Explosion protection

Explosion protection

Process-safe explosion protection for man and machine

Explosion protection
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Constructive explosion protection through the principle of partial filling
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Highest safety when using the dust extractor

Our explosion protection technology

For maximum safety

HET Filter is a leader in the integration of explosion protection measures into filter systems to ensure the highest safety standards. Our approach to explosion protection comprises a comprehensive strategy based not only on the prevention of ignition sources, but also on the effective control of potential explosion hazards.

Our filter systems are not only electrically dissipative to prevent static charges, but are also designed so that they do not generate their own ignition sources. The constructive explosion protection of our systems is based on an explosion pressure shock-resistant design. This means that in the event of an explosion, the pressure within the system is controlled, with the filter cells acting as an effective flame arrester.

HET Filter’s innovative approach to explosion protection makes it possible to handle dusts with a specific maximum explosion pressure (pmax) of 10 bar. Even if a pressure surge occurs, the system is designed in such a way that the pressure is reduced internally to such an extent that it can withstand it. This internal pressure relief ensures that the filter system remains intact even in the event of an explosion and that the collected dust remains safely in the filter.

Our filter systems also comply with the ATEX Directive 2014/34/EU and numerous other relevant standards and directives. Our close cooperation with notified bodies ensures that we can offer the best possible explosion protection for our customers’ processes. At HET Filter, explosion protection is at the heart of our commitment to safety by continuously investing in advanced technologies and solutions to maximize protection against explosive hazards.

G
(Gase, Dämpfe, Nebel)
D
(Staub)
KategorieBetriebsmittel geeignet fürKategorieBetriebsmittel geeignet für
1GZone 01DZone 20
2GZone 12DZone 21
3GZone 23DZone 22

Things to know about the topic

Explosion protection

Filtration

Filtration

Ensures clean air

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Containment

Containment

safe protection against hazardous substances

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HET Filter systems

Our product variety

Tailored to your area of application, we can supply you with filter systems and filter cells from a single source. The modular design of our filter systems gives you a wide variety of options.

You want to learn more?

Contact us!

We will be happy to advise you on all topics relating to your project and your filter system.
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Highest explosion protection

Ex100

The filter system is electrically conductive and does not generate its own ignition sources.

Ex200

Due to its explosion pressure shock resistant design, the filter system offers constructive explosion protection based on the principle of partial filling. The explosion pressure is relieved internally via the filter cells, which also serve as an effective flame arrester.

Dusts with a specific pmax of 10 bar can be handled, as the pressure surge is reduced internally to 1 bar. Due to this internal pressure relief, the system does not suffer any permanent damage even in the event of an explosion.

The offered filter unit is designed according to ATEX Directive 2014/34/EU and approved and certified by FSA Mannheim, notified body 0558.

In the event of an explosion, no permanent deformation occurs according to the explosion test, even with dusts up to a Kst value of 590 bar*m/s.

From a Kst value of 300 bar*m/s, a blocking slide valve for the primary filter cell and a flap monitoring system must be provided for this purpose.

After internal cleaning, filter replacement and functional testing, the filter system can continue to be operated without any further measures.

In the event of an explosion, no permanent deformation occurs according to the explosion test, even with dusts up to a Kst value of 590 bar*m/s.

From a Kst value of 300 bar*m/s, a blocking slide valve for the primary filter cell and a flap monitoring system must be provided for this purpose.

After internal cleaning, filter replacement and functional testing, the filter system can continue to be operated without any further measures.

Special Features:

  • In the event of a dust explosion, the filter housing is not damaged
  • The special arrangement of the filter cells acts as an effective flame arrester to prevent ignition on the clean gas side
  • Explosion pressure and heat are dissipated via the filter cells.

No external pressure relief or explosion suppression measures are required, which is a huge cost advantage.