Diaphragm pump N87TTE Ex
Servicing
Translation of Original Operating- and Installation Instructions, english, KNF N87TTE Ex 01/13
18
8. Servicing
8.1. Servicing schedule
WARNING
Danger of explosion due to wear!
Î
Have pump bearings replaced by KNF according
to servicing schedule.
Î
Have motor bearings replaced according to
motor manufacturer's specifications.
Component
Servicing interval
Pump
Regular inspection for external damage
or leaks
Structured diaphragm
and valve plates/
sealings
Replace at the latest, when pump output
decreases
Pump bearings
(at drive shaft and
connecting rod)
Have them replaced after 17,000 operat-
ing hours or 24 months at the latest
Motor bearings
See motor operating- and installation
instructions or ask motor manufacturer
Tab. 11
8.2. Cleaning
8.2.1. Flushing pump
WARNING
Danger of explosion when flushing pump
with air!
Î
In hazardous areas, or in cases when the pump
is used with explosive media, only have pump
flushed with inert gas by specially trained per-
sonnel.
Î
KNF recommends: Flush the pump for several minutes with
inert gas under atmospheric conditions before switching it off.
If there is no danger of explosion, air can also be used for
flushing.
8.2.2. Cleaning pump
WARNING
Danger of explosion from electrostatic
charging of components!
Î
Only clean pump with a damp cloth.
Î
Only clean the pump with a damp cloth and non-flammable
cleaning agents.
Î
If compressed air is available, blow out the components.