Mueller A14841 Straight Valve

The Mueller A14841 Straight Valve is a 1/2" ODS packless diaphragm valve engineered for critical isolation in refrigeration and air conditioning systems. Part of the Mueller Streamline Linemaster series, this 1/2" solder valve features a forged brass body designed with full-size openings to ensure maximum flow capacity and minimal pressure drop across the line. To provide a superior atmospheric seal, the internal assembly utilizes two stainless steel diaphragms and one phosphor bronze diaphragm, delivering positive isolation without the leak risks associated with traditional packed stems.

This HVAC refrigerant shutoff valve is built to withstand rigorous field conditions, supporting a maximum working pressure of 700 psig when flow is in the direction of the body arrow. It is fully compatible with all CFC, HCFC, and HFC refrigerants and their associated oils. The unit includes a thermally stable handwheel, allowing for consistent manual operation across an expansive temperature range from -40°F to 300°F. For technicians concerned with moisture management, the counterseat design effectively prevents environmental intrusion during operation, maintaining system chemistry integrity.

• Superior Leak Protection: Triple diaphragm construction (stainless steel and phosphor bronze) eliminates stem packing leaks and ensures a leak-free refrigeration valve performance.
• Maximum Flow Efficiency: Forged brass body with full-port openings reduces turbulence and pressure drop in the liquid or suction line.
• Broad Refrigerant Compatibility: Rated for use with modern high-pressure refrigerants and traditional oils, making it a versatile stock item for various service calls.
• Robust Temperature Range: Reliable mechanical operation in extreme environments, rated from -40°F for low-temp racks up to 300°F for discharge line applications.

What is the pressure rating for reverse flow?
While the valve is rated for 700 psig in the direction of the arrow, the maximum working pressure against the flow direction is 358 psig.

Does this valve require disassembly before brazing?
As with all diaphragm valves, technicians should use a wet rag or heat sink on the body and ensure the valve is in the open position to protect the internal diaphragms and seals from excessive heat during the soldering process.

Is this valve UL listed?
Yes, the A14841 is UL/cUL recognized and CE certified, meeting industry standards for safety and pressure containment.

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.