Danfoss Thermostatic expansion valves Types TX2/TEX2/TES2/TEN2 introduction

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 is

proportional to the evaporator load.

Danfoss Thermostatic expansion valves Types TX2/TEX2/TES2/TEN2 Features

y Large temperature range

– Equally applicable to freezing, refrigeration

and air conditioning applications.

y Interchangeable orifice assembly

– easy storage

– easy capacity matching

– better service.

– easy cleaning and replacement of filter

y Rated capacities from 1 to 20.5 kW /

0.3 to 5.8 TR for R407C

y Can be supplied with MOP (Max. Operating

Pressure).

– Protects the compressor motor against

excessive evaporating pressure during

normal operation

y Stainless steel bulb and Danfoss patented

bulb strap

– Fast and easy to install

– Good temperature transfer from pipe to

bulb

y Valves for special temperature ranges can be

supplied

y Design protected

Danfoss Thermostatic expansion valves Types TX2/TEX2/TES2/TEN2 Identification

The thermostatic element has laser engraved

data on top of the diaphragm. This engraving

gives valve type (with code number), evaporating

temperature range, MOP point, refrigerant, and

max. working pressure. PS/MWP.

T2 = internal equalization

TE2 = external equalization

Production place and date

N4511A =

N  = Nordborg, Denmark

(BE = Wuqing, China)

45 = week

11 = 2011

A  = Monday

Orifice assembly for T2 and TE2

The orifice assembly is marked with the orifice

size (e.g. 06) and week stamp + last number in

the year (e.g. 174).

The orifice assembly number is also given on the

lid of its plastic container.

Capillary tube label for T2 and TE2

The label gives the orifice size (04) and consists

of the lid of the orifice assembly plastic container.

It can easily be fastened around the expansion

valve capillary tube to clearly identify the valve

size.

Danfoss Thermostatic expansion valves Types TX2/TEX2/TES2/TEN2 Design Function

General

T2 and TE2 valves have an interchangeable orifice

assembly.

The orifice assembly is suitable for all versions of

valve body and refrigerants and in all evaporating

temperature ranges.

The charge in the thermostatic element depends

on the refrigerant and evaporating temperature

range.

The valves are available with internal (T2) or

external (TE2) pressure equalization.

External pressure equalization should always be

used on systems with liquid distributors.

The bulb gives fast and precise reaction to

temperature changes in the

evaporator. The bulb is fixed with a Danfoss

patented bulb strap for quick, easy and reliable

connection. The valves are able to withstand

the effects that normally occur with hot gas

defrosting.

To ensure long operating life, the valve cone and

seat are made of a special alloy with particularly

good wear qualities.