Emerson Alco 054140 Expansion Valve

For contractors servicing light commercial or residential systems, the Emerson Alco 054140 (Model HFE 5 1/2 HC 5FT 3/8 x 1/2 SAE ANG) is a high-performance thermostatic expansion valve engineered for precision refrigerant metering. This balanced port TXV is purpose-built to handle the shifting loads of R22 and R407C systems, providing a nominal 5.5-ton capacity. Its externally equalized design and angle body configuration make it ideal for high-efficiency air conditioning and heat pump applications where maintaining stable superheat is critical. The stainless steel power assembly ensures long-term reliability by resisting corrosion in harsh environments, while the 3/8" x 1/2" SAE flare connections allow for a secure, leak-free mechanical fit without the need for brazing in tight spaces.

• Balanced Port Design: Compensates for varying head pressures to ensure consistent mass flow and prevent hunting across a wide range of operating conditions.
• Multi-Refrigerant Compatibility: Dual-rated for R22 and R407C, making it a versatile drop-in replacement for retrofits and legacy system repairs.
• Angle Body Configuration: Specifically designed for 90-degree piping layouts, simplifying installation in compact evaporator housings.
• Externally Equalized: Features a dedicated external equalizer connection to accurately sense evaporator pressure, compensating for pressure drops across the coil.
• Medium Temperature Charge: The HC code charge is optimized for medium temperature applications, ensuring rapid response from the 5-foot capillary tube.

What is the primary benefit of the balanced port in this 5.5-ton HFE valve?
The balanced port design allows the valve to cancel out the forces exerted by high-side liquid pressure. This is essential for systems that experience fluctuating ambient temperatures or variable evaporator loads, preventing the valve from overfeeding or starving the coil.

Can I use this valve on a heat pump system?
Yes, the Emerson HFE series is designed for bi-directional flow in certain tonnages and is widely used in heat pump applications to control superheat in both heating and cooling cycles, provided the system capacity matches the 5.5-ton rating.

How do I ensure the external equalizer is installed correctly?
The external equalizer line must be connected to the suction line downstream of the sensing bulb. This ensures the thermostatic expansion valve reacts to the true pressure at the evaporator outlet, which is vital for preventing compressor floodback or evaporator starvation.

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.