Explosion Protection - Nederman FlexPAK 800 DX Manuel D'instruction

EN FlexPAK 800/1000 DX
NOTE! It is of the utmost importance to know the properties of the extracted material.
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.
FlexPAK DX is intended to be a part of an extraction system collecting material with the
following properties:
•
MIE (Minimum Ignition Energy): See the product identification plate.
• MIT (Minimum Ignition Temperature): See the product identification plate.
• 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.
3.3

Explosion protection

The CE and ATEX markings on this unit ensure both a high level of safety and protection
against ignition of the collected combustible dust. However, if an explosion occurs due to
misuse, insufficient maintenance or faulty installation, this unit is equipped with additional
protection methods to avoid dangerous pressure build-up in the filter.
FlexPAK 800/1000 DX is equipped with one of the following protection systems.
• Explosion venting, see figure 2A.
• Explosion suppression system, see figure 2B.
• Flameless venting.
3.3.1 Explosion venting
NOTE! The risk area may extend beyond the values given above. The final risk area is to be
evaluated with regards to affecting factors found in Standard EN 14491.
NOTE! For assistance and information, contact Nederman.
The harmful effects of an explosion are minimized by venting the pressure and flame of
the explosion through an explosion relief panel, see figure 2A. In case of an explosion,
the resulting flame and pressure escape through the explosion relief panel which is to be
directed towards a safe area without any people. This area is referred to as the 'risk area'.
The risk area is to be clearly marked, for example with a fence, warning lines and signs, and
entry is prohibited when the filter is in operation. The area is to be free of any flammable
or combustible material or other objects which may be damaged by the flames and
explosion pressure.
The general size of the risk area is shown in figure 3. The following dimensions apply:
• A = 10 m (32.8 ft)
•
B = 5 m (16.4 ft)
3.3.2 Explosion suppression system
With an explosion suppression system, the early stage of an explosion is detected with
optical and/or pressure-sensitive devices, and an extinguishing agent is quickly dispersed
into the filter, see figure 2B. The suppression of the explosion is initiated an extremely short
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