Description
The Copeland 066661 is a precision-engineered Thermal Expansion Valve (TXV) designed for reliable refrigerant metering in R410A systems rated at 2-ton capacity. Featuring an externally equalized design, this straight-body valve compensates for pressure drop across the evaporator, ensuring accurate superheat control and optimal system efficiency across a wide range of operating conditions.
Equipped with a 5-foot capillary tube for flexible bulb placement, the 066661 ships complete with both Chatleff and Aeroquip adapters, giving technicians versatile connection options right out of the box. The 3/8″ inlet x 1/2″ outlet sweat connections provide clean, leak-free brazed joints compatible with standard copper line sets.
Key Features
- Refrigerant: R410A compatible
- Capacity: 2 Ton
- Connection Type: Sweat (braze) — 3/8″ inlet x 1/2″ outlet
- Body Style: Straight body configuration
- Capillary Tube Length: 5 feet for flexible remote bulb placement
- Equalization: Externally equalized for accurate superheat control with higher-pressure-drop evaporators
- Included Adapters: Chatleff and Aeroquip adapters included
Why External Equalization Matters
Externally equalized TXVs reference evaporator outlet pressure directly, rather than inlet pressure. This design is essential when evaporator pressure drop is significant, preventing hunting, flooding, or starving of the coil — all of which reduce system efficiency and can damage the compressor.
Applications
- Residential and light commercial split-system air conditioners
- Heat pump systems using R410A refrigerant
- Retrofit and replacement applications requiring a 2-ton TXV with sweat connections
- Systems requiring Chatleff or Aeroquip adapter compatibility
Specifications
- Brand: Copeland
- SKU / Part Number: 066661
- Refrigerant: R410A
- Nominal Capacity: 2 Ton
- Inlet Connection: 3/8″ Sweat
- Outlet Connection: 1/2″ Sweat
- Body Style: Straight
- Capillary Tube: 5 Feet
- Equalization Type: External
- Included Adapters: Chatleff and Aeroquip
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