Series 620
MAINTENANCE
1003735EB.DOCX
Edition 2020-01-08
17/26
6.2.1
Replacement of plate and bonnet seals and valve cleaning
6.2.1.1
Required tools
•
Allen Wrench No. 6 (Allen torque wrench No. 6)
•
Clean room wiper
•
Isopropyl alcohol
•
O-ring removal tool (see chapter Accessories)
Description
Required tool
1. Obey the safety advice!
2. Open the valve
3. Switch OFF PFO
4. Switch OFF power to the valve
5. Disconnect valve cable
6. Loosen 4 screws
Allen wrench
No. 6
7. Remove actuator unit with bellows
from valve body
8. Remove plate O-ring (1) and bonnet
O-ring (2)
O-ring removal
tool
