Omega
19
Commissioning
Flood the pump and the seal chamber with the medium to be
handled and vent carefully. The seal is operational now.
On
single--acting
mechanical seals, the
pressure in the seal
chamber
of the pump (stuffing box) must always
exceed am-
bient pressure
, to prevent any
air intake
at the seal faces,
which would result in dry running and thus
failure of the me-
chanical seal
.
In
all operating conditions
, the product to be sealed off must
be available
in liquid state
at the mechanical seal, particularly
during pump start--up and shutdown. This must be ensured by
appropriate facilities on the pump (e.g. heating).
Should the mechanical seal
fail
, the liquid to be sealed off may
spurt out
. Take suitable precautions to prevent hazards to per-
sons and the environment, e.g. install splash guards, wear sa-
fety goggles, etc.
Proper disposal
of leakage shall be arran-
ged for and supervised
by the operator
.
Maintenance
Mechanical seals
operated in compliance with the manual
are
maintenance--free
in their entire service life.
The mechanical seal should be inspected in accordance with
the plant inspection schedule.
During planned plant outage periods the spring--loaded rings
and the seat rings should be checked for visible damage in in-
stalled condition.
If the mechanical seal is inspected during plant outage, the con-
tact faces should be re--worked.
Faults
Determine and document the nature of the fault.
In the event of a fault as evidenced by excessive leakage, ob-
serve the tendency of the leakage amount. Changes in opera-
ting conditions must be documented. If an excessive tempera-
ture rise is detected, the mechanical seal must be shut down for
safety reasons.
During the warranty period the mechanical seal shall only be re-
moved and dismantled with the manufacturer’s approval or un-
der instructions of the mechanical seal manufacturer’s service
engineers.
If the fault cannot be remedied by the operator or if the cause
is unclear, please contact the KSB service center.
Dismantling
For dismantling of the mechanical seal assembly please refer
to section 7.3 ”Dismantling”. Grub screws (7) and joint rings
(2+9) shall be replaced whenever the mechanical seal has
been dismantled!
Repair
If the seal needs to be
repaired
, always
return the complete
seal
to the manufacturer. The manufacturer will know best
which parts can be re--worked and which parts have to be repla-
ced to ensure an optimum sealing effect.
If repair on the spot is necessary, it should be carried out in a
clean workshop preferrably by KSB--monteurs or skilled opera-
tor staff. Spring--loaded rings, seat rings, all elastomer materi-
als and springs should be replaced in any case.
Make sure to
comply with the instructions for handling ha-
zardous substances and the applicable accident preven-
tion regulations
when repairing, dismantling and cleaning
used mechanical seals. If you have any queries in this context
please inform yourself before commencing
any repair work.
Spare parts
Only
original spare parts
shall be used.
Non--compliance
with this requirement entails the risk of
seal malfunctions
which may jeopardize the safety of personnel and the environ-
ment.
It will also lead to
forfeiture of all warranty claims
.
