Danfoss 068U1839 TXV

The Danfoss 068U1839 Thermostatic Expansion Valve (TXV) is a TUB series expansion valve engineered for tight superheat control in refrigeration and light commercial A/C systems. This specific model features a 1/4" ODF inlet and a 3/8" ODF outlet in an angleway configuration, utilizing bi-metal (stainless steel/copper) connections that simplify soldering by eliminating the need for wet-rag cooling during installation. Designed for R134a and R513A refrigerants, it operates within a temperature range of -40°F to 50°F (-40°C to 10°C) with a rated orifice capacity of 0.28 TR (1 kW). The internally equalized design and 59-inch (1500 mm) capillary tube provide reliable bulb placement and rapid response to evaporator load changes. With a maximum working pressure of 500 psig (34 bar) and an adjustable static superheat setting, the 068U1839 is built for professional technicians requiring long-term hermetic sealing and corrosion resistance in demanding environments.

• Hermetically Sealed Body: Laser-welded stainless steel construction prevents refrigerant leaks and ensures high pressure resistance up to 500 psig.
• Optimized Soldering: Bi-metal connections allow for direct brazing without specialized cooling techniques, reducing installation time in the field.
• Precise Superheat Adjustment: The adjustable static superheat allows for fine-tuning based on specific evaporator requirements to prevent liquid slugging.
• Dual-Refrigerant Compatibility: Field-ready for both R134a and R513A, making it a versatile stock item for modern low-GWP retrofits.
• Enhanced Durability: Stainless steel capillary tube and bulb assembly resist vibration and mechanical stress better than traditional copper components.

Is the Danfoss 068U1839 internally or externally equalized?
This model is internally equalized, making it suitable for systems where the pressure drop across the evaporator is negligible.

What is the maximum pressure rating for this TXV?
The maximum working pressure (MWP) is rated at 500 psig (34 bar), making it compliant with standard R134a and R513A system pressures.

Does this valve come with an orifice?
Yes, the TUB series features a fixed orifice integrated into the hermetic body, with this specific model rated at 0.28 Tons of Refrigeration (TR).

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.