Control the refrigerant flow to the evaporator
The TU stainless steel thermostatic expansion valves allow you to control the refrigerant flow to the evaporator. The valve senses the refrigerant level and, when needed, injects liquid to keep the air conditioning system working at an optimum level.
View the 3D model
The TU valves are compact in design, light weight and have steel/copper bi-metal connections for fast soldering. The TU valves offer fixed or exchangeable orifices and adjustable or non-adjustable superheat settings, as well as internally or externally equalized designs. The TU valves are available in angle- or straight way designs and with many combinations of solder connections.
The TU valves ensure consistent function throughout the service life. The valves come with high dirt-retention filter and the TUA(E) versions with exchangeable filter, offer easy maintenance (or e.g.: cleaning of filter). For safe and reliable operation, the TU valves can be supplied with self-cleaning bleed or with a MOP charge.
Features and benefits
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Suited for all common refrigerants and applications
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Large operating range: N-range -40°C to +10°C / B-range -60°C to -25°C
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Stable regulation
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Compact design, low weight
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Stainless steel, hermetically tight solder version with high corrosion and vibration resistance
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Easy brazing with no need for wet wrapping
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Adjustable superheat
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Special non-adjustable superheat valves available
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Filter with high dirt-retention capacity
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Available with maximum operating pressure (MOP)

Documents
| Type | Name | Language | Valid for | Updated | Download | File type |
|---|---|---|---|---|---|---|
| Notification | Expansion Valves, Type TUA, TUAE - Installation Instructions | English | United States | 06 Jan, 2008 | 206.2 KB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Portuguese | Multiple | 06 Jun, 2018 | 7.1 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Polish | Multiple | 05 Jun, 2018 | 7.2 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Vietnamese | Multiple | 05 Jun, 2018 | 7.0 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | German | Multiple | 06 Jun, 2018 | 7.1 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Swedish | Multiple | 06 Jun, 2018 | 7.2 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Spanish, Castilian | Multiple | 05 Jun, 2018 | 7.0 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Spanish, Castilian | Spain | 23 Feb, 2024 | 7.5 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | English | Multiple | 24 Mar, 2025 | 2.2 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | French | France | 04 Jul, 2025 | 7.4 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Russian | Multiple | 05 Jun, 2018 | 8.4 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Polish | Poland | 28 Jul, 2022 | 6.8 MB | |
| Brochure | Overview Brochure Thermostatic Expansion Valves | Italian | Multiple | 16 Jan, 2024 | 7.2 MB | |
| Brochure | Overview Brochure: Thermostatic Expansion Valves | Chinese | Multiple | 05 Jun, 2018 | 7.2 MB |
Software

Coolselector®2 features unbiased calculations for the selection of refrigeration and air conditioning components based on the user’s requirements or based on standard operating conditions.

Ref Tools is the essential, all-in-one mobile app for air conditioning and refrigeration technicians. Get the tools, guidance, support, and information you need—on the job and in the field.
Access Refrigeration Slider, Low-GWP Tool, Magnetic Tool, Spare Parts, and Troubleshooter directly in Ref Tools using an easy-to-navigate interface.
Related products

TR 6 thermostatic expansion valves have been designed and developed with features especially for use in applications such as residential air conditioning systems, split systems, roof top units, heat pumps, light commercial air conditioning systems and chillers. The hermetic tight design meets environmental demands for today and the future. The TR 6 program is available for R22 and R410A, and models for other refrigerants can be produced to order.

TGE is an innovatively designed series of thermostatic expansion valves for fluorinated refrigerants. TGE has copper connections upgraded to high-pressure applications for hermetically tight soldering, and is available with a wide variety of connection types and sizes.

T2 / TE2 thermostatic expansion valves are used for liquid injection into evaporators on both refrigeration and air conditioning systems using fluorinated refrigerants. T2 / TE2 is supplied with an interchangeable orifice assembly for easy stocking and service.
Learning
Learn more about our TU thermostatic expansion valves
Case stories

The specific Danfoss components that Delfield used were the DCL filter drier, the TUB thermostatic expansion valve (TXV) for R-290, and the ERC electronic temperature controller. Each played a part in helping Delfield meet their goals.
News

Danfoss is celebrating the 25th anniversary of its popular TU stainless steel thermostatic expansion valve—trusted for the most demanding refrigeration applications by OEMs and installers worldwide.

The entire Danfoss portfolio of refrigeration components is now qualified for three A2L ultra-low GWP refrigerants: R454C, R455A, and R1234yf. This complements the previous qualification of the T2/TE expansion valves in July 2020.
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