Danfoss 068Z3407 Expansion Valve

The Danfoss 068Z3407 is a premium TE 2 thermostatic expansion valve designed specifically for commercial refrigeration and air conditioning systems. Engineered for high-efficiency refrigerant injection, this valve is optimized for use with R404A and R507A refrigerants. It features a robust brass body with an angleway flow configuration, incorporating a 3/8-inch flare inlet and a 1/2-inch solder outlet for secure, leak-resistant connection in the field. This externally equalized TXV ensures precise superheat control across a broad temperature range of -40°F to 25°F. With a Maximum Operating Pressure (MOP) of 75 psig (at 32°F) and a total working pressure rating of 500 psig, it provides the reliability needed for demanding evaporator loads. The 59-inch capillary tube allows for flexible bulb placement, ensuring the sensing bulb accurately monitors suction line temperature to prevent liquid slugging and maximize system performance.

Key Benefits for HVACR Technicians:

• Precise Superheat Regulation: The externally equalized design allows the Danfoss 068Z3407 to maintain optimal efficiency even in systems with significant pressure drops across the evaporator.
• Durable Construction: Built with a corrosion-resistant brass body and high-quality internals to withstand high-pressure environments up to 500 psig.
• Flexible Installation: Features a 59-inch capillary tube and an angleway design, making it easier to fit into compact air conditioning and refrigeration cabinets.
• System Protection: Integrated MOP (Maximum Operating Pressure) function prevents compressor overload during start-up or after defrost cycles.

Common Questions: What refrigerants are compatible with the Danfoss 068Z3407? This specific TE 2 expansion valve is calibrated for R404A and R507A systems. Using it with other refrigerants may result in improper superheat settings and potential compressor damage. Where should the sensing bulb be mounted? For optimal performance, the sensing bulb should be securely fastened to the horizontal section of the suction line immediately after the evaporator outlet. Use the included bulb strap to ensure maximum thermal contact. How does external equalization improve performance? The externally equalized port compensates for the internal pressure drop of the evaporator, ensuring the valve responds only to the actual superheat at the evaporator outlet, which is critical for large or multi-circuit coils.

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.