Emerson Alco 054226 Expansion Valve

The Emerson Alco 054226 Expansion Valve (Model AFA 1/2 FC 3/8 X 3/8-1/2 SAE ANG) is a high-performance thermostatic expansion valve engineered for commercial refrigeration and air conditioning applications. Featuring a 1/2 ton R12 capacity, this internally equalized valve ensures precise refrigerant metering across variable evaporator loads. The angle body configuration with 3/8" x 3/8-1/2" SAE flare connections allows for versatile installation in tight mechanical spaces, such as walk-in coolers or refrigerated display cases. Built with a stainless steel power element, the 054226 is resistant to corrosion and mechanical fatigue, enhancing long-term system reliability. The medium temperature charge (Code C) is optimized for suction temperatures between -20°F and +50°F, while the included 5-foot capillary tube provides ample reach for remote bulb placement. Veteran HVACR technicians prioritize the AFA series for its external superheat adjustment, allowing for fine-tuned performance on-site to prevent liquid slugging and ensure maximum evaporator efficiency.

• Corrosion Resistance: Incorporates a stainless steel power assembly to prevent common failure points in high-moisture environments.
• Precise Control: Designed for stable superheat management across wide load ranges, ensuring optimal compressor protection.
• Ease of Service: Features wrench flats on inlet and outlet connections to prevent body distortion during torque application.
• Internal Equalization: Simplifies piping by eliminating the need for an external pressure line on systems without significant evaporator pressure drops.
• Debris Protection: Includes a replaceable inlet strainer to capture contaminants before they impact valve seating.

What is the maximum working pressure for the Emerson 054226?
This valve is rated for a maximum working pressure of 700 psig, making it suitable for modern high-pressure system requirements.

Can the superheat be adjusted on this model?
Yes, the AFA 1/2 FC features an adjustable superheat stem. Clockwise rotation increases superheat, while counter-clockwise rotation decreases it; one full turn typically adjusts superheat by approximately 3-4°F.

Is this valve compatible with refrigerants other than R12?
While designated as an R12 capacity valve, the C charge is often cross-compatible with R134a systems in medium-temperature applications, though capacity ratings may vary. Always verify specific mass flow requirements.

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.