Operation &
Maintenance Manual
Pump
RW
24/32
Edition 4
HSC
08-W36
782-001-GB
9.4
Cable protection
When chemical or mechanical protection for the
cable is needed a tube can be fitted around the
cable (Fig. 9.2 pos 1).
This is a flexible stainless steel tube (1) connected to a
special cable entry (Fig.9.2 pos 2).
When your pump is equipped with a cable protection, a
“3” is stamped on the dataplate at position 24. See
appendix 1.
9.5
Special oil
Upon request the oilhousing can be filled with
a special oil. If so, a label on the pump shows which
kind of oil is used.
9.6
Version with cooling system
The following cooling versions are possible:
*
internal cooling system, see par. 9.6.1
*
external cooling system
*
external cooling system with seal flushing
9.6.1 Internal cooling system
Mostly an internal cooling system is supplied.
The pumped medium is circulated from the backside of
the impeller, through the cooling jacket and back into
the pump, flushing the seal.
The whole system is self-venting.
For horizontally installed pumps, the cable entries are
underneath the motor, otherwise the cooling system will
not vent itself.
On top of the cooling jacket, an inspection plug is
provided.
Never open this plug when the pump is running!
If the pump often trips on the thermostats, this may be
caused by clogging of the cooling system.
By lifting the jacket, the system can easily be cleaned
with a waterjet.
If the pump must be disassembled for
repair, the position of the motorunit parts
should be marked.
This must be done to ensure that the position of the
cooling channels will not change by re-assembling.
Fig. 9.2
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