Mueller BD34580 Relief Valve

The Mueller BD34580 Relief Valve is a high-pressure refrigeration safety device engineered for heavy-duty industrial and commercial HVACR applications. Featuring a 1 5/8" x 1 1/4" NPT connection profile, this straight-thru pressure relief valve is factory-set to a 235 PSI discharge threshold. Built by Mueller Refrigeration, the BD34580 is primarily utilized on liquid receiver applications above the liquid refrigerant level to prevent catastrophic over-pressurization. It provides a robust operating temperature range of -40°F to 300°F, ensuring reliable performance in extreme thermal environments.

This SafetyMaster relief valve is fully compliant with ASHRAE Standard 15 and ASME code requirements for unfired pressure vessels. It is compatible with all major CFC, HCFC, and HFC refrigerants, including R410A, and is often paired with a rupture disc for visual indication of an over-pressure event. The BD34580 is NPT-threaded for secure integration into existing piping systems, providing the high-volume discharge capacity necessary to protect essential system components like condensers and receivers from mechanical failure.

Key Benefits

• Dual-Code Compliance: Meets both ASME and ASHRAE Standard 15 safety requirements for refrigerant vessel protection.
• Broad Fluid Compatibility: Rated for use with a wide range of refrigerants and oils, ensuring versatile integration into various HVACR systems.
• High Discharge Capacity: Designed for maximum discharge rates certified by the National Board of Boiler and Pressure Vessel Inspectors.
• Extreme Temperature Resilience: Maintains operational integrity from -40°F to 300°F, making it suitable for both cooling and heating cycles.

Common Questions

What is the primary application for the Mueller BD34580?
This pressure relief valve is specifically designed for use on liquid receivers and pressure vessels. It should be mounted in the vapor space above the liquid level to ensure proper high-volume gas discharge during a relief event.

Can this valve be used with R410A refrigerant?
Yes, the BD34580 is compatible with high-pressure HFC refrigerants like R410A, provided the system requirements do not exceed the 235 PSI set point.

Is the discharge rate certified?
Yes, all Mueller SafetyMaster valves have discharge rates certified by the National Board of Boiler and Pressure Vessel Inspectors, ensuring the valve meets its rated flow capacity.

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.