Emerson Alco 058923 Expansion Valve

The Emerson Alco 058923 Expansion Valve (Model AACE 1 1/2 HCA) is a high-performance thermal expansion valve engineered for 1.5-ton R22 or R407C air conditioning and heat pump systems. This externally equalized TXV features an internal check valve, making it a critical component for heat pump applications by allowing reverse flow without the need for additional bypass piping. The AACE series utilizes a stainless steel power element to resist corrosion and prevent premature diaphragm fatigue. With 3/8" x 1/2" ODF sweat connections and a 5-foot capillary tube, this straight-body valve ensures precise refrigerant metering across varying load conditions. The HCA charge is specifically designed to provide consistent superheat control in heat pump systems, minimizing liquid slugging and protecting the compressor. For those replacing older Alco expansion valves, this unit offers the reliable ODF refrigerant flow control required for professional-grade HVACR maintenance.

• Internal Check Valve: Eliminates the need for external bypass components in heat pump applications.
• Material Integrity: Stainless steel power assembly provides superior resistance to corrosion and mechanical stress.
• Precise Metering: Designed for 1.5-ton capacity with R22/R407C refrigerants to maintain optimal evaporator efficiency.
• External Equalization: Compensates for pressure drops across the evaporator to ensure accurate superheat settings.
• Installation Ready: Features 3/8" x 1/2" ODF sweat connections and a 5' capillary tube for flexible positioning.

Can I use this TXV on a standard AC-only system?
Yes, while the HCA charge and internal check valve are optimized for heat pumps, this valve functions effectively as a metering device in standard R22 or R407C air conditioning units of matching tonnage.

Is the external equalizer connection required for this model?
Yes, the AACE 1 1/2 HCA is an externally equalized TXV. The 1/4" SAE connection must be piped to the suction line after the bulb to ensure the valve senses accurately.

What is the purpose of the 5-foot capillary tube?
The extended capillary length allows for strategic placement of the sensing bulb on the suction line, which is essential for accurate thermal feedback in cramped or custom air handler configurations.

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.