Infastaub GmbH

The filters Infa-Lamellen-Jet AJL and AJLS are highly efficient aspiration filters for separation of dry, non-sticky dusts. Filters of this series achieve a maximum filter surface area on minimum space requirements because of their pleated filter elements (filter lamellas). The series is designed for volume flows of approx. 2,000 up to approx. 40,000 m³/h. For special applications Infastaub equips the Infa-Lamellen-Jet with the „first rinse“ system. With this option the filter elements and the inner walls of the filter housing are moistened with water prior to opening the raw gas area. The exchange of the filter ele-ments is carried out fast and simply via a big frontal maintenance door.

Main range of applications

• For central de-dusting of machines and workplaces covering volume flows between 2,000 and 40,000 m³/h (one chamber or multi-chamber filter)
• For separating dusts in the industries food, chemistry, pharmacy, plastics, rocks and minerals, cement/lime/gypsum, energy (combustion power plant) etc.
• For dry and little adhesive dusts and residual dust contents down to 1 mg/m³

In addition the pleated element filter can be supplied with a secondary filter stage, called type AJLS, as it is specified for e.g.the pharmaceutical industry. Because of the downstream particulate filter cassette a residual dust content of < 0,001 mg³/h is achieved.

The 1st filter stage is regenerated by jet pulses of compressed air, the 2nd filter stage serves as so called safety filter and is changed after reaching its saturation limit. The lamella elements can be precoated additionally or run with a continuous addition of additives. The filter surface is much larger compared to flat filter elements because of the pleated filter fleece

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The de-dusting unit AJP ./..1 with pneumatic cleaning unit is a cartridge filter for central de-dusting of machines and working places. Infastaub has designed the stand filter for dry and less adhesive dusts.

Choices out of different basic modules of this system permit a flexible adaption to the procedure-technical demands. The basic unit needs only 1 m² surface area. The filter cartridges are changed - to save construction height - from the raw gas side. Access to the filter cartridges is provided by a big door on the front side.

A new addition to the modular system is a second, non-cleanable filter stage which is downstream the cartridge filter. This so-called "police filter" prevents from unwanted dust issue in case of a filter rupture.

The Infastaub filter series Infa-Micron is a complete series for dedusting of sophisticated processes where toxic dusts or powders, e.g. API (Active Pharmaceutical Ingredient), occur. Lowest residual dust contents up to 0.001 mg/m³ and reliable protection of staff during operating and maintenance are demanded for these applications. Cassette filters MKR and MKM as well as cartridge filter MPR are applied for these special demands.

Requirements for operating safety and protection against contamination plus consideration of health and environmental aspects while de-dusting require a special construction and manufacturing of these filter units. Risks during filtration of high active ingredients, harmful or toxic dusts and suspended matters are minimized with these units.

The range of the Infa-Micron filter series permits its use for a multitude of mostly dangerous manufacturing processes. The specific demands of the most different areas of application were considered at construction. The modular design of the filter series allows an optimum of flexibility. Extra equipment or individual components for special purposes or building conditions can be produced by request. Thus customised unique filters are available on the one hand and favorable series modules on the other hand.

Change of filter cartridges and filter cassettes can be performed on all Infa-Micron filter units without any tools. If requested, the inspection covers can be opened without screws or other laborious locking devices with only few moves. The filter cartridges and filter cassettes are tightly fixed with pneumatic (for MKR and MKM alternatively also mechanical) fastening devices in the filter unit.

Measures of constructive explosion protection ensure safety while operating the filter units. In case of an explosion in the raw gas area of the filter the extending flame front is held back in the filter elements of the 1st filter stage. The resulting explosion overpressure is relieved into the clean gas side above the 1st filter stage, so that explosion overpressures of only max. 1 bar g rise within the filter housing. Because of pressure shock resistant construction the explosion is kept isolated inside the filter. Explosion pressure relief or explosion suppression systems are not necessary.

This was proved by explosion tests for dusts of dust explosion class St2 as well as gases of groups II A and II B and for hybrid mixtures.

The main fields of application of Infa-Micron filter units:

• Production of potential dangerous or valuable products
• Dust-raising processes as e.g. mills, tablet presses, granulators, coaters, mixers and packaging machines
• Potentially explosive dusts, gases and hybrid mixtures
• Processes with highest demands on residual dust content, functionality, safety for operating and maintenance as well as availability
• Branches chemistry, pharmacy, metal / heavy metal, disposal, hazardous waste, recycling, nuclear technology etc.

The pocket filter INFA-MAT AM is a sturdy and easily mechanical cleanable filter unit. Because of the compact design the installation is also possible in case of constricted space. The proven shaking system of Infstaub ensures an effective cleaning of the filter cloth at low investment and maintenance costs.

The modular variety of the INFA-MAT pocket filter series allows an optimum adaption of the filter units to specific needs. Several types are possible for different dedusting tasks:

• Vent filters with/without fan for dedusting of conveyor equipment or silos
• Dedusting unit with hopper and dust bin.
• Also available with integrated fan.
• Design possible as one chamber filter or multi chamber filter
• Bag emptying filter consisting of sack discharge, filter unit and integrated suction fan
• Optional secondary filter stage for residual dust contents less than 1 mg/m³
• Filter surface from 6 - 180 m² for volume flows up to approx. 16,000 m³/h

INFA-JETRON AJP 224 silo filters are fully automatic venting filters for de-dusting of exhaust air from silos, containers or machines. Filter units of this series are generally suitable for all processes, where a dust/air mixture continuously arises over a long period of time.

Motivated by the strong market resonance, Infastaub has extended the filter series by a new design. All parts in contact with the product and also the clean gas side can be manufactured in stainless steel. This qualifies the filter units in particular for the food, chemical, pharmaceutical and plastics industry. The filter elements are food safe according to EG 1935/2004 and EG 10/2011.

The pneumatic cleaning and high filtration performance of the AJP enable a very low residual dust content, also suitable for returning the exhaust air back to working places. The long life time and maintainability leads to low costs for spare parts and maintenance.