Nederman FlexFilter EX Instruction Manual page 51

16.1 Service and Maintenance of ATEX equipment
To ensure the required level of protection with regards to the equipment
category, check the following points:
• Ensure that the FlexFilter EX is regularly inspected for damage or
malfunction. If the FlexFilter EX is damaged, it must be shut down and
possible explosive atmosphere removed.
• Ensure that no explosive atmosphere and/or dust layers are present
when cleaning, servicing or inspecting the FlexFilter EX
• Ensure that only Nederman original spare parts are used.
• Ensure that the FlexFilter EX is not covered with thick dust layers (> 5
mm). This is prevented by setting up routines for regular cleaning and
including these in the explosion protection document.
16.2 Separating the modules
The picture no. 24 / A-C show how the rubber sealing rings, the steel retainer
rings and the earth connections should be assembled. When a used sealing
ring is refitted, it no longer has the flat shape as shown in picture no. 24 / A.
The rubber ring has a curved shape. Use e.g. a screwdriver to fit the edge of
the module between the rubber lips. The steel ring has been fitted, as shown
in picture no. 24 / C.
If the collector has been dismantled, ensure that the rubber sealing rings
and the steel retainer rings, keeping the modules together, are correctly
reassembled and that the earth connection is correct (see picture no. 25).
16.3 Maintenance schedule
Type of Maintenance
General
Main filter change
Control filter
TVFD valve operation
TVFD stop funct
Explosion relief panel
Frequency
Once a year
6000 h
6000 h
Weekly
Yearly
3 months
FlexFilter EX EN
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