Danfoss 068U2237 Element/Valve

The Danfoss 068U2237 is a TUAE thermostatic expansion valve engineered for precise liquid injection into evaporators across commercial refrigeration and air conditioning installations. This externally equalized TXV is optimized for R22 and R407C systems, featuring a 3/8 inch x 1/2 inch ODF solder connection. Constructed with a high-grade stainless steel body and a bimetal capillary tube, it provides superior corrosion resistance and thermal stability. The adjustable superheat setting, with a static factory calibration of 7.2°F (4°C), allows technicians to fine-tune system performance to match specific evaporator loads. With bi-flow capability and a temperature range of -40°F to 50°F, this valve is a versatile choice for HVACR contractors requiring reliable refrigerant flow control. Its 59-inch capillary tube ensures flexibility during installation in tight evaporator housings.

Key Benefits for Contractors

• Corrosion Resistance: The stainless steel construction prevents rust and degradation in high-moisture environments, ensuring long-term seat integrity.
• System Versatility: Dual refrigerant compatibility with R22 and R407C makes it an ideal stock item for both legacy maintenance and modern retrofits.
• Bimetal Connections: Laser-welded bimetal connectors allow for fast, easy soldering without the need for wet-ragging the valve body.
• Precise Regulation: The external equalization compensates for pressure drops across the evaporator, maintaining accurate superheat even in large-scale systems.

Common Questions

Can the Danfoss 068U2237 be used in heat pump applications?
Yes, the TUAE series features bi-flow technology, allowing it to function efficiently in both cooling and heating cycles without needing a separate bypass check valve.

What is the purpose of the 1/4 inch ODF equalization line?
The external equalizer monitors pressure at the evaporator outlet, ensuring the thermostatic expansion valve (TXV) maintains the correct superheat regardless of the pressure drop through the distributor or evaporator coils.

Is the orifice replaceable on this model?
The TUAE 068U2237 features an integrated, laser-engraved orifice designed for specific tonnage ranges (typically 1-8 depending on the specific system configuration); always verify the engraved flow arrow and orifice size during installation.

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.