Danfoss TEAT 20, TEAT 85 Data sheet

Data Sheet

Desuperheating valve
Type TEAT

Used to inject refrigerant into the suction line of the refrigeration system

Refrigerant injection into the suction line

TEAT valves are used to inject refrigerant into
the suction line of the refrigeration system to
reduce the high discharge temperatures that
can occur when the system operates with
highly superheated suction vapour.

This applies when, for example:

• A compressor runs either with low suction
pressure or with high condensing
temperature

• A compressor runs with both low suction
pressure and high condensing temperature.
This applies especially to systems with R 22

• A compressor receives highly superheated
suction vapour

• A compressor runs with capacity regulation
by hot gas bypass

Two-stage refrigeration plant

TEAT valves are also used in two-stage
refrigeration plant to control liquid injection
into the intercooler. The bulb is installed on the
discharge line from the highpressure
compressor. The theoretically obtainable
discharge temperature for given operating
conditions can be found in the h, log p diagram
for the refrigerant concerned.

Temperature regulation of the medium

TEAT valves have a further application: the
temperature regulation of the medium, e.g. the
temperature of the oil in a screw compressor.

AI172886419299en-000501

Desuperheating valve, Type TEAT

Features

• Refrigerants Applicable to HCFC, non ammable HFC and R717 (Ammonia)

• Regulation ranges: See ordering table

• 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

© Danfoss | Climate Solutions | 2021.02 AI172886419299en-000501 | 2

Desuperheating valve, Type TEAT

Functions

Figure 1: TEAT

Temperature variations in the discharge pipe where the bulb is placed act on the thermal charge in the bulb (12).
This changes the pressure in the thermostatic element (1) and thus gives modulating liquid injection.

If leakage in the thermostatic element does occur, it will not result in refrigerant loss.

The thermostatic element is screwed to the intermediate section (11) of the valve. A bellow on the intermediate
section means that the suction pressure cannot inuence the valve setting.

The movement of the setting spindle (4) is transferred through a gearwheel mechanism.

The orice assembly (2) is identical to that of TEA thermostatic expansion valves.



NOTE:

The TEAT is not able to close completely tight, so a solenoid valve is needed to shut o liquid supply, when the
system stops.

© Danfoss | Climate Solutions | 2021.02 AI172886419299en-000501 | 3