5 Maintenance
Study the instructons carefully.
The items refer to the parts list and service kits section.
Lubricate the rubber seals and the lip seal beforefitting them.
5.3
Valve assembly
Step 1
1. Assemble the complete valve plug
2. Fix screw (19h, 20h) by using loctite or something similar
Shut-off valve
Change-over valve
TD425-059_1
TD425-073_1
Step 2
Fit lip seal (14)
(For sizes DN125-150: Fit guide ring (27) and lip seal (14))
Shut-off valve
Change-over valve
TD425-223_1
TD425-224_1
Step 3
Change-over valve:
1. Assemble upper valve body (16) and the actuator
2. Fit and tighten upper clamp (15)
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