Description
Danfoss 067N9412 Thermal Expansion Valve (Type TGEX 20) Overview
The Danfoss 067N9412 is a high-capacity, externally equalized thermal expansion valve (TXV) engineered for reliable refrigerant metering in commercial and industrial HVAC/R systems. Designed for use with R22 and R407C refrigerants, this Type TGEX 20 valve delivers precise superheat control across a broad range of operating conditions, making it an ideal choice for demanding cooling applications.
Key Features
- Valve Type: Thermal Expansion Valve (TXV), Type TGEX 20
- Refrigerant Compatibility: R22 / R407C
- System Capacity: 15 Ton
- Inlet Connection: 7/8″ ODF (straight body)
- Outlet Connection: 1-1/8″ ODF (straight body)
- Capillary Tube Length: 60 inches for flexible bulb placement
- Maximum Operating Pressure (MOP): 667 PSI
- Orifice Number: #16
- Equalization Type: Externally equalized for accurate superheat sensing in systems with significant evaporator pressure drop
- Includes bulb strap for secure thermal bulb mounting
Why External Equalization Matters
External equalization connects the sensing element reference pressure to the evaporator outlet rather than the valve outlet. This design compensates for pressure drop across the evaporator coil, ensuring consistent and accurate superheat control — critical in larger-tonnage systems where refrigerant pressure drop is significant.
Specifications
- SKU: 067N9412
- Brand: Danfoss
- Model Type: TGEX 20
- Inlet Size: 7/8″ ODF
- Outlet Size: 1-1/8″ ODF
- Body Style: Straight
- Capillary Tube: 60″
- Refrigerants: R22, R407C
- Capacity: 15 Ton
- MOP: 667 PSI
- Orifice: #16
- Equalization: External
- Includes: Bulb strap
Applications
- Commercial air conditioning systems using R22 or R407C refrigerant
- Retrofit and replacement applications requiring externally equalized TXV control
- Systems with multi-circuit or distributor-fed evaporator coils
- Large-tonnage direct-expansion (DX) cooling equipment
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