Copeland Comfort Control (Alco) 097720 Valve

The Copeland Comfort Control (Alco) 097720 Valve, also identified as the Model EX5-U21 and cross-referenced with part number 800618, is a high-precision stepper motor driven electrical control valve engineered for demanding HVACR applications. Designed for versatile performance, this electronic expansion valve (EEV) manages refrigerant flow with exceptional accuracy via its 24VDC stepper motor, which provides a high-resolution linear drive to ensure stable suction pressure and superheat control. Featuring 5/8" x 7/8" sweat (ODF) connections, the EX5-U21 is built for durability with a stainless steel body and ceramic slide-gate mechanism that ensures a positive shut-off function, effectively acting as a solenoid valve and expansion valve in a single unit. This components' fast response time and wide modulation range make it a critical part for variable capacity systems and energy-efficient supermarket refrigeration or heat pump setups where maintaining precise evaporator load control is non-negotiable for system longevity.

Technical Benefits & Performance

• Dual-Function Capability: Integrates expansion and shut-off functions, eliminating the need for an additional liquid line solenoid valve in many configurations.
• Precise Flow Modulation: The Alco EX5 stepper motor provides 750 pulses for high-resolution positioning, ensuring linear flow characteristics from 10% to 100% capacity.
• Hermetic Construction: Fully welded stainless steel housing with copper fittings ensures leak-proof reliability and simplified brazing installation.
• Compatible Refrigerants: Engineered for use with R-410A, R-407C, R-134a, R-404A, and R-507, making it a versatile choice for modern refrigerant transitions.
• Bi-Directional Operation: Optimized for heat pump applications with symmetrical flow capabilities in both cooling and heating modes.

Common Questions & Installation Tips

Is the EX5-U21 a direct replacement for the EX-U21?
Yes, the 097720 (EX5-U21) is the direct technical successor and is interchangeable with earlier EX-U series models of the same capacity rating, provided the 5/8" x 7/8" ODF sizing matches.

What controller is required for this stepper motor valve?
This valve requires a bipolar stepper motor driver or a compatible Copeland EC3 series controller to convert the 24VDC signal into the precise pulse steps required for operation.

Can this valve be used as a Hot Gas Bypass Valve?
While primarily used as an expansion valve, the EX5 series' robust design and fast response time allow it to be utilized for high-side applications, including hot gas bypass and suction pressure regulation.

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.