Mitarbeiter der KNOLL Maschinenbau GmbH montiert Feinstfilter MicroPur®
Feinstfilter MicroPur - KNOLL Maschinenbau GmbH


The MicroPur® is a reverse-flow filter for separating the finest impurities from cooling lubricants (oils and aqueous solutions).

• Ideal for tool grinding in carbide and HSS
• Local use for a machine as a standardised individual system
• Central use for multiple machines as an individual central system
• For cooling lubricant maintenance in the bypass flow



High Filter fineness (1-3 µm)

Consistent high-quality of the cooling lubricant

Faster and more effective regeneration cycle

Low backflush volume for treatment

Recovery of valuable raw materials at low expense

High efficiency

Fast replacement of filter cartridges

Cost-effective maintenance

Backwashable filter cartridges with long service life

Low costs for consumables

Demand-based pump regulation and backflushing without air

Energy-efficient system operation

Flexible modular system with low space requirements

Can be applied to a wide range of applications and requirements


Filtering process

  1. The filter pump conveys the dirty cooling lubricant tangentially into the filter bowl
  2. Centrifugal force causes larger solids to accumulate on the housing wall
  3. The cooling lubricant flows through the filter elements from the outside to the inside
  4. A filter cake (concentrate) forms on the surface of the filter element and acts as an additional deep-bed filter aiding microfiltration
  5. The filtered cooling lubricant (filtrate) enters the clean tank


Regeneration process

  1. The growing filter cake causes a reduction in the volumetric flow or an increase in the pressure differential at the filter cartridge
  2. The regeneration phase starts in response to pressure or time control: The intake valve closes and the drain valve opens
  3. The flushing pump conveys the cooling lubricant that has just been cleaned to the filter element, from the inside to the outside
  4. The filter cake is released and enters the sludge tank
  5. Downstream equipment for sludge treatment (automatic concentrator) further reduces the concentrate and conveys it to an external container



Filter systems

Superfine filter MicroPur®

Data sheet
Data sheet
pdf (2 MB)
Filter systems

User report HiTeCH

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User report Emuge

User report Emuge
User report Emuge
pdf (277 KB)
Filter systems

User report Schnebelt

Overview of our filter range: