Maintenance Schedule; General Inspection; Main Filter Change; Control Filter Change - Nederman FlexFilter EX Manual De Instrucciones

EN

Maintenance schedule

Type of Maintenance
General

Main filter change

Control filter
Explosion relief panel

General inspection

• Inspect the integrity of the dust separator, in par-
ticular the steel clamping rings holding together
the housing/inlet/cone-modules .
• Check the integrity of the frame and all attach-
ments . Tighten bolts if necessary .
• Make sure the inside of the FlexFilter and the
connection pipes are free from deposits . Build up
of deposits inside the piping system may cause
discharge of static electricity .
• On Twin models, check the inlet pipe for wear. Re-
place the inlet pipe if the inner coating is worn out .
• Make sure the outside of the FlexFilter EX, and
particularly the solenoids, sensors and connection
box, are free from dust layers.
• Clean the area around the FlexFilter EX and all
areas where the collected material is stored to
ensure that there are no dust deposits .
• Ensure that no combustible material is placed in
the risk area .
• Check that all signs/markings regarding safe
operation are in place and that the personnel know
about them .
Main filter change
The filter bags should normally be replaced after 6000
hours of operation or when damaged. The filter bags
should also be replaced if the filter function is insuf-
ficient. The AB Ph. Nederman & Co HV Control Panel
is fitted with a service hour meter for recording service
hours. Replacement of filters should be registered in
the Service protocol. Individual replacement of filter
bags is possible but replacing the whole filter package,
including filter panel and locking rings, is recommend-
ed as it is quicker and causes less spreading of dust .
32
FlexFilter EX
Frequency
Once a year
6000 h
6000 h
3 months
Procedure
WARNING! Risk for personnel injuries . The
vacuum and compressed air to the FlexFilter
EX must be turned off before commencing
filter change.
WARNING! Risk for personnel injuries . Use
proper protective equipment .
WARNING! Risk for personnel injuries . Use
proper lifting equipment .
NOTE! It is recommended that the control filter is
replaced when changing main filter.
1 . Disconnect all the attached piping and the clean-
ing valve .
2 . Access the filter by rotating the dust separator
(see chapter "Installation") .
3 . Separate the top module from the housing and
disconnect the filters earth connection cable from
the top module .
4 . Put the old filter package in a large plastic bag, or
wrap in plastic foil to avoid dust spreading .
5 . Fit the new filter package and refit the top module.
Remember to reconnect the earth cable .
6 . Check earth connection between filter and GND1
before reconnecting the pipes, hoses and cables.
7 . Check earth connection between the top and
GND1 and Control filter.
Changing individual filter socks
Individual filter socks that have been damaged can be
replaced . Use a screwdriver to detach the plastic lock-
ing ring (see picture no . 27 / A) .
The coiled spring can be reused with the new conduc-
tive filter sock, but the locking ring (see picture no. 27 /
B) must be replaced when securing the new sock .
NOTE! Never re-use an old locking ring!

Control filter change

The control filter should normally be replaced after
6000 hours of operation. The control filter must also be
replaced if damaged or if there is a high pressure drop
over the control filter.
Procedure
WARNING! Risk for personnel injuries . The
vacuum and compressed air to the FlexFilter
EX must be turned off before commencing
filter change.
WARNING! Risk for personnel injuries . Use
proper protective equipment .