Danfoss 068U2319 Expansion Valve

The Danfoss 068U2319 Expansion Valve is a professional-grade TUAE series thermostatic expansion valve designed specifically for low-temperature commercial refrigeration applications. Engineered for use with R404A and R507A refrigerants, this valve features a robust stainless steel body and 3/8" x 1/2" ODF solder connections utilizing bi-metal technology for reliable, leak-free installation. The externally equalized design allows for precise superheat control even in high-load evaporators, maintaining a stable MOP point of -5°F (30 psig). With a temperature range of -75°F to -15°F, this Danfoss expansion valve delivers consistent performance in walk-in freezers and supermarket display cases. The 59-inch capillary tube provides significant flexibility for sensing bulb placement, while the laser-engraved flow indicator ensures proper orientation during field replacement or new system assembly.

Key Benefits for Technicians

• Corrosion-Resistant Construction: The stainless steel body provides superior durability in harsh environments compared to traditional brass valves.
• Precise Superheat Management: Features an adjustable superheat setting (factory set at 7.2°F) to fine-tune system efficiency.
• High Pressure Rating: Rated for a maximum working pressure of 500 psig (34 bar), making it compatible with a wide range of condensing units.
• Efficient Heat Transfer: The bi-metal connections allow for fast soldering without the need for extensive wet-wrapping, reducing installation time.
• Reliable Liquid Injection: Optimized for single-flow refrigeration circuits to prevent liquid floodback and protect the compressor.

Common Questions

What is the purpose of the MOP (Maximum Operating Pressure) on this valve?
The MOP point of -5°F / 30 psig protects the compressor motor by limiting the suction pressure during start-up or after a defrost cycle, preventing overload.

Can this valve be used for R134a or R22 systems?
No, the Danfoss 068U2319 is specifically calibrated for the pressure-temperature characteristics of R404A and R507A. Using it with incompatible refrigerants will result in improper superheat and potential system failure.

Is the sensing bulb strap included with the valve?
Yes, this TUAE expansion valve includes the necessary stainless steel bulb strap to ensure proper thermal contact between the bulb and the suction line.

Safety Notice – Proposition 65

This product contains chemicals known to the State of California to cause cancer or reproductive harm.
California Proposition 65 Warning

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.