Danfoss TEA 20, TEA 85 Data sheet

Data Sheet

Thermostatic expansion valves
for ammonia Type TEA

Regulate and monitor ammonia and uorinated refrigerants
in industrial refrigeration systems

Thermostatic expansion valves regulate the
injection of refrigerant liquid into evaporators.
Injection is controlled by the refrigerant
superheat.

Therefore the valves are especially suitable for
liquid injection in „dry“ evaporators where the
superheat at the evaporator outlet follows the
evaporator load proportionally.

Features:

• Large temperature range: -50 °C – +30 °C Can
be used in both freezing and refrigeration
systems

• Interchangeable orice assemblies

• Interchangeable thermostatic element

• Rated capacities from 3.5 – 295 kW, 1 – 85
tons (TR)

• External superheat setting Can be matched to
all evaporators to give optimum evaporator
utilization

• Patented double contact bulb Fast and easy
to install. Good temperature transfer from
tube to bulb

• Classication: DNV, CRN, BV, EAC etc. To get
an updated list of certication on the
products please contact your local Danfoss
Sales Company

AI172886422449en-000401

Thermostatic expansion valves for ammonia, Type TEA

Functions

TEA is equipped with interchangeable orice assembly and thermostatic element. TEA is built up of three
interchangeable main components:

• Thermostatic element (1)

• Orice assembly (2)

• Valve body (3), with ange connections

The valve has external equalization. A separate outlet orice assembly (10) is for use with TEA 20-1 (3.5 kW) only.

The double contact bulb gives fast and precise reaction to temperature changes in the evaporator suction line, even
with much reduced evaporator load. It also makes tting the bulb quick and easy. The valves are able to withstand
the eects that normally occur with hot gas defrosting.

The movement of the setting spindle is transferred by a gearwheel mechanism that ensures smooth superheat
setting. The throttling section of the orice assembly has a long operating life, the valve cone and seat being made
of a special alloy steel with particularly good wear qualities.

NOTE:



The TEA is not able to close completely tight. Consequently a solenoid valve is needed to shut o liquid supply
when systems stops.

Media

Refrigerants

Refrigerant R717 - NH3(Ammonia)

New refrigerants

Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.

When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the
refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic
refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

© Danfoss | Climate Solutions | 2021.02 AI172886422449en-000401 | 2

Evaporating temperature range

D: -50 °C – 0 °C

P: -20 °C – 30 °C

Capillary tube length:

5 m

Max. bulb temperature

100 °C

Max. working pressure

PS/MWP = 19 bar

Max. test pressure

28.5 bar

Element label

MADE IN DENMARK

PB 19 bar/MWP 276 psig

BE0410B

TEA 20/85

068G3053

R717

-20/+30 °C / -5/+85 °F

Thermostatic expansion valves for ammonia, Type TEA

Product specications

Pressure and temperature

Table 1: Pressure and temperature

NOTE:



Connection for external pressure equalization 1⁄4 in. or ∅ 6.5 / ∅ 10 mm weld nipple. An 8 mm self-cutting union
can also be used.

Design

Materials

Valve housing made of GGG40.3
Gaskets are non asbestos

Identication

Figure 1: Element label

The thermostatic element

Has a white label attached to its top. The colour refers to the refrigerant for which the valve is designed: R 717
(Ammonia).

The orice assembly

is marked with

− valve type (TEA 20)

− rated capacity (8 TR = 28 kW)

− refrigerant R717 (NH3)

− date stamp

© Danfoss | Climate Solutions | 2021.02 AI172886422449en-000401 | 3