Control Filter; Flexpak 800/1000 Dx And Atex; Area Classification; Permitted Materials - Nederman FlexPAK 800 Manual Del Usuario

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powerful blast of reversed air flow is created, efficiently dislodging dust from the filter bags, see
figure 8.

Control filter

The unit is equipped with a control filter, see figure 4B, item 16. The control filter filters the air
after the main filter to ensure that no material continues to the suction source in case of a main
filter breakage. The control filter functions as a safety device and does not increase the filtration
efficiency.
The pressure drop over the control filter is monitored, and a signal is sent to the control unit if the
pressure difference reaches the set value. The pressure difference is preset at 4 kPa /40 mbar / 0.58
PSI.
3.2

FlexPAK 800/1000 DX and ATEX

3.2.1

Area classification

FlexPAK DX is designed to extract combustible and non-combustible dust, but the unit "as a
whole" is not to be placed in an area that is classified as a zone according to directive 1999/92/EC.
It is only the inside of the filter that meets ATEX requirements.
FlexPAK DX may be used with duct systems internally classified as zone 20, 21 or 22.
The product has no
considered a simple filter/silo and does not fall under the scope of the directive 2014/34/EU.*
*Source: ATEX working group considerations; "How should the directive be applied to filter units
and vented silo bins."
3.2.2

Permitted materials

NOTE!
It is of the utmost importance to know the properties of the extracted material.
FlexPAK DX is intended to be a part of an extraction system collecting material with the following
properties:
•
MIE (Minimum Ignition Energy) > 3 mJ.
•
MIT (Minimum Ignition Temperature) > 205 ºC.
•
Kst: See the product identification plate.
•
Pmax: See the product identification plate.
Materials with properties not within the values stated above or if a suppression or flameless system
is used are to be investigated prior to use with FlexPAK 800/1000 DX. Contact Nederman for
technical support and dust application investigation.
WARNING! Explosion risk.
The filter should not be used for filtering fumes from welding processes.
WARNING! Explosion risk.
Do not collect material that may cause ignition or blocking. It is strictly prohibited to collect
material that may undergo dangerous chemical or thermal reactions and/or self-ignite.
NOTE!
Some materials may undergo chemical reactions in combination with humidity/water.
Such humidity may, for example, form if the humidity in the extracted air is condensed in the filter.
WARNING! Explosion risk.
Do not make any changes to this product without consulting Nederman. Adding a relief duct or
changing the spacing or length of filter elements affects the calculations according to EN 14491.
WARNING! Risk of personal injuries.
Use suitable protective equipment: goggles, ear protection and a protective mask.
marking since there is no internal ignition source. The inside is to be
FlexPAK 800/1000 DX EN
25