Emerson Alco 048431 Expansion Valve

The Emerson Alco 048431 (AFA 1/2 RC) is a high-performance thermal expansion valve engineered for precision refrigerant flow control in low-tonnage refrigeration systems. Designed with an angle body configuration and SAE flare connections, this valve facilitates reliable performance in medium-temperature applications. It features a 1/2 ton capacity and is optimized for use with R404A, R507, and R502 refrigerants. The internally equalized design simplifies installation by eliminating the need for an external equalizer line, making it ideal for systems with low pressure drops across the evaporator. Equipped with a 5-foot capillary tube and a durable stainless steel power element, the 048431 ensures consistent superheat control and protects the compressor from liquid slugging. Its compact hermetic construction minimizes leak paths, providing long-term reliability for contractors servicing commercial reach-ins, ice machines, and food service equipment requiring refrigeration flow control.

• Broad Refrigerant Compatibility: Engineered for R404A, R507, and R502 medium-temperature applications.
• Simplified Installation: The internally equalized 3/8" x 3/8-1/2" SAE flare connections allow for fast field replacement.
• Durable Construction: Features a corrosion-resistant stainless steel power element to prevent diaphragmatic failure.
• Precise Superheat Management: Provides stable 1/2 ton metering to maintain optimal evaporator efficiency.
• Versatile Configuration: The angle body design and 60-inch capillary tube offer flexibility in tight mechanical footprints.

What is the primary application for the Emerson AFA 1/2 RC?
This TXV is specifically designed for medium-temperature refrigeration systems where a 1/2 ton capacity is required, commonly found in commercial food service and cold storage units.

Does this valve require an external equalizer line?
No, the 048431 is an internally equalized valve, which senses evaporator pressure at the valve outlet, making it suitable for systems without high-pressure-drop evaporators.

Can this valve be used with R134a?
This specific model is charged for R404A, R507, and R502. Using it with R134a may result in improper superheat settings and potential system instability.

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.