Mueller Industries AH15512 Valve

The Mueller Industries AH15512 Valve is a specialized angle pressure relief valve engineered for critical safety within HVACR systems. This 400 PSI relief valve features a 3/8 inch NPTFE inlet and a 3/8 inch flare outlet, designed primarily for liquid receiver applications. Built to satisfy ASHRAE Standard 15 code requirements, the AH15512 ensures high-volume discharge capacity to protect refrigeration vessels from over-pressurization. The heavy-duty brass construction supports a wide continuous operating temperature range from -40°F to 300°F, making it a reliable choice for demanding rooftop or equipment room environments. This Mueller Safetymaster valve is compatible with all major CFC, HCFC, and HFC refrigerants and oils, providing a versatile solution for modern refrigerant safety device installations. As a technician, sizing this valve to at least 25% above the maximum operating pressure is recommended to prevent premature discharge and ensure system integrity.

• Precise Pressure Control: Engineered as a 400# rated safety device to prevent vessel failure by relieving excess system pressure accurately.
• Broad Compatibility: Fully compatible with R410a and other common refrigerants, ensuring seamless integration into varied HVACR service calls.
• Durable Brass Build: Resilient materials withstand extreme thermal shifts between -40°F and 300°F without compromising mechanical function.
• Industry Compliance: Manufactured in accordance with ASME Section VIII Division I and National Board certified for discharge capacities.
• Standardized Connections: Features 3/8" x 3/8" NPTFE to Flare threading for straightforward replacement in existing piping arrays.

What is the purpose of the 3/8 inch NPTFE to flare configuration?
This specific NPTFE-Flr PRV configuration allows for a robust, leak-resistant connection at the inlet using National Pipe Taper Fuel threads while providing a standard flare connection for discharge piping, common in liquid receiver setups.

When should an AH15512 relief valve be replaced?
While designed to reseat after a discharge event, industry best practices dictate replacing the valve if debris, solder, or metal shavings accumulate under the disc, which can prevent a proper 100% seal.

Is this valve suitable for high-ambient temperature locations?
Yes, the AH15512 angle valve is rated for temperatures up to 300°F, allowing for stable performance on sun-exposed rooftops or in high-heat mechanical rooms.

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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.