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Dust Extractor
RL 250/RL 300
Filter contents level monitoring/Explosion pressure proofness
Warning! The explosion pressure proofness is 210 mbar.
Warning! Danger of dust inhalation:
Always wear a dust respirator when cleaning the filter by hand (filter mask with a particle collector, Class 2).
Prevent people uninvolved with the process from being exposed to dust pollution. Avoid ignition sources,
open fire and electrostatic charging.
Dust and shavings must be disposed of according to the regulations of the country where the
machine is installed.
7 Filter contents level monitoring
If the filter resistance increases to a value which is not al-
lowed (filter clogging up), a warning lamp in the equip-
ment cabinet switches itself on. The filter component
cleaning process starts simultaneously. Once the device
is switched off, a manual cleaning process should start
(switch in the control cabinet). If, the warning lamp is
still on once the dust extractor is started anew, clean the
filter elements by hand using an appropriate industrial
vacuum.
!
Differential pressure transducer
Fig. 1: Monitoring the filter system
8 Explosion pressure proofness
The RL 250/RL 300 clean air devices were tested for ex-
plosion pressure proofness by the FSA GmbH test centre.
The maximum explosion excess pressure, up to which the
dust extractor still withstood any form of damage, was
used as a proof pressure value, as detailed in the VDI
2263 Guidelines, Part 3.
Afterwards, to test the explosion pressure proofness, a
minimum of 1.1 x the proof pressure has to be attained
safely. Deformations are tolerated.
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