SPX APV DELTA SDU4, Operating Manual, Page: 21 / 39

16
11. Assembly tool for seat seal
The assembly tool consists of:
- nut
- thrust
piece
- ring with venting plug
- housing
- threaded bolt
Installation of the seat seal (item 15.1) in the upper valve shaft
1. Insert 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.
Fix the housing in a vise.
3. Lightly grease the seat seal with APV food-grade grease.
Pull the seal onto the ring with venting plug until it stops.
4. Insert 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 by a hook spanner until it stops.
6. Release the nut. Pull the ring and the thrust piece out of the
housing.
7. Take the housing out of the vise. Open the threaded bolt and pull
the shaft out of the housing.
Check the correct fit of the seat seal.
Double Seal Change-Over Valves
Delta SDU 4
Operating Manual Rev. 1
nut
thrust piece
ring
seat seal
valve shaft
housing
threaded bolt
UK