Niro Soavi S.p.A
4C042E0C.DOC 4.4.9
4.4.2.2 ASSEMBLING
For assembly refer to figure 4.4.4, which shows how to assemble the elements
which make up the plunger packing:
• prepare the rings (H) which are supplied ready cut and preformed
• insert the rings in the flange which contains the packing (F) as specified
below
• insert the plastic ring (R) to the bottom of the flange
• insert, one at a time, the rings (H) which make up the seal packing, taking
care to stagger the joints regularly (for exambple by 120°). If the packing is a
standard type with multiple V rings or a single plastic piece, insert it all in one
go.
• Insert the plunger to give the rings the required shape
• Insert the double conic washer (M) as shown in the picture, making sure that
the direction of assembly is the one shown in the cross section
• Insert the packing washer (L); in some cases this washer can be made up
by two separate washers (L1, L2) made with both plastic and metal material.
• Lay the retaining flange (E) against the rear part of the flange which contains
the packing (F)
FIGURE 4.4.4
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