SPX APV DELTA MS4, Operating Manual, Page: 21 / 51

16
Diaphragm valve with fan support
DELTA MS4
Operating Manual rev. 0
DELTA MS4-UK0.qxp / 05.2008
UK
11. Service Instructions
Attention: By means of the assembly tool the seat seal
of single seat valves can be installed, only.
The assembly tool consists of:
- nut
-
thrust ring
- ring with venting plug
- housing
- threaded bolt.
11.1. Installation of the seat seal in the valve shaft
1. Insert the valve shaft into the housing in such a manner that
the seal groove is in the valve housing.
2. Clamp the shaft in the housing by the threaded bolt.
Clamp the housing in a vice.
3. Slightly grease the seat seal with APV food-grade grease.
Then pull the seal onto the ring until stop by means of the
venting plug.
4. Introduce the ring with the seat seal into the housing and
press it down until it stops.
5. Insert the thrust ring into the housing. Screw on the nut and
tighten it until stop by means of a hook spanner.
6. Release the nut. Pull the ring and thrust ring out of the housing.
7. Take the housing out of the vice, unscrew the threaded bolts.
Take the valve shaft out of the housing.
Check the correct fit of the seat seal.
nut
thrust ring
ring
seat seal
valve shaft
housing
threaded bolt