Servicing
Diaphragm pump N87.9 EX
26
Translation of Original Operation and Installation Instruction, english, KNF 323252 04/21
The ball bearings installed in the pump and in the drive motor are lubri-
cated for life. This means that the bearings are coated with a high-quality
grease with a high degree of purity and an ideal fill level by the bearing
manufacturer at the plant. These bearings cannot be relubricated. The pre-
scribed bearing replacement periods can be found in Chapter
The duration of use of the bearing grease depends on many highly individ-
ual factors. The prescribed bearing replacement periods were specified
under the assumption of normal ambient conditions. Factors that can make
early bearing replacement necessary include dust or dirt that may get into
the bearing, aggressive gases or vapors that may change the lubricating
properties of the bearing grease, etc. It is the operator's responsibility to
assess these factors.
9.2 Cleaning
9.2.1 Flushing the pump
WARNING
Risk of explosion by flushing the pump with air
à
In potentially explosive areas or when using
the pump with explosive media, only permit
specialist to flush the pump with inert gas.
WARNING
Risk of burns from hot pump parts and/or hot
medium
Some pump parts may be hot during or after oper-
ation of the pump.
à
Allow the pump to cool after operation.
à
Take protective measures to protect against
touching hot parts.
à
Before switching off the pump under atmospheric conditions, flush for
several minutes with inert gas.
If there is no risk of explosion, flushing can also be performed with
air.
à
Discharge the media safely.
9.2.2 Cleaning the pump
WARNING
Risk of explosion from electrostatic charging of the
components
à
Only clean the pump with a damp cloth.
à
Only clean the pump with a damp cloth and non-flammable cleaning
agents.
à
Only use solvents during cleaning if head materials are not corroded
(ensure resistance of the material).
