Danfoss ICSH 25-80 Data sheet
Data Sheet
Pilot operated servo valve
Type ICSH 25-80
2 step opening of hot gas lines for defrosting
ICSH dual position solenoid valve belongs to
the ICV family and consists of an ICV housing,
an ICS insert together with an ICSH top cover
with 2 EVM normally closed solenoid pilots
installed in the top cover.
ICSH is used in hot gas lines for the opening of
hot gas defrost ow to the evaporator in 2
steps. Both steps are activated by a controller or
a PLC energizing the magnetic coils in a time
delay sequence.
Step 1 (approx. 20% of full ow) is to allow a
smooth pressure build-up in the evaporator,
while the subsequent step 2 opens the ow to
100% to get the full defrost capacity.
The ICSH is designed for large industrial
refrigeration systems with ammonia,
uorinated refrigerants or CO2.
The ICSH features 2 conguration options,
which is established at site.
First option is dependent conguration, which
secures that step 2 can never open unless step
1 has been mechanically activated.
Second option is independent conguration
that allows step 2 to open disregarding step 1.
By choosing the independent option attention
should be paid to the risk of liquid hammering
in case the step 1 for any reason is disregarded.
AI260929867804en-000501
Pilot operated servo valve, type ICSH 25-80
Features
• Designed for Industrial Refrigeration applications for a maximum working pressure of 52 bar / 754 psig.
• Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2).
• Direct welded connections.
• Connection types include butt weld, socket weld and solder connections.
• Low temperature steel body.
• Low weight and compact design.
• 2-wire connection for use with a timer relay or 4 wire connection for connecting to a controller or a PLC.
• The ICSH main valve top cover can be oriented in any direction without the function of pilot valves being aected.
• Stabilizes working conditions and eliminates pressure pulsations during opening of hot gas.
• Manual opening possible.
• PTFE seat provides excellent valve tightness.
• Service friendly design.
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Dependent configuration
Step II
Port SII
EVM NC
Step I
Port SI
EVM NC
Port P
Blanking plug
A+B
P1 P2
A + B
P
S2
S1
80
20
Independent configuration
Step I
Port SI
EVM NC
Step II
Port P
EVM NC
P1 P2
Port SII
Blanking plug
A+B
A + B
P
S2
S1
80
20
Spring
guided
needle
Piston
top
Manual opener spindle
Max torque:
15Nm
Flow
stops
Bleed
hole
Pilot operated servo valve, type ICSH 25-80
Function
Figure 1: Dependent conguration
Figure 2: Independent conguration
Figure 3: Supply ow
The ICSH is designed for a 2 step opening of the hot gas ow for the evaporator defrost. Step 1 (20% capacity) is
intended for a smooth pressure build up in the evaporator - step 2 will open for full capacity.
The valve is pilot controlled by 2 standard EVM Normally Closed valves and the 2 EVM’s are controlled by an external
controller like PLC.
The external controller simply needs to activate the 2 EVM coils in a sequence with a certain time oset.
The time oset depends on the specic conditions around the ICSH and must be determined at site.
The opening of the ICSH is done by a pressure dierence between the inlet pressure P1 and the outlet pressure P2,
and for the main valve to open fully, a Δp of 0.2 bar (2.9 psi) is needed.
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Figure 4: Supply ow
Pilot operated servo valve, type ICSH 25-80
The ICSH main valve can be congured into 2 dierent congurations: Dependent or Independent.
The Dependent setup (Figure 1: Dependent conguration) means that fully open (step 2) can only be performed if
step 1 is performed successfully. If step 1 for some reason fails, the valve will not open at all.
The matching control program should, in this case, be to activate step 1 coil followed by activation of step 2 coil.
Dependent setup is done by installing the 2 EVM’s in Port SI (step 1) and Port SII (step 2), and blanking o the P port
with Blanking plug A+B.
The Independent setup (Figure 2: Independent conguration) involves the option to force step 2 to open
independent of the result of step 1.
The matching control program should also in this case be to activate step 1 coil followed by activation of step 2 coil.
When step 2 is activated the full ow will immediately be started.
ATTENTION:
A risk of liquid hammering in the system may appear.
Independent setup is done by installing the 2 EVM’s in Port SI (step 1) and Port P (step 2), and blanking o the SII
port with Blanking plug A+B.
The internal channel structure allows in both congurations a direct ow to the step 1 EVM. By activating step 1 the
ow will continue through the spring guided needle that is resting on the top of the piston (see Figure 3: Supply
ow).
The ow will build up a pressure on top of the piston, which will start moving down i.e. start open the main valve.
The spring guided needle follows the pistons movement downwards and after a predened distance the needle
reaches its stop position, where the needle closes the supply ow (see Figure 4: Supply ow).
The bleed hole in the piston top will allow a certain ow out of the pressurized chamber thus enable the piston to
move upwards, but any movement of the piston is now being controlled by the needle that compensates by
opening the supply ow.
The needle will balance the supply/bleed ows and keep the piston at this position. Step I ow - equivalent to
approx. 20% of capacity - has now been established.
After a predetermined period of time the step II coil is activated.
In dependent set-up further ow can only reach the step II EVM if step I EVM is open (working properly). In
independent set-up further ow can reach the step II EVM regardless the status of step I.
Once ow is passing through step II EVM it continues to the top of the piston and moves the piston to full open
position.
For both congurations the valve will close and stay closed when both coils are de-energised.
The closing is achieved by drainage through the bleed hole.
ICSH is including a manual opener like all the valves in the ICV family. The operation of the opener is done by
turning the spindle clockwise (opening the valve) or counterclockwise (closing the valve).
ATTENTION:
Attention should be paid to the maximum torque applied to the spindle when turning: Never exceed 15 Nm to the
spindle in any direction.
Controller and Wiring
The 2 steps need to be activated from a PLC in a time delay sequence. The time delay itself must be determined on
site since local conditions are decisive.
The wiring from the controller to the 2 coils can be done by either one or two cables.
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Coil step
2
K1
K1
2 wire connection
Coil step 2
Coil step 1
1 wire connection with Timer relay
Coil step 1
Pilot operated servo valve, type ICSH 25-80
By one cable layout only one signal is needed though an additional timer relay has to be connected according to
the gure to the right.
Two cable layout requires two subsequent output signals from the PLC.
Figure 5: Wire connection
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Pilot operated servo valve, type ICSH 25-80
Media
Refrigerants
Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2).
New refrigerants
Danfoss products are continually evaluated for use with new refrigerants depending on market requirements.
When a refrigerant is approved for use by Danfoss, it is added to the relevant portfolio, and the R number of the
refrigerant (e.g. R513A) will be added to the technical data of the code number. Therefore, products for specic
refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.
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ICV 25 ICV 32 ICV 40 ICV 50 ICV 65
D A SOC SD SA
Butt-weld DIN Butt-weld ANSI Socket weld ANSI Solder DIN Solder ANSI
ICSH 25-25
ICSH 32
ICSH 40
ICSH 50
ICSH 65
ICSH 80
k
v
(m3/h) (full capacity)
11.517274470
85
C
v
(USgal/min) (full capacity)
13.320315181
98
Pilot operated servo valve, type ICSH 25-80
Product specication
The ICSH Concept
The ICSH concept is developed to highest exibility of direct welded connections. For valve sizes ICV 25 – ICV 65 a
wide range of connection sizes and types is available.
The direct welded (non-anged) connections secure low risk of leakage.
There are ve valve bodies available (ICSH 80 makes use of ICV 65 housing).
Figure 6: Valve bodies
Design (valve)
The ICSH valves are approved in accordance with the European standard specied in the Pressure Equipment
Directive and are CE marked.
For further details / restrictions - see Installation Instruction.
Valve body and top cover material Low temperature steel
Technical data
Temperature range
Media: -60 °C / +120 °C (-76 °F / +248 °F).
Pressure
The valve is designed for a max. working pressure of 52 bar / 754 psig
Step 1 20% capacity of step 2 (full capacity)
Surface protection
The ICSH external surface is zinc-chromated to provide good corrosion protection.
Min. opening pressure dierential
0.2 bar (2.9 psi) higher inlet pressure than otlet pressure for fully open.
Coil requirements: Both coils to be IP67.
Table 1: ICSH capacity values
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T
ØD
Danfoss
A148B15.10
SizemmSize
in.ØDmmTmmØDin.Tin.
20
(¾)
26.9
2.3
1.059
0.09125(1)
33.7
2.6
1.327
0.10332(1¼)
42.4
2.6
1.669
0.10240(1½)
48.3
2.6
1.902
0.10350(2)
60.3
2.9
2.37
0.1165(2½)
76.1
2.930.1180(3)
88.9
3.2
3.50
0.13
T
ØD
SizemmSize
in.ØDmmTmmØDin.Tin.
Schedule
(20)¾26.9
4.0
1.059
0.15880(25)133.7
4.6
1.327
0.18180(32)1¼42.4
4.9
1.669
0.19380(40)1½48.3
5.1
1.902
0.20180(50)260.3
3.9
2.37
0.1540(65)2½73.0
5.2
2.87
0.2040(80)388.9
5.5
3.50
0.22
40
Pilot operated servo valve, type ICSH 25-80
Connections
There is a wide range of connection types available with ICSH valves:
• D: Butt weld, EN 10220
• A: Butt weld, ANSI (B 36.10)
• SOC: Socket weld, ANSI (B 16.11)
• SD: Solder connection, EN 1254-1
• SA: Solder connection, ANSI (B 16.22)
Figure 7: D: Butt-weld
Table 2: Butt-weld (EN 10220)
Figure 8: A: Butt-weld
ANSI
Table 3: Butt-weld ANSI (B 36.10)
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SizemmSize
in.IDmmTmmIDin.Tin.LmmLin.
(20)¾27.2
4.6
1.071
0.181130.51
(25)133.9
7.2
1.335
0.284130.51
(32)1¼42.7
6.1
1.743
0.240130.51
(40)1½48.8
6.6
1.921
0.260130.51
(50)261.2
6.2
2.41
0.24160.63
(65)2½74
8.8
2.91
0.344160.63
L
ID
SizemmIDmmL
mm
22
22.08
16.52828.082635
35.072542
42.072854
54.093376
76.1
33
L
ID
Size
in.IDin.Lin.
⅞
0.875
0.650
1⅛1.125
1.024
1⅜1.375
0.984
Pilot operated servo valve, type ICSH 25-80
Figure 9: SOC: Socket
welding ANSI
Table 4: Socket welding ANSI (B 16.11)
Figure 10: SD: Soldering
Table 5: SD: Soldering (EN 1254-1)
Figure 11: SA: Soldering
Table 6: SA: Soldering (ANSI B 16.22)
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