Danfoss 068Z3402 Expansion Valve

Field-proven and reliable, the Danfoss 068Z3402 is a dedicated TS2 thermostatic expansion valve engineered for precision refrigerant metering in medium and low-temperature refrigeration systems. Designed specifically for R404A and R507 systems, this valve utilizes an internal equalization port, making it ideal for compact evaporators where pressure drop across the distributor is minimal. The 3/8" x 1/2" flare connections ensure a secure, leak-free mechanical interface, favoring fast field replacements without brazing. Featuring a stainless steel power element and a laser-welded diaphragm, this HVACR expansion valve maintains consistent superheat settings even under fluctuating ambient conditions. For contractors, the replaceable orifice assembly provides significant versatility, allowing for precise capacity matching to the load requirements. This refrigeration TXV ensures optimal evaporator coil utilization, preventing liquid slugging and protecting the compressor in demanding commercial applications.

Technical Benefits for Contractors

• Interchangeable Orifice Design: Simplifies inventory management and allows for precise capacity tuning based on system load.
• Stainless Steel Power Element: Enhances durability and corrosion resistance in harsh mechanical environments.
• Internal Equalization: Streamlines installation by eliminating the need for an external pilot line on smaller evaporator circuits.
• R404A/R507 Optimization: Factory-calibrated for high-pressure refrigerants common in commercial walk-ins and reach-in coolers.

Common Installation Questions

What is the temperature range for this specific TS2 valve?
The Danfoss 068Z3402 is designed for the N-range, typically covering evaporating temperatures from -40°F to +50°F (-40°C to +10°C).

Does this valve include the orifice?
Standard TS2 valve bodies are sold separately from the orifice. Ensure you select the correct orifice size based on your specific tonnage requirements.

Can I use this on a system with a large pressure drop?
If your evaporator uses a distributor or has a significant internal pressure drop, an externally equalized valve (TES2) is recommended over this internally equalized model to ensure accurate superheat control.

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.