Danfoss TEA Thermostatic Expansion Valves for Ammonia
Danfoss TEA thermostatic expansion valves regulate the injection of liquid refrigerant into evaporators in industrial refrigeration systems. Injection is controlled by refrigerant superheat, making TEA valves ideal for liquid injection in "dry" evaporators where superheat at the evaporator outlet follows the evaporator load.
Wenzhou Phonetoo Electromechanical Co., Ltd. is an authorized Danfoss distributor in China. Contact us for availability, pricing and delivery time.
Key features
- Wide temperature range: –50 °C to +30 °C — suitable for both freezing and refrigeration systems
- Interchangeable orifice assemblies and thermostatic elements — easy capacity changes without replacing the whole valve
- Rated capacities: 3.5 – 295 kW (1 – 85 TR)
- External superheat setting — matches any evaporator for optimum utilization
- Patented double-contact bulb — fast, precise reaction to temperature changes; quick and easy to install with excellent heat transfer
- Withstands hot-gas defrosting effects; long-life throttling section in special alloy steel
- Approvals: DNV, CRN, BV, EAC, PED, RoHS (contact us for the current certificate list)
Technical data
| Parameter | TEA 20 | TEA 85 |
|---|---|---|
| Refrigerant | R717 (ammonia); Danfoss continuously evaluates additional refrigerants | R717 (ammonia) |
| Evaporating temperature range | –50 °C to +30 °C (two element ranges: –50–0 °C / –20–+30 °C) | –50 °C to +30 °C |
| Rated capacity | 3.5 – 70 kW (1 – 20 TR) | 115 – 295 kW (33 – 85 TR) |
| Max. working pressure (PS/MWP) | 19 bar | 19 bar |
| Max. test pressure | 28.5 bar | 28.5 bar |
| Capillary tube length | 5 m | 5 m |
| Max. bulb temperature | 100 °C | 100 °C |
| Connections | Weld flanges, external pressure equalization (¼ in. or Ø 6.5 / Ø 10 mm weld nipple) | Weld flanges, external pressure equalization |
| Valve housing material | GGG40.3 ductile iron | GGG40.3 ductile iron |
| Gaskets | Non-asbestos | Non-asbestos |
| Origin | Made in Denmark | Made in Denmark |
Rated capacities at –15 °C evaporating / +32 °C condensing temperature with approx. 4 K subcooling ahead of the valve.
Models & ordering
| Type | Rated capacity | Code no. (–50 to 0 °C) | Code no. (–20 to +30 °C) |
|---|---|---|---|
| TEA 20-1 | 3.5 kW (1 TR) | 068G6000 | 068G6137 |
| TEA 20-2 | 7 kW (2 TR) | 068G6001 | 068G6133 |
| TEA 20-3 | 10.5 kW (3 TR) | 068G6002 | 068G6134 |
| TEA 20-5 | 17.5 kW (5 TR) | 068G6003 | 068G6138 |
| TEA 20-8 | 28 kW (8 TR) | 068G6004 | 068G6139 |
| TEA 20-12 | 42 kW (12 TR) | 068G6005 | 068G6140 |
| TEA 20-20 | 70 kW (20 TR) | 068G6006 | 068G6135 |
| TEA 85-33 | 115 kW (33 TR) | 068G6007 | 068G6141 |
| TEA 85-55 | 190 kW (55 TR) | 068G6008 | 068G6142 |
| TEA 85-85 | 295 kW (85 TR) | 068G6009 | 068G6143 |
Separate orifice assemblies, thermostatic elements, and strainers are available — ask for the code number matching your capacity.
Applications
- Industrial ammonia refrigeration systems (food processing, cold storage, breweries, chemical plants)
- Freezing tunnels and cold rooms (–50 °C evaporating)
- Dry evaporators requiring precise superheat control
Datasheet downloads
Frequently asked questions
What is the Danfoss TEA expansion valve used for?
The TEA is a thermostatic expansion valve for ammonia (and fluorinated refrigerants) in industrial refrigeration. It regulates liquid injection into evaporators, with injection controlled by the refrigerant superheat — especially suitable for liquid injection in “dry” evaporators where outlet superheat follows the evaporator load.
What is the operating temperature range?
The TEA covers -50 °C to +30 °C, so it can be used in both freezing and refrigeration systems.
What capacities does the TEA range cover?
Rated capacities run from 3.5 to 295 kW (1 to 85 tons of refrigeration), covering small cold rooms up to large industrial evaporators.
What is the maximum working pressure?
The maximum working pressure (PS/MWP) is 19 bar (276 psig).
What does “interchangeable orifice assembly” mean?
Both the orifice assembly and the thermostatic element are interchangeable, so the valve capacity can be adapted to the duty without replacing the whole valve body — useful when system capacity changes.
How is the superheat set?
Superheat is set externally and can be matched to each evaporator for optimum utilization. The patented double-contact bulb is fast and easy to install and gives good temperature transfer from the suction tube to the bulb.
What connections does the TEA have?
The valve body has flange connections, plus a connection for external pressure equalization (1/4 in. or ø 6.5 / ø 10 mm weld nipple).
Is this a genuine Danfoss product? How long is delivery?
Yes. We are an authorized Danfoss industrial refrigeration distributor in China, listed in Danfoss China’s official authorized dealer directory. All valves are brand-new, genuine stock with valid warranty. We ship from China; express delivery takes about 1–2 weeks to most destinations worldwide.