Emerson Alco 065623 Expansion Valve

The Emerson Alco 065623, specifically the AA 1/4 MC 5FT 1/4 x 1/2 ODF S/T, is a precision-engineered thermal expansion valve (TXV) designed for small-capacity refrigeration systems. This internally equalized expansion valve is optimized for R134a and R12 applications, delivering a nominal capacity of 1/4 ton. Featuring a medium temperature charge and a straight-through body configuration, it ensures stable superheat control across varying evaporator loads. The 5-foot capillary tube provides sufficient length for flexible sensing bulb placement, while the 1/4" x 1/2" ODF sweat connections facilitate a reliable, leak-free hermetic seal. Built for durability in commercial refrigeration environments, this Emerson AA series TXV utilizes a stainless steel power element to resist corrosion and prevent premature diaphragm fatigue. Technicians should ensure proper piping practices to maintain an accurate refrigerant flow control and prevent hunting during low-load conditions.

• Precise Superheat Regulation: The thermal expansion valve maintains consistent evaporator efficiency by accurately modulating refrigerant flow based on heat load.
• Compact Straight Body Design: Engineered for tight mechanical footprints, the straight-through layout simplifies line-set integration in small reach-in coolers.
• Hermetic Construction: The sweat ODF connections eliminate potential leak paths common in flare fittings, ensuring long-term system integrity.
• Application Versatility: Specifically calibrated for medium temperature ranges, making it ideal for food storage and commercial cooling sectors.

Is the Emerson 065623 compatible with modern refrigerants?
While originally designed for R12, this valve is primarily used in R134a refrigeration systems. Always verify that the oil type and pressure-temperature curves align with your specific refrigerant retrofit.

When should I choose an internally equalized valve over an externally equalized one?
This internally equalized valve is suitable for systems with low pressure drops across the evaporator. If your coil has a significant pressure drop or a distributor, an externally equalized model may be required.

What is the purpose of the medium temperature charge in this TXV?
The "MC" charge is designed to prevent "cross-ambient" issues, ensuring the sensing bulb maintains control over the valve even when the power head is colder than the bulb.

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.