Description
Danfoss 067N3159 Thermal Expansion Valve (Type TGEL 20) — Overview
The Danfoss 067N3159 is a heavy-duty, externally equalized thermal expansion valve (TXV) engineered for R410A refrigerant systems with capacities up to 15 tons. Designed as a Type TGEL 20, this valve delivers precise refrigerant metering and reliable superheat control in demanding commercial HVAC and refrigeration applications. The straight body configuration and generous 60-inch capillary tube provide flexible installation options across a wide range of equipment layouts.
Key Features
- Refrigerant: R410A compatible
- Capacity: 15 Ton
- Body Style: Straight body configuration
- Inlet Connection: 5/8″ ODF
- Outlet Connection: 7/8″ ODF
- Capillary Tube Length: 60 inches for flexible bulb placement
- Maximum Operating Pressure (MOP): 667 PSI — protects against compressor overload at startup
- Equalization: Externally equalized for accurate superheat control in systems with significant pressure drop across the evaporator
- Orifice Number: #12.5 for optimized refrigerant flow at rated capacity
- Includes bulb strap for secure thermal bulb mounting
- Valve Type: TGEL 20
Technical Specifications
- SKU / Part Number: 067N3159
- Brand: Danfoss
- Refrigerant: R410A
- System Capacity: 15 Ton
- Inlet Size: 5/8″ ODF
- Outlet Size: 7/8″ ODF
- Capillary Tube Length: 60″
- MOP Rating: 667 PSI
- Orifice: #12.5
- Equalization Type: External
- Body Style: Straight
- Valve Series: TGEL 20
- Includes: Bulb strap
Application & Benefits
The external equalization port on the Danfoss 067N3159 makes it the right choice for evaporators with a measurable pressure drop from inlet to outlet — a common condition in larger commercial systems. By referencing evaporator outlet pressure directly, the valve maintains consistent superheat regardless of load fluctuations, protecting the compressor and maximizing system efficiency. The 667 PSI MOP setting prevents liquid floodback during high-load or startup conditions, a critical safeguard for R410A systems operating at elevated pressures. The 60-inch capillary tube gives installers ample reach to position the sensing bulb at the ideal location on the suction line, while the included bulb strap ensures a secure, thermally conductive connection. The #12.5 orifice is factory-matched to the 15-ton capacity rating, ensuring the valve is ready for installation without field modification.
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