heating systems. As an ASME Section IV certified safety component, this Apollo RVW30 series valve is critical for protecting hot water boilers from over-pressurization. Built with a heavy-duty ASTM B584 bronze body and stainless steel springs, it provides high-level corrosion resistance in demanding HVACR environments. This model features a 3/4" Male NPT inlet and a 3/4" Female NPT outlet, factory-preset to activate at 30 PSI. With a discharge capacity of 550,000 BTU/hr and a maximum service temperature of 250°F, it ensures reliable thermal expansion relief. Standard EPDM soft goods provide a positive seal, making it a staple for technicians performing boiler pressure relief valve replacement. Its robust construction and domestic manufacturing ensure it meets strict engineering standards for safety and longevity in closed-loop systems.

• ASME Section IV Certified: National Board capacity certified to meet stringent safety codes for hot water heating boilers.
• Corrosion-Resistant Construction: Features a durable ASTM B584 bronze body and stainless steel springs for long-term reliability in water-based systems.
• High Discharge Capacity: Rated for up to 550,000 BTU/hr to handle significant thermal expansion and prevent vessel failure.
• Temperature Resilience: Engineered to operate effectively in high-temperature hydronic applications up to 250°F.
• Standardized Fit: 3/4" NPT connections allow for seamless integration into existing boiler trim and manifold piping.

Is the Conbraco 10-301-05 suitable for steam boiler applications?
No, this valve is an ASME Section IV liquid-service valve designed specifically for hot water heating boilers and hydronic systems. It is not rated for steam service.

What is the difference between the 10-301-05 and other 10-300 series valves?
The suffix -05 specifically denotes the 30 PSI set pressure and the 3/4" Male x 3/4" Female NPT configuration. Other variants may have different connection sizes or pressure settings.

Can this valve be mounted in any orientation?
For proper functionality and to satisfy safety codes, the valve should be installed in a vertical position with the drain line directed downward to prevent sediment buildup and ensure a clean discharge.

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.