Emerson Alco 055827 Expansion Valve

The Emerson Alco 055827 is a precision-engineered externally equalized thermal expansion valve designed for high-performance modulation in medium temperature refrigeration systems. Specifically built as Model HFES 1/2 HC, this valve features a straight body configuration with 3/8" x 1/2" ODF sweat connections, ensuring a leak-proof integration into your liquid line and evaporator inlet. Engineered for R22 and R407C capacity at a 1/2 ton nominal rating, it utilizes a HC medium temperature charge to maintain precise superheat control across varying load conditions. The inclusion of a 5' capillary tube providing ample length for flexible bulb placement. This unit serves as the direct replacement for EBFVE-AAA-C, making it a drop-in solution for legacy system repairs. The stainless steel power assembly protects against corrosion and fatigue, ensuring long-term reliability in demanding HVACR cycles and localized cooling applications.

• Precise Superheat Control: The external equalization feature compensates for pressure drops across the evaporator, preventing liquid slugging of the compressor.
• Versatile Refrigerant Compatibility: Optimized for R22/R407C systems, providing a reliable solution for older installations and retrofits.
• Durable Construction: Features a stainless steel diaphragm and power assembly to eliminate the risk of failure due to chemical corrosion or vibration.
• Simplified Installation: The 3/8 x 1/2 ODF sweat fittings and 5-foot capillary lead allow for easy positioning in tight mechanical cabinets.
• Direct OEM Matching: Functionally replaces the EBFVE-AAA-C, reducing field diagnostic time and ensuring system design specs are met.

Can the HFES 1/2 HC be used on a system with an internal distributor?
Yes. Because this is an externally equalized valve, it is the required choice for any evaporator using a refrigerant distributor, as it accurately senses the pressure at the evaporator outlet rather than the valve outlet.

What is the primary advantage of the HC medium temperature charge?
The HC charge is specifically calibrated for medium temperature applications, providing a stable response and preventing hunting at typical suction temperatures, unlike universal charges that may drift.

Is this valve compatible with POE or Mineral oils?
The valve construction is compatible with standard refrigeration oils used in R22 and R407C systems, provided the system is properly cleaned and the filter drier is replaced during the retrofit or repair.

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.