Vacuum Filter

  • U 0,25 K - U 28 (0,25 - 28 m² Filterfläche)


Vacuum filters are used for cleaning impurified cooling lubricants in the fields of metal working and rolling mills. Cleaned cooling lubricants have longer service lives, improve the surface quality of the work piece or rolled products and serve to dissipate heat at the place of machining or shaping.

diagrammatic view of a vacuum filter


  • small installation space
  • extremely good filtration results
  • low cost of installation
  • low cost of maintenance
  • low price
  • on request, without consumable non-woven, with rotating belt and washing device
  • in case of difficult filtration processes and operation with non-woven, considerably less consumption of non-woven compared with gravity filters operated with non-woven

mode of operation

The impurified cooling lubricant runs via a piping system (1) and an inlet distributor (11) into the dirty area (2) of the vacuum filter tank. From the dirty area, the impurified cooling lubricant is sucked by the filter pump / system pump (16) through the filter medium (17) and the slotted screen (3) into the clean area (4) and pumped via the system flow pipe (15) to the processing machines. The solid particles are held back and form a filter cake (5) on the filter medium.

As a result of the build-up of filter cake, the differential pressure in the lower chamber (4) of the vacuum filter rises. If an adjustable underpressure is exceeded, the regeneration of the filter is initiated. During regeneration, the machines are supplied from the regeneration tank (6) of the vacuum filter, so that a continuous supply to the machines is always guaranteed.

During regeneration, the drag type conveyor (7) is activated via the drive head (13) and the filter belt (17) is conveyed. The belt is conveyed a little further during each regeneration. The dirt is thrown off into a container (8) via a discharge worm (12). The rotating filter belt (17) is washed in a washing device (10), tightened by the automatic tightening device (9) and is thus available for a new filtration application. A new filtration cycle now begins, during which the clean tank (6) is refilled.

The entire functional sequence is fully automatic and controlled via a control cabinet (14) with a luminous circuit diagram.


the standard equipment of a vacuum filter includes:

  • tank, divided up into a dirty chamber and a clean chamber
  • regeneration tank
  • filter and system pumps
  • rotating filter belt
  • belt tightening device
  • belt washing device
  • lower chamber washing device
  • discharge worm
  • control cabinet
additional optional equipment:
  • injector suction device
  • pressure control station
  • floating suction device
  • skimmer
  • take-up reel for operation with non-woven
  • accessible coverings
  • impact head for predegassing
  • oil-fume suction device

area of application

Vacuum filters are used for the supply of individual machines and groups of machines within central supply installations.

The following sizes can be supplied:
  • compact small filters for the supply of individual machines
    • U 0,25 K (0,25 m² filtration surface)
    • U 0,5 K (0,5 m² filtration surface)
    • U 0,75 K (0,75 m² filtration surface)
    • U 1,0 K (1 m² filtration surface)
  • vacuum filters for the supply of groups of machines
    up to U 28 (28 m² filtration surface)

compact vacuum filter U 0,5 K for the supply of a grinding machine

U-0,5 K (compact filter)

filtration area: 0,5 m²
volumetric flow: 120 l/min
medium: oil/ water emulsion
material: steel
type of machining: grinding
execution: compact vacuum filter for the individual supply of a grinding machine

Filter types applied by the filter fineness and the specific filter performance

The specific throughput rates in question are the filter-specific base capacities. They represent reference values for the interested customer.

F.E.S. supervises each filter completely from the initial request to the turnkey handover to the future operator. Each filter system is specifically designed and custom-tailored to the case of operation at hand. For this purpose, we utilise our experience values, company-internal laboratory tests and, if necessary, mobile test installations for application 'on location'.

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