ICLX32-40D,ICLX50-65ANSI,ICLX100-150 Danfoss 2-step solenoid valve

ICLX32-40D,ICLX50-65ANSI,ICLX100-150 Danfoss 2-step solenoid valve product description

ICLX 2-step solenoid valves belong to the ICV
family.
ICLX are used in suction lines for the opening
against high differential pressure, e.g. after
hot gas defrost in large industrial refrigeration
systems with ammonia, fluorinated refrigerants
or CO 2 .
The ICLX valve is factory configured to open in 2
steps.
By following a simple procedure the valve can be
configured to open in 1 step only.
In 2-step configuration, step 1 opens to approx.
10% of the capacity after the pilot solenoid
valves are energized.
Step 2 opens automatically when the pressure
differential across the valve has decreased to
approx. 1.25 bar / 18 psig.
The ICLX valve comprises five main components:
Valve body, top cover, function module and
2 pilot solenoid valves. On ICLX 32 – 150 the
top cover and function module are factory-
assembled.

ICLX32-40D,ICLX50-65ANSI,ICLX100-150 Danfoss 2-step solenoid valve Function

The ICLX valve is used as a shut-off valve in
suction lines to open after hot gas defrost.
The valve is a pilot controlled valve operated by
an external pilot pressure source. This means that
the valve can operate with no internal pressure
differential (P d ) at all.
Low P d is the key objective and makes the ICLX
valve ideal for applications that are sensitive to
differential pressure.
Though P d is kept low, it can still be quantified,
and must be considered when choosing valve
size. See section - Selection of ICLX valve - for the
impact.
The main valve is provided with two pilot
solenoid valves, as well as a nipple for connection
to external pilot pressure.
The external pilot pressure line must be
connected to a system pressure (p2) which is
at least 1.5 bar / 20 psi higher than the inlet
pressure (p1) of the valve. The difference between
the external pilot pressure and the inlet pressure
of the valve defines the maximum opening
differential pressure (MOPD) of the ICLX.
Function
The ICLX is kept open when power is applied to
the coils placed on the EVM pilot solenoid valves
pos. 1 and pos. 2.
The ICLX is closing and kept closed when the
coils on EVM pilot solenoid valves pos. 1 and pos.
2 are de-energised.
The pilot solenoid valve (pos.1) allows
external pilot pressure (p 2 ) to the bottom of
the servo piston and thus opens the first step
corresponding to approx. 10% of the valve
capacity. At the same time the bleed spring
will be compressed. This will start a pressure
equalization of the inlet pressure (p 1 ) to the
outlet pressure. When the differential pressure
across the valve has fallen to approx. 1.25 bar /
18 psig the spring will be strong enough to
open the second step and open the valve for full
capacity.
This way high-pressure pulsations, which would
occur when opening for full capacity in one step,
can be avoided.
ICLX must not be used in pipe systems where
the differential pressure across the main valve
in open position can exceed 1 bar / 15 psig,
otherwise the step two on the valve will close.