Emerson Alco 047753 Expansion Valve

The Emerson Alco 047753 (Model AFA 1/4 FC 1/4 X 3/8-1/2 SAE ANG) is a purpose-built thermostatic expansion valve engineered for precision refrigerant metering in small-capacity refrigeration systems. This internally equalized TXV features an angle body configuration with 1/4" x 3/8-1/2" SAE flare connections, making it a reliable drop-in for legacy R12 systems or compatible retrofit applications. With a 1/4 ton capacity and a medium temperature charge, it maintains stable superheat control across varying evaporator loads. The inclusion of a 5-foot capillary tube provides the flexibility needed for remote sensing bulb placement in tight mechanical footprints. Designed for durability and consistent mechanical response, this Alco AFA series valve ensures optimal evaporator efficiency and compressor protection by preventing liquid slugging through accurate mass flow regulation.

• Precise Superheat Regulation: The FC medium temperature charge is optimized for stable performance in standard refrigeration ranges.
• Versatile Installation: The SAE flare angle body design allows for easier torque application and leak-free seating in confined spaces.
• Robust Construction: Features a high-integrity stainless steel power assembly to resist corrosion and prevent charge loss.
• Reliable Legacy Support: Specifically rated for R12 refrigerant applications, ensuring accurate 1/4 ton flow rates without hunting.

Is the Alco 047753 compatible with modern refrigerants?
While originally rated for R12, compatibility depends on pressure-temperature (PT) chart alignment and oil compatibility; always verify the thermostatic charge characteristics before retrofitting.

What are the benefits of an internally equalized valve in this application?
The internally equalized design simplifies installation by eliminating the need for an external sensing line, ideal for systems with low pressure drops across the evaporator.

How should the sensing bulb be mounted for maximum accuracy?
Secure the bulb to a horizontal section of the suction line at the 4 o'clock or 8 o'clock position to ensure it reads vapor temperature rather than oil or liquid refrigerant at the bottom of the pipe.

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.