Mueller Industries A17938 Check Valve

The Mueller Industries A17938 Check Valve is a veteran-grade 3/4 Magnetic Check Valve engineered for high-performance backflow prevention in commercial refrigeration and HVAC systems. Unlike standard spring-loaded designs, this CheckMaster magnetic check valve utilizes a magnetically operated poppet that eliminates the mechanical fatigue often associated with traditional springs. This design ensures a more reliable unidirectional flow with a pressure differential to open of less than 1 psig, making it a staple for technicians managing high-pressure systems. With a maximum working pressure of 800 psi and a robust operational temperature range of -40°F to 300°F, it is fully compatible with most modern refrigerants including R410A, R134A, R404A, and R507. The hermetically sealed copper body and solder connection provide a leak-proof interface, while the internal stainless steel disk and brass seat maximize corrosion resistance. This HVAC check valve is specifically designed to reduce pressure drop and minimize internal leakage to less than 6.6 ml/min, ensuring system efficiency in demanding industrial environments.

• Magnetic Poppet Design: Eliminates the need for springs, reducing mechanical wear and extending the operational life of the valve.
• High Pressure Resilience: Rated for a maximum working pressure of 800 psi, making it suitable for high-pressure refrigerant applications.
• Broad Fluid Compatibility: Engineered for use with mineral, naphthenic, and POE oils, as well as a wide array of HFC and HCFC refrigerants.
• Precision Performance: Boasts a Cv value of 7.2 and requires less than 1 psi to open, ensuring minimal impact on system head pressure.
• Durable Construction: Features a copper body with a stainless steel magnetic disk and internal screen for superior filtration and reliability.

Can this valve be installed in any orientation?
Yes, the magnetic operation allows for installation in both horizontal and vertical lines, though standard practice suggests following the flow arrow clearly marked on the copper body to ensure proper backflow prevention.

Does this valve require regular maintenance of the internal spring?
No, this is a magnetic check valve. By utilizing a magnetic field rather than a mechanical spring, it removes a common point of failure and reduces the overall maintenance requirements for the technician.

Is the A17938 compatible with R410A systems?
Absolutely. Its 800 psi rating and 300°F maximum temperature limit make it ideal for the high-pressure and high-temperature requirements of R410A refrigeration cycles.

This item is not eligible for free shipping.

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.