MAINTENANCE  Series 
 
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Edition 2019-05-03  963283EA
 
7.2.1  Replacement of isolation seals and valve cleaning 
7.2.1.1  Required tools 
 
• 
Allen Wrench 5mm 
• 
Open end wrench 13mm 
• 
Service cable USB Type A to B 
(PC to valve Service connector) 
• 
Vacuum grease (see chapter spare parts) 
• 
O-ring removal tool 
(see chapter Accessories) 
 
• 
Clean room wiper 
• 
Isopropyl alcohol 
 
 
Description 
Required tool 
Electrical power and compressed air is required to perform steps 1 to 11 during 
disassembly respectively 11 to 1 during assembly. 
1.  Set the valve to local mode  
 
2.  Activate “Maintenance” (reduced speed)
 
Now us the position buttons to move the    
valve plate. The valve will now move in a 
very low speed 
 
Alternatively, the remote interface can be 
used: 
 
Set “Control Mode” to ‘Maintenance’ 
 
Now use “Target Position” to move the 
valve 
 
 
 
 
 
 
 
Service cable
(PC to valve 
Service 
connector) 
3.  Vent both valve chambers.  
 
4.  Open the 4 bonnet screws and remove 
valve bonnet. 
 
 
 
Allen wrench 
5mm