SPX FLOW APV DELTA SD4 Series Instruction Manual page 30

APV
APV_SD4_ATEX_UK-0_122018.indd
15.2. Manual installation of seat seal (pos. 12)
1. Before assembly, the seat seal must be provided with a thin layer of grease.
The receiving groove for the seat seal must not be greased.
2. Clamp the valve shaft in a vice.
The valve shaft must not be damaged.
Use protective braces.
3. Press the slightly greased seal at four spots with the wide side to the front into the receiving groove
(see sketch 1).
4. Use the assembly tool (or screwdriver with rounded edges) to press the seal at four opposite spots
1-2, 3-4 into the groove (see sketch 1).
5.
Press the seal step by step into the groove. Work alternately at opposite spots. See to an even fit
of the seat seal.
6.
At the end, place the assembly tool between the seal shoulder and the groove wall. Work all around
the circumferences of the groove. The groove bottom is vented and the seal shoulders are locked in
place by this process (see sketch 2).
seal shoulder
1
2
4
25
15. Installation of Seat seal
Sketch 1
seal profile
3
UK
Sketch 2
Double seal valve
DELTA SD4-ATEX
Instruction Manual: UK - rev. 0