Description
Overview
The Copeland 066657 is a precision-engineered Thermal Expansion Valve (TXV) designed for reliable refrigerant metering in R22 residential and light commercial cooling systems. With a straight body configuration and external equalization, this valve delivers accurate superheat control across a capacity range of 1.5 to 3 tons, making it a versatile replacement or OEM solution for split-system air conditioners and heat pumps.
Key Features
- Refrigerant: R22 compatible
- Capacity range: 1.5–3 ton
- Inlet connection: 3/8″ sweat (ODF)
- Outlet connection: 1/2″ sweat (ODF)
- Body style: Straight body design for streamlined installation
- Equalization type: Externally equalized for accurate superheat control in longer or complex evaporator circuits
- Capillary tube length: 5 feet for flexible bulb placement
- Includes Chatleff and Aeroquip adapters for broad system compatibility
External Equalization Advantage
The external equalizer port senses evaporator outlet pressure directly, compensating for pressure drop across the evaporator coil. This results in more precise superheat regulation, improved system efficiency, and protection against compressor flooding — especially important in multi-circuit or distributor-fed evaporator applications.
Included Adapters
- Chatleff adapter: Enables connection to Chatleff-style service ports commonly found on older and OEM refrigeration systems
- Aeroquip adapter: Provides compatibility with Aeroquip-style fittings for flexible field installation options
Specifications
- SKU: 066657
- Brand: Copeland
- Refrigerant: R22
- System capacity: 1.5–3 ton
- Inlet size: 3/8″ sweat (ODF)
- Outlet size: 1/2″ sweat (ODF)
- Body configuration: Straight
- Equalization: External
- Capillary tube length: 5 feet
- Adapters included: Chatleff and Aeroquip
Applications
- R22 residential split-system air conditioners
- Light commercial cooling equipment
- Evaporator coil replacement and retrofit applications
- Systems requiring external equalization due to distributor or multi-pass evaporator coils
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