KSB 4EYS, Installation & Operating Manual

Page: 16 / 28

6 Operation
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4EYS / 4EYT
1974.91/01-EN
6 Operation
6.1 Safety instructions for operation
CAUTION
Air intake via the seal faces
Dry running of the seal and consequential seal failure!
▷
For single seals the pressure in the seal chamber of the pump must always be
higher than the ambient pressure.
CAUTION
Unsuitable fluid to be sealed off
Damage to the machinery!
▷ Take appropriate measures to ensure that the fluid to be sealed off at the
mechanical seal is in liquid condition no matter what the operating status of
the pump. This applies in particular when starting up and stopping the pump.
▷ If the fluid to be sealed off forms deposits while the pump set cools down or
during standstill of the pump set, the seal chamber must be flushed through
with a clean liquid. The quantity and type of flushing liquid has to be defined
by the operator for the specific material combination of the mechanical seal.
CAUTION
Excessive rise in temperature
Damage to the mechanical seal!
Dry running or damage to the elastomers, incrustations at the seal faces, etc.
▷ Shut down the pump as described in the operating manual.
NOTE
If the operating limits indicated are observed and the instructions given in this
manual are complied with, the mechanical seal can be expected to give trouble-free
operation. If the values during operation are not within the specified limits, the
mechanical seal must be removed from the system and sent to KSB for inspection.
6.2 Emissions
WARNING
Incorrect handling of the fluid to be sealed off
Risk of injury!
▷ If the fluid to be sealed off and/or the buffer fluid have to meet the
requirements of the German Hazardous Substances Regulations, the regulations
on handling hazardous substances (safety data sheets to Directive 91/155/EEC)
and the accident prevention regulations must be heeded.
NOTE
If a reduction in leakage cannot be observed or if other failures occur, the
mechanical seal must be shut down, removed from the system and sent to KSB for
inspection.