Emerson Alco 054979 Expansion Valve

The Emerson Alco 054979 (Model HFE 1 RC) is a high-performance externally equalized thermal expansion valve designed for precision refrigerant flow control in medium-temperature applications. Featuring a 3/8" x 1/2" SAE flare angle body configuration, this 1-ton nominal capacity valve utilizes a 5-foot capillary tube for versatile remote bulb placement. Engineered specifically for R502 systems, it serves as the direct technical replacement for BFSE-A-C series valves. The balanced port construction compensates for changes in head pressure, ensuring stable superheat control across varying evaporator loads. The medium temperature charge prevents compressor slugging and optimizes coil efficiency. Designed for rugged field use, the stainless steel power assembly resists corrosion. This TXV valve is essential for contractors maintaining legacy refrigeration racks or upgrading existing HVAC expansion valve systems where reliable refrigerant metering is critical for system longevity and thermal stability.

• Direct BFSE series replacement allows for seamless retrofits without extensive piping modifications.
• External equalization ensures accurate superheat sensing by compensating for pressure drops across the evaporator.
• Angle body flare connections simplify installation in tight mechanical closets and reach-in coolers.
• Balanced port design maintains consistent mass flow regardless of liquid line pressure fluctuations.
• R502 medium temp optimization provides reliable superheat regulation for commercial refrigeration duty.

Common HVACR Technical Questions

What is the primary benefit of the Emerson HFE 1 RC over standard TXVs?
The Emerson HFE 1 RC utilizes a balanced port design, which is critical for systems experiencing a wide range of operating conditions, ensuring the thermal expansion valve does not hunt during low-load periods.

Can the 054979 be used on systems other than R502?
This specific model is charged for R502 medium temperature applications; using it with mismatched refrigerants can lead to incorrect superheat settings and potential compressor damage.

Is the 5-foot capillary tube length fixed for this model?
Yes, the 054979 Emerson valve comes with a standard 5' capillary. Ensure the remote bulb is mounted on a horizontal suction line section for the most accurate refrigerant flow control.

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.