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.
