Danfoss TEA 20, TEA 85 Data sheet

Data Sheet

Thermostatic expansion valves for ammonia Type TEA

Regulate and monitor ammonia and fluorinated 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 orifice 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

• Classification: DNV, CRN, BV, EAC etc. To get an updated list of certification 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 orifice assembly and thermostatic element. TEA is built up of three interchangeable main components:

•Thermostatic element (1)

•Orifice assembly (2)

•Valve body (3), with flange connections

The valve has external equalization. A separate outlet orifice 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 fitting the bulb quick and easy. The valves are able to withstand the effects 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 orifice 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 off 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 specific refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.

© Danfoss | Climate Solutions | 2021.02

AI172886422449en-000401 | 2

Thermostatic expansion valves for ammonia, Type TEA

Product speci€cations

Pressure and temperature

Table 1: Pressure and temperature

	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

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

Identification

Figure 1: Element label

MADE IN DENMARK

TEA 20/85 068G3053 R717

-20/+30 °C / -5/+85 °F

PB 19 bar/MWP 276 psig

BE0410B

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 orifice 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