Replacing The Seals - Georg Fischer DIASTAR SIX Manuel D'utilisation D'origine

8. Move the actuator in "open" position
9. Position actuator on the valve body and tighten housing nut handtight
8. Move the valve into the "closed" position with the control medium (FO, DA)
9. Put the valve in the "open" position again with the control medium – diaphragm is now
centered
10. Screw housing nut with strap wrench tight, till...
... a uniform all-around gap of 0.5 up to 1 mm between valve body and bonnet is
achieved and
... the half-round position indicator aligns with the friction lock
Tip
For valves with built-in stroke limiter, we recommend to read just the valve.
6.2 Replacing Seals
More information can be found in the Georg Fischer Planning Fundamentals via
www.piping.georgfischer.com or contact your Georg Fischer representative.
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