Vogelsang VX Series, Manual

Page: 154 / 202

Service Manual
Service Manual
Pump Models:
VX Series Q Pumps
Before continuing with
cartridge seal replacement:
Important!
Once you’ve
removed the lobes, you must
evaluate the condition of the
lobe core that will contact the
Block Ring.
Lobe condition is
critical to prevent premature
seal failure. ( Fig. 24 & 25 )
Lobes provided before the
development of the Block Ring
seal may have partial coating on
the inner core which mates with
the seal. These lobes may show
small bits or pieces of the
coating in a jagged appearance
around the surface which is not
acceptable when using Block
Ring seals.
New lobes have a smooth,
clean, machined appearance
and show no jagged bits of
coating. If lobes are being
reused with the Block Ring seal,
attention must be given to the
condition of the lobe core,
assuring that it has not been
damaged.
Unacceptable: Jagged
pieces of coating on inner
core can lead to seal failure
(
Fig.26 ).
Surface is free
of gouges or
elastomer
fragments.
Surface has
even elastomer
coating with no
gouges.
Fig. 24
Fig. 25
Fig. 26