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 flow 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 flow) is to allow a smooth pressure build-up in the evaporator, while the subsequent step 2 opens the flow to 100% to get the full defrost capacity.
The ICSH is designed for large industrial refrigeration systems with ammonia, fluorinated refrigerants or CO2.
The ICSH features 2 configuration options, which is established at site.
First option is dependent configuration, which secures that step 2 can never open unless step 1 has been mechanically activated.
Second option is independent configuration 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 aƒected.
•Stabilizes working conditions and eliminates pressure pulsations during opening of hot gas.
•Manual opening possible.
•PTFE seat provides excellent valve tightness.
•Service friendly design.
© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 2 |
Pilot operated servo valve, type ICSH 25-80
Function
Figure 1: Dependent configuration |
Figure 2: Independent configuration |
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Step II |
Step I |
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Step I |
Step II |
Port SII |
Port SI |
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Port SI |
Port P |
EVM NC |
EVM NC |
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EVM NC |
EVM NC |
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Port P |
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Port SII |
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Blanking plug |
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Blanking plug |
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A+B |
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A+B |
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P1 |
P2 |
P1 |
P2 |
A + B |
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P |
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80 |
P |
A + B |
80 |
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S2 |
20 |
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S2 |
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S1 |
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20 |
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Dependent configuration |
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Independent configuration |
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Figure 3: Supply flow |
Figure 4: Supply flow |
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Manual opener spindle
Max torque:
15Nm Flow stops
Spring guided
needle
Bleed
Piston hole top
The ICSH is designed for a 2 step opening of the hot gas flow 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 oƒset.
The time oƒset depends on the specific conditions around the ICSH and must be determined at site.
The opening of the ICSH is done by a pressure diƒerence 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.
© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 3 |
Pilot operated servo valve, type ICSH 25-80
The ICSH main valve can be configured into 2 diƒerent configurations: Dependent or Independent.
The Dependent setup (Figure 1: Dependent configuration) 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 oƒ the P port with Blanking plug A+B.
The Independent setup (Figure 2: Independent configuration) 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 flow 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 oƒ the SII port with Blanking plug A+B.
The internal channel structure allows in both configurations a direct flow to the step 1 EVM. By activating step 1 the flow will continue through the spring guided needle that is resting on the top of the piston (see Figure 3: Supply flow).
The flow 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 predefined distance the needle reaches its stop position, where the needle closes the supply flow (see Figure 4: Supply flow).
The bleed hole in the piston top will allow a certain flow 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 flow.
The needle will balance the supply/bleed flows and keep the piston at this position. Step I flow - 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 flow can only reach the step II EVM if step I EVM is open (working properly). In independent set-up further flow can reach the step II EVM regardless the status of step I.
Once flow is passing through step II EVM it continues to the top of the piston and moves the piston to full open position.
For both configurations 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.
© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 4 |
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 figure to the right.
Two cable layout requires two subsequent output signals from the PLC.
Figure 5: Wire connection
2 wire connection
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Coil step 2 |
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Coil step 1 |
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1 wire connection with Timer relay
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K1 |
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Coil step 1 |
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Coil step 2 |
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K1 |
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© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 5 |
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 specific refrigerants are best checked at store.danfoss.com/en/, or by contacting your local Danfoss representative.
© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 6 |
Pilot operated servo valve, type ICSH 25-80
Product specification
The ICSH Concept
The ICSH concept is developed to highest flexibility 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-flanged) connections secure low risk of leakage.
There are five valve bodies available (ICSH 80 makes use of ICV 65 housing).
Figure 6: Valve bodies
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ICV 25 |
ICV 32 |
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ICV 40 |
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ICV 50 |
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ICV 65 |
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D |
A |
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SOC |
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SD |
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SA |
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Butt-weld DIN |
Butt-weld ANSI |
Socket weld ANSI |
Solder DIN |
Solder ANSI |
Design (valve)
The ICSH valves are approved in accordance with the European standard specified 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 di€erential
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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ICSH 25-25 |
ICSH 32 |
ICSH 40 |
ICSH 50 |
ICSH 65 |
ICSH 80 |
k |
v |
(m3/h) (full capacity) |
11.5 |
17 |
27 |
44 |
70 |
85 |
Cv (USgal/min) (full capacity) |
13.3 |
20 |
31 |
51 |
81 |
98 |
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© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 7 |
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
| <![if ! IE]> <![endif]>Danfoss A148B15.10 |
| <![if ! IE]> <![endif]>T |
| <![if ! IE]> <![endif]>ØD |
Table 2: Butt-weld (EN 10220)
Size |
Size |
ØD |
T |
ØD |
T |
mm |
in. |
mm |
mm |
in. |
in. |
20 |
(¾) |
26.9 |
2.3 |
1.059 |
0.091 |
25 |
(1) |
33.7 |
2.6 |
1.327 |
0.103 |
32 |
(1¼) |
42.4 |
2.6 |
1.669 |
0.102 |
40 |
(1½) |
48.3 |
2.6 |
1.902 |
0.103 |
50 |
(2) |
60.3 |
2.9 |
2.37 |
0.11 |
65 |
(2½) |
76.1 |
2.9 |
3 |
0.11 |
80 |
(3) |
88.9 |
3.2 |
3.50 |
0.13 |
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Figure 8: A: Butt-weld
ANSI
| <![if ! IE]> <![endif]>ØD |
<![if ! IE]> <![endif]>T |
Table 3: Butt-weld ANSI (B 36.10)
Size |
Size |
ØD |
T |
ØD |
T |
Schedule |
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mm |
in. |
mm |
mm |
in. |
in. |
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(20) |
¾ |
26.9 |
4.0 |
1.059 |
0.158 |
80 |
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(25) |
1 |
33.7 |
4.6 |
1.327 |
0.181 |
80 |
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(32) |
1¼ |
42.4 |
4.9 |
1.669 |
0.193 |
80 |
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(40) |
1½ |
48.3 |
5.1 |
1.902 |
0.201 |
80 |
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(50) |
2 |
60.3 |
3.9 |
2.37 |
0.15 |
40 |
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(65) |
2½ |
73.0 |
5.2 |
2.87 |
0.20 |
40 |
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(80) |
3 |
88.9 |
5.5 |
3.50 |
0.22 |
40 |
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© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 8 |
Pilot operated servo valve, type ICSH 25-80
Figure 9: SOC: Socket welding ANSI
Table 4: Socket welding ANSI (B 16.11)
Size |
Size |
ID |
T |
ID |
T |
L |
L |
mm |
in. |
mm |
mm |
in. |
in. |
mm |
in. |
(20) |
¾ |
27.2 |
4.6 |
1.071 |
0.181 |
13 |
0.51 |
(25) |
1 |
33.9 |
7.2 |
1.335 |
0.284 |
13 |
0.51 |
(32) |
1¼ |
42.7 |
6.1 |
1.743 |
0.240 |
13 |
0.51 |
(40) |
1½ |
48.8 |
6.6 |
1.921 |
0.260 |
13 |
0.51 |
(50) |
2 |
61.2 |
6.2 |
2.41 |
0.24 |
16 |
0.63 |
(65) |
2½ |
74 |
8.8 |
2.91 |
0.344 |
16 |
0.63 |
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Figure 10: SD: Soldering
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| <![if ! IE]> <![endif]>ID |
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L |
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Table 5: SD: Soldering (EN 1254-1) |
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Size |
ID |
L |
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mm |
mm |
mm |
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22 |
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22.08 |
16.5 |
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28 |
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28.08 |
26 |
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35 |
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35.07 |
25 |
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42 |
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42.07 |
28 |
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54 |
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54.09 |
33 |
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76 |
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76.1 |
33 |
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Figure 11: SA: Soldering |
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| <![if ! IE]> <![endif]>ID |
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L |
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Table 6: SA: Soldering (ANSI B 16.22) |
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Size |
ID |
L |
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in. |
in. |
in. |
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⅞ |
0.875 |
0.650 |
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1⅛ |
1.125 |
1.024 |
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1⅜ |
1.375 |
0.984 |
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© Danfoss | Climate Solutions | 2021.02 |
AI260929867804en-000501 | 9 |
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