ARI Armaturen STEVI 463 EN - Manual (Page 10)

Page 10 Rev. 0040318000 0410
Operating and installation instructions
3-way control valves - STEVI
®
423 / 463
7.1.2.2 Bellows seal and diverting plug
- Remove the cotter pin (pos. 33).
- Unscrew castle nuts (pos. 32).
- Detach V-port plug (pos. 31).
- Loose nuts (pos. 7 top).
- Detach bellows assembly (pos. 25) incl.
stuffing box housing (pos. 12).
- Loose nuts (pos. 25.8).
- Detach stuffing box housing (pos. 25.13)
resp. mounting bonnet (pos. 25.2).
- Extract stem/bellows unit (pos. 25.3) from
the bellows housing (pos. 25.1).
- Bolt new parts together and drill them.
- Replace 2 gaskets (pos. 25.6) and 2
gaskets (pos. 5).
- Assemble in the reverse order .
- Secure with nuts (pos. 7, 25.8 and 29) and
tighten them crosswise.
(For tightening torques refer to point 7.3.1.)
- Tighten screw joint (pos. 25.17)
respectively sleeve nut (pos. 25.16)
gradually up to tightness of the stuffing box
packing (pos. 25.10).
ATTENTION !
- Ensure that the torsion lock is
correctly positioned when
inserting new stem/bellows unit.
Introduce the grooved pin (pos.
25.9) into the torsion lock groove.
Make sure it runs smoothly!
Fig. 11: Series 463 with diverting plug
(top)
(bottom)