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The mobile small dust extractor for flexible use in the cleanroom.

Technical information
HETdynamic
HETdynamic
HET dynamic

The mobile small dust extractor

As a small mobile dust extractor, the HETcompact is characterized in particular by its flexibility and efficiency. Designed for use in sensitive environments such as the pharmaceutical and chemical industries, it meets all the necessary standards to deliver optimum results even under stringent conditions.

In addition to its suitability for toxic and respirable dusts, which pose a high risk to health, the HETcompact offers outstanding functionality: the filtered clean gas is not only returned to the room air efficiently, but also safely, which is crucial for cleanroom environments. The innovative safe-change system enables filters to be changed without direct contact with dust, which significantly increases the safety of operating personnel and minimizes the risk of contamination.

Furthermore, the HETcompact is not limited to the pharmaceutical and chemical industries. Its mobile and compact design makes it a versatile device that can also be used effectively in other industries such as food processing, metalworking or workshops where clean air and dust control are crucial. Its adaptability to different working environments and its dust removal performance make the HETcompact an ideal solution for a wide range of applications where a powerful small dust extractor is required.

HETcompact

Advantages

  • Up to three HEPA filter stages in one system
  • Safe containment up to OEB 4
  • GMP compliant design
  • Mobile, easily movable small dust extractor
  • Explosion-proof housing with safe grounding
  • Cleaning system for backwashing the primary filter by means of cleaning cylinder
  • Plant in welded version
  • Conductive equipment for almost all ATEX categories
  • DEHS measuring points for qualification of the safety filter stage

Features

Tightness tested

Highest containment level due to safe filter replacement

Highest explosion protection

Technical information
Filter classH13/H14 according to DIN EN 1822
Volume flow200 – 500 m³/h
Operating modediscontinuous
Rohgasstaubbeladung5 – 4.500 mg/m³
Raw gas dust loading< 0,0001 mg/m³
Pressure loss of the system300 – 2.500 Pa
Housing designStainless steel
Technical data

Options

GMP compliant design
Secure and comfortable closure system
Filter qualification
Qualified DEHS measurement
To the accessories

Technologies

Technical data
Filtration

Filtration

Containment

Explosion protection

other filter systems

Filter system for low dust loads

HEPA filter for highest demands

The cleanable filter system

Filter system for low dust loads

HEPA filter for highest demands

The cleanable filter system

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Leak test

Dust-tightness: Due to the closed design and operation under negative pressure, it is ensured that no dust particles can leave the filter housing.

Gas tightness: A defined leakage of <1% of the housing volume is guaranteed within 6 minutes, based on a test pressure of 2,000 Pa.

Highest containment level due to safe filter replacement

Circumferential double groove profiles on the filter openings for filter change using Safe Change technology. (bag-in-bag-out)

The filter bags are designed as foil bags made of polyethylene with gridded black strips consisting of polyethylene and carbon powder. This gives the filter bag dissipative properties and makes it suitable for combustible dusts and gases.

In addition, the foil bag is provided with welded-in side pockets to facilitate handling during filter change and to shorten the process time.

The rubber rings for fastening the bag in the double groove profile are designed as hollow cord rings, which ensures that the bag sits firmly and securely in the groove profile of the change frame. A tab on the rubber ring ensures easier handling during filter change.

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.

GMP compliant construction

The system housing is designed to be GMP-compliant. Protrusions and undercuts were avoided where technically feasible.

Raw gas hoppers, dust discharge and maintenance doors are enclosed, providing easy-to-clean surfaces. Furthermore, the back of the plant with raw gas duct and WIP system is also clad.

Secure and comfortable closure system

HET clamp 100

Sealing Tool

Basic version of the pincer system for safe separation of Safe Change bags. (cable tie)

HET clamp 200

Sealing Tool

For safe OEB4 operation, the HETclamp200 closure system is required and used for filter and dust discharge changes.

Two special pliers, for sealing as well as for cutting off the special clamps, ensure a secure and dust-free sealing of the Safe Change bags.

Filter qualification

The filter system is equipped with DEHS lances for qualifying the separation efficiency of the first and second filter stages:

  • Test medium application in the raw gas channel
  • Measuring lance for raw gas concentration determination in the hopper
  • Measuring lances (3 pieces) after the primary filter stage for qualification
  • Ring line for uniform feeding of the raw gas concentration upstream of the secondary filter stage
  • Measuring lance for raw gas concentration determination
  • Measuring lances (5 pieces) after the safety filter stage for qualification

The secondary filter stage is designed with the so-called tightness test. A test overpressure is applied to the test groove covered by the filter seal. The correct seating of the filter cell is validated by measuring the leakage flow (<16 l/h).

Qualified DEHS measurement

HETperformance stands for various options for checking the filter system in terms of design, functionality and safety.
These criteria are also important in the pharmaceutical industry:

  • Is the plant and its components built safely?
  • Can it be used in explosive atmospheres?
  • Is the plant tight?
  • Can it be used in clean rooms?
  • Do any hazards emanate from the plant?
  • Can it be used under containment conditions?
  • Does the system serve its purpose?
  • Can it filter the hazardous substances out of the air reliably and efficiently?
    At the core of HETperformance are measurements and validations of the filter system for both optimization and protection of employees and the environment.