Niro Soavi S.p.A
4C042E0C.DOC 4.4.4
In the VHP high-pressure head the plunger gaskets are housed inside
removable flanges which can be accessed from the read of the head, inside the
water sump.
For complete disassembly instructions see paragraph 4.4.2.
4.4.1.2 ASSEMBLING
CAUTION: The ceramic plungers fixed by clamps do not have a specific
direction for assembly, and can be mounted from either end.
To assemble the plungers refer also to the specific instructions given in
paragraph 4.4.2 describing packing assembly.
Below we describe the procedure for fixing the plungers which complements the
operations described above.
Once the flange which contains the packing and the plunger has been fixed on
the studs and on the special centering dowels, it is possible to fix each plunger
to its guide plunger, using a clamp (item. B, figure 4.4.1) and correctly tightening
the retaining screws. (tightening torque 7÷8 N*m).
Take care not to bend the ceramic plungers as you risk breaking them.
CAUTION: We recommend you move the plungers to the outer dead
center (completely forward) by rotating the flywheel, while the guide
plungers must be taken back to the inner dead center (completely back),
in order to have more space for tightening the packing flanges.
CAUTION: Plungers must be mounted one by one, starting with the outer
and leaving the middle one(s) last for easier access.
Once all the nuts of the packing flanges have been tightened (see details in
paragraph 4.4.2) proceed as follows (figure 4.4.1):
• Insert the clamp (B) onto the end of the guide plunge extension (C) or on the
part of the plunger which protrudes from the packing flange
• Move the guide plunger extension completely forward, by rotating the
flywheel manually, until the plunger is right against the extension (C)
• Move the clamp into position, against the diameter enlargement of the
extension, then tighten the clamp with the screws (A), by applying a 7÷8 N*m
tightening torque.
• Repeat this procedure for every plunger, starting with the outer ones.
To Next Page
Loading...
