Category Limit; Permitted Materials; Atex Components - Nederman FlexFilter EX Manual De Instrucciones

as ventilation, feed out frequency, design of the col-
EN
lecting container etc.
It lies within the responsibility of the customer/end-
user to determine, develop proper documentation and
mark this area according to the Directive 1999/92/EC.
As a general rule improving ventilation and imple-
menting regular routines for cleaning will minimize
the extent of the EX area and reduce the classification
of the zone.
Figure 2 shows a general example of how the EX-area
extends around the FlexFilter EX.

4.3 Category limit

The function of the FlexFilter EX is to be a part of an
extraction system. Even if the FlexFilter EX with
symbol is category 3D equipment for use in zone 22, it
can be used with piping system internally classified as
zone 20 or 21.
The internal side of the FlexFilter is generally classi-
fied as zone 20 or 21.
As there is no internal ignition source inside the Flex-
Filter EX, the inside is to be considered as simple fil-
ter/silo and does not fall under the scope of the dir-
1
ective 94/9/EC .

4.4 Permitted materials

It is of utmost importance to know the properties of
the extracted material.
The FlexFilter EX is intended to be a part of an ex-
traction system collecting material with the following
properties:
MIE (Minimum Ignition Energy) > 1 mJ
MIT (Minimum Ignition Temperature) > 205 ºC.
Kst: See the product identification plate.
1 Source: ATEX 2014/34/EU Guidelines 2017 § 243 Filter units and vented silo bins.
32
FlexFilter EX
Pmax: See the product identification plate.
Materials with properties not given within the above-
stated values must be investigated prior to use with
the FlexFilter EX. Contact Nederman for technical sup-
port and Dust Application investigation.
WARNING! Risk of personal injury
Do not collect items that may cause ignition or
blocking. It is strictly prohibited to collect ma-
terial that can undergo dangerous chemical or
thermal reactions and/or self-ignite.
Some materials may undergo chemical reac-
tions in combination with humidity/water.
Such humidity may, for example, form if the
humidity in the extracted air is condensed in
the filter.
WARNING! Risk of personal injury
Do make any changes to this product without
consulting Nederman. Adding a relief duct or
changing the spacing or length of filter ele-
ments affects the calculations according to EN
14491.

4.5 Atex components

The FlexFilter EX comes equipped with several elec-
trical and mechanical components which fall under the
scope of the ATEX directive 94/9/EC.
To maintain a high level of safety with regards to
the product classification, the individual ATEX com-
ponents of the FlexFilter EX should not be altered
or tampered with. Components, such as solenoids,
magnetic sensors and the terminal box must be main-
tained according to their respective component
manual. Chapter 13 Electrical installation
ther information regarding the ATEX approved ter-
minal box.
contains fur-