Top Plate And Disc Valve Replacement - Pentair Autotrol 255 Installer Manual

Installer Manual 255/LOGIX 742-762-764 - Maintenance

9.4.10. Top plate and disc valve replacement

No.
Caution
Take care with sharp edges. Use of protective glove is highly recommended to remove the
spring (3).
Using a flat screwdriver, release the flapper springs (2) one by one and then remove the
A
spring (3).
B Loosen all top plate screws (1).
C Remove the top plate (4) from the valve.
D Clean or replace the flappers (5) if needed.
Note
The outline of the flapper seat can be seen on the flapper side. If the outline is irregular,
this may indicate that debris is or has been preventing the flapper (5) from closing, and
potential damage.
Note
When refitting the top plate (4), always follow the screwing order below.
76 / 92
Operation
Ref. MKT-IM-021 / A - 20.02.2019