Danfoss ICS 100-150 Pilot Operated Servo Valve Installation Guide
- June 3, 2024
- Danfoss
Table of Contents
ICS 100-150 Pilot Operated Servo Valve
Installation Guide
ICS 100-150 Pilot Operated Servo Valve
Installation
- Mounting orientation
- Direction of flow
- Removing function module with eyebolt
- Exploded view
- Insert orientation
- Welding
- Torque specification
| Valve body size| Nm| ft lb
---|---|---|---
Pos. A| 100-150| 220| 162
Pos. B| 100-150| 25| 18
Pos. C| 100-150| 50| 37
Maintenance
Module torque specification
Exploded view of function
module
- Piston
- Spring
- Insert
- Cone
- Valve plate
- Washer plate
Installation
Refrigerants
Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2).
Flammable hydrocarbons are not recommended.
The valve is only recommended for use in closed circuits. For further
information please contact Danfoss.
Temperature range
-60 °C – +120 °C (-76 °F – +248 °F)
Pressure range
The valves are designed for a max. working pressure of 52 bar (754 psig).
Technical data
The ICS can be used in suction, liquid, hotgas and liquid/vapor lines. The ICS
regulates the flow of the media by modulation or on/off function, depen ding
on the control impulse from the screwed on pilot valve or valves.
Regulating range
Dependent on the chosen type and combination of pilot valves.
Opening differential pressure (p)
The ICS main valve requires a minimum opening differential pressure of 0.07
bar (1 psi) to begin to open and 0.2 bar (2.9 psi) to be completely open.
Back pressure to the ICS valve forces the piston to open and create a reverse
flow. If reverse flow is not accepted, a check valve must be installed
downstream of the ICS valve (be aware of the risk of trapped liquid).
Design (fig. 4)
- Body
- Top cover
- Function module
- Gasket
- Bolts
- Plug
- Eye bolt
- Manual operating spindle
- ⅜ NPT plug (available on certain valve bodies)
Installation
The valve must be installed with the manual opening in vertically upwards
position (fig. 1).
The valve must be installed with the arrow in the direction of the flow and
the top cover upwards (fig. 2). The top cover can be rotated in any direction.
The valve is fitted with a spindle for manual opening. The spindle can open
the ICS 100-150 valves against a differential pressure of 10 bar (154 psi). If
an external pilot valve is used, the pilot line must be connected to the upper
side of the main line so that any dirt and oil from the plant will not find
its way into the pilot line.
If the ICS is to be used as a solenoid valve in a liquid line, external
control pressure cannot be recommended because it can cause liquid hammer. The
valve is designed to withstand a high internal pressure. However, the piping
system should be designed to avoid liquid traps and reduce the risk of
hydraulic pressure caused by thermal expansion.
It must be ensured that the valve is protected from pressure transients like
“liquid hammer” in the system.
Welding (fig. 3, 4 and 6)
The valve can stay assembled during the welding process provided that the
welding method is controlled and ensuring no welding debris.
The function module can be lifted out using a bolt size M10 or by using one of
the eyebolts placed in the topcover (fig 4, pos. 7). Debris blocking the bolt
hole will need to be removed.
The internal surfaces and weld connections of the enclosed ICS/ ICM valve have
been applied with an anti-corrosion treatment.
In the event that the function modules are to be left disassembled for any
length of time, please ensure that the function modules are further protected
by placing in a polyethylene bag or by applying a rust protection agent (e.g.
refrigeration oil or BRANOROL) on the surfaces.
Only materials and welding methods, compatible with the valve body material
must be used. The valve should be cleaned internally to remove welding debris
on completion of welding.
Avoid welding debris and dirt in the valve body and the function module. The
valve body must be free from stresses (external loads) after installation.
The valves must not be mounted in systems where the outlet side of the valve
is open to atmosphere. The outlet side of the valve must always be connected
to the system or properly capped off, for example with a welded-on end plate.
Assembly and tightening (fig. 5 and 7)
Remove welding debris and any dirt from pipes and valve body before assembly.
Check that the o-rings are intact before installing the function module. If
possible, apply some refrigeration oil to ease the insertion and to protect
the o-rings. Check that the top gasket has not been damaged. If the surface
has been damaged or the gasket has been bent, it must be replaced.
During insert of the function module make sure it is rotated like shown in
fig. 5
None of the 4 vertical legs are allowed to be positioned in the middle of
the connection opening.
The legs must be rotated to be within 30 to 60 degrees from middle
position.
Make sure the insert is in-line with the housing and fully at the bottom (no
angle – no partial protrusion).
The gasket has to fit easy with no gaps.
Tighten the top cover with a torque wrench to the values stated in fig. 7.
Colours and identification
The ICS valves are Zinc-Chromated from factory. The Zinc-Chromatization does
not cover the welding connections. If further corrosion protection is
required, the valves can be painted.
Precise identification of the valve is made via the ID plate on the top cover.
The external surface of the valve housing must be protected against corrosion
with a suitable top coating after installation involving welding and
consequent assembly.
Protection of the ID plate when painting the valve is recommended.
Maintenance
Service
The ICS 100-150 valves are easy to dismantle and can be serviced by using
spare parts available from Danfoss.
Do not open the valve while the valve is still under pressure.
Pressure relief can be done by carefully opening the manual operating spindle.
Because of small grooves along the thread on the spindle, refrigerant can be
released into open air when operating the manual opener. This operation must
only be done after providing the correct countermeasures under local
legislation.
The function module can be lifted out using a bolt size M10 screwed into the
threaded hole of the piston on the function module (fig. 3). Debris blocking
the bolt hole will need to be removed.
The ICS 100-150 insert can be serviced by dismantling the insert. This is done
by screwing off the washer plate fig 7 and removing the parts (fig 8). When
reassembling the valve, Danfoss recommends to use Loctite 586 or similar on
the thread of the washer plate.
Upon opening and removal of the function module:
- Check that the o-rings on the function module has not been damaged. A valve with a damaged o-ring might not modulate according to the specification.
- Check that the piston and cylinder is free of scratches and look for wear marks. If the wear is excessive the function module should be serviced or replaced to prevent false pilot signal.
- Check that the movement of the cylinder and valve seat is free and with low friction.
- If the teflon valve plate has been damaged the teflon valve plate should be replaced by using a Danfoss sparepart kit.
Assembly
Remove any dirt from the body before the valve is assembled. Check that all
channels in the valve are not blocked by particles or similar.
If possible, apply some refrigeration oil to ease the insertion and to protect
the o-rings.
Tightening
See Tightening in Installation section.
Use only original Danfoss parts, including O-rings and gaskets for
replacement. Materials of new parts are certified for the relevant
refrigerant.
In cases of doubt, please contact Danfoss.
Drawings are only for illustration, not for dimensioning or construction.
Danfoss accepts no responsibility for errors and omissions. Danfoss Industrial
Refrigeration reserves the right to make changes to products and
specifications without prior notice.
The following text is applicable to the UL listed products ICS 100-150
Applicable to all common non-flammable refrigerants, including/excluding (+)
R717 and to non-corrosive gases/liquids dependent on sealing material
compatibility (++). The design pressure shall not be less than the value
outlined in Sec. 9.2 of ANSI/ASHRAE 15 for the refrigerant used in the system.
(+++).
Danfoss A/S
Climate Solutions
danfoss.com
+45 7488 2222
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2022.06
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