Danfoss 068Z3208 TXV

The Danfoss 068Z3208 (TX 2) is a specialized thermostatic expansion valve engineered for precision refrigerant metering in air conditioning and refrigeration systems utilizing R-22. This direct-acting valve features a 3/8" x 1/2" flare connection, designed for a secure, leak-free seal without the need for brazing in tight field applications. Built with a laser-welded stainless steel power element, the 068Z3208 ensures long-term diaphragm integrity and consistent superheat control across varying evaporator loads. The internal equalization design makes it an ideal choice for systems with low pressure drops across the evaporator coil. Technicians favor the TX 2 series for its replaceable orifice assembly, which allows for field-adjustable capacity and simplifies maintenance. By maintaining an optimal refrigerant mass flow, this TXV protects the compressor from liquid slugging while maximizing heat exchange efficiency in residential and light commercial units.

Key Benefits for Technicians

• Interchangeable Orifice Design: Allows for precise capacity matching and easier field serviceability without removing the valve body.
• High-Grade Stainless Steel Element: Provides superior corrosion resistance and maintains calibration accuracy in demanding environments.
• Internal Equalization: Simplifies installation on systems where external pressure sensing is not required, reducing potential leak points.
• R-22 Optimization: Specifically calibrated for HCFC refrigerants to ensure stable superheat and prevent evaporator hunting.
• Flare Connection Seating: Provides a mechanical joint that withstands high-vibration scenarios while facilitating rapid component replacement.

Common Technical Questions

Can the Danfoss 068Z3208 be used for R-407C conversion?
While R-22 and R-407C share similar pressure-temperature profiles, the 068Z3208 is specifically charged for R-22. Converting to R-407C may result in superheat offset, and the power element charge must be verified against the specific glide characteristics of the replacement refrigerant.

How do I adjust the static superheat on this TXV?
The TX 2 features an adjustment spindle at the base. One full turn typically changes the superheat by approximately 4 degrees Celsius. Ensure the system has reached a stable state before making incremental adjustments.

Does this valve include the orifice assembly?
Standard Danfoss TX 2 bodies are typically sold separately from the orifice. Verify your required cooling capacity (tons) to select the appropriate orifice size (00 through 06) for this valve body.

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.