Self-Cleaning Filters (Slot Tube Filters)

Our series DELTA-STRAIN and DELTA-SCF (Slot Tube Filters)

  • Slot tube filter for the filtration of hydrous, viscous, high-viscous and pasty media
  • Flow capacity up to 250 m³/h (in relation to clean water)
  • Mechanical forced cleaning by flexible scraper-blades of stainless steel or platic
  • No interruption of flow during the cleaning and the removal of dirt
  • Minimum loss of the media during the discharge of dirt
  • Low operation costs due to a long service life of filter elements
  • Simple and time-saving maintenance without special tools
  • Filter rates nominal from 25 µm up to 8000 µm
  • Slot tube filter in welded design of stainless steel or painted carbon steel
  • All inserts of high-grade stainless steel
  • Laser drilled or perforated elements for fibres, algae und gel-like particles
  • Manual or motorized drive
  • Motors for all wedge wire filters of the DELTA-STRAIN series are available in efficiency class IE2 (High Efficiency)
  • ATEX-conformable acc. to EU directive 2014/34/EU
  • More effectively than Backflush-Filters (e.g. lower loss of media)
  • Design and calculation acc. PED 2014/68/EU depending on the Filter type
  • For tests a number of filters are available
  • Optional TÜV-acceptance, Ex-protection, special voltage, higher pressure and temperature, heating
    jackets, special materials, special seals, paintings, mechanical shaft seals, perforated and hardened
    filter elements, differential pressure indicators, sluices, full automatic control systems etc.
  • Custom design (e.g. ANSI-flanges, NPT-thread etc.)

All self-cleaning filters of the DELTA-STRAIN series are available in accordance with the ATEX directive 2014/34 / EU for use in EX zones 1 and 2 (group II, category 2G or 3G). The certification and issuance of the EC certificate was carried out by TÜV Product Service GmbH.


Principle of operation of the wedge wire filter

Selbstreinigende Filter Abstreifer

The polluted medium flows from outside to inside through the metallical, cylindrical filter element. Dirt particals which are bigger than the slot of the element, stick on the surface of the element. These particles will be removed with the scraper-blade by turning the element and the dirt sinks to the filter sump. From there the dirt can be purged in intervals manually with ball-valves or automatically by sluices (with minimum loss of medium). The cleaning and discharge occur without interruption of the flow. This ensures a continuous use of our self-cleaning filters. For gel-like and fibrous particles special laser drilled or perforated elements are available. Those were developed especially for applications where conventional slot tubes could not be used e.g. the filtration of algae, fibres etc. out of water.

Do you have further questions about us or one of our products?
Our team will be pleased to assist you. We offer our customers an optimum standard of quality, service and profitability.