Danfoss 068Z3403 Expansion Valve

When you are servicing R404A refrigeration systems, you need a valve that handles the high-pressure demands of commercial cooling. The Danfoss 068Z3403 is a TE 2 series thermostatic expansion valve designed for precise liquid injection into evaporators. This externally equalized TXV features an angleway brass body with 3/8" flare inlet and 1/2" flare outlet connections, providing a robust metal-to-metal seal essential for high-vibration applications. Engineered with a 59-inch capillary tube and a stainless steel power head, this valve maintains consistent static superheat (factory set at 7.2°F/4°C) across a broad temperature range of -40°F to +50°F. The 068Z3403 is a body-only component, allowing contractors to customize the refrigeration capacity from 0.2 to 5.75 tons by selecting the appropriate interchangeable orifice. This flexibility makes it a staple for walk-in coolers, supermarket display cases, and transport refrigeration where R404A or R507A refrigerants are utilized.

• Modular Flexibility: Compatible with Danfoss 1 to 20 kW orifices to precisely match system load requirements.
• External Equalization: Features a 1/4" flare pressure equalization connection to ensure accurate superheat control in systems with high pressure drops.
• Extreme Durability: The laser-welded stainless steel power head prevents refrigerant leaks and ensures long-term bulb sensitivity.
• Serviceable Design: Field-replaceable filter and orifice assembly allow for rapid maintenance without removing the entire valve body from the line.
• High Pressure Rating: Rated for a Maximum Working Pressure of 500 psig (34 bar), making it suitable for modern high-pressure refrigerant cycles.

Is the orifice included with the 068Z3403?
No, this is the expansion valve body and power head assembly only. You must select and purchase the orifice separately based on your specific tonnage requirements.

Can I use this valve with R22 or R134a?
This specific model is charged for R404A and R507A. Using it with other refrigerants will result in incorrect bulb pressure and improper superheat regulation.

What is the purpose of the external equalizer on this TE2 valve?
The externally equalized connection compensates for pressure drops across the evaporator, ensuring the valve maintains the correct evaporator superheat even in large or multi-circuit systems.

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.