BOLLFILTER Automatic Type 6.18

Automatic filter for treatment of industrial process water

Where a large amount of cooling or process water is re-used in open or closed circuits, the Bollfilter type 6.18 offers reliable filtration for those liquid distribution systems. We are talking; cooling water, potable water and waste water. These three types of water are ideal applications or this filter. Liquid filters must offer the operator at least three key benefits:

  • Reliable day to day use without interruption and disruption, as a result ensures efficiency of the complete system.
  • Precise liquid filtration to ensure a defined degree of purity once treated.
  • Low maintenance with minimal operating costs resulting in little need for manual involvement.

Why the Bollfilter Automatic Type 6.18 is best

The Bollfilter Automatic Type 6.18 is the best industrial process water filter available, this is not a hollow claim, because there are three key advantages:

  • Robust and durable construction based on in-house research and development over many years’, plus the in depth experience in a wide range of industries gained in the last 63 years
  • Precision filter media and a unique cross-flow scouring backflush action
  • The 6.18 is designed to last up to 20 years and has few wearing parts.

As a result, operators can enjoy low maintenance costs throughout the filter’s life.

The filter made for today’s operator

Continuously operating systems in remote areas, or plants without on-site staff are ideally suited to the Bollfilter due to the current trend of minimum manning. This is likely to continue and the reliability of the 6.18 is a must for operators of water filtration systems.

The 6.18 offers the operator many advantages over conical or expanding type filter elements. Featuring cylindrical filter elements open at both ends, with a throttling plate to develop turbulence, creating the scouring effect in backflushing. Technology that takes filtration to a new level.

Less operator costs in man-hours and spare parts because the effective backflushing continuously prevents filter element blockage. Lower dynamic stresses result in longer life over other types of filter element.

  • More reliable separation of solids than conical or expanding elements. Original filter fineness is constant but that cannot be guaranteed with other types.
  • Better cleaning when process water is contaminated by fibrous material.
  • Special profile filter elements with longitudinal surfaces in direction of backflush have proven to be very effective in the pulp & paper industry with high fibre content. Also effective in the water treatment industry with weed & algae.

Design of the Bollfilter Automatic Type 6.18

Robust components make this water filter design a simple option for today’s filtration buyer or specifier, therefore suitable for many situations including these four applications:

  • Potable water pre-screening, in water treatment plants.
  • Final effluent recycling, in sewage treatment plants.
  • Paper and pulp manufacture, for nozzle protection from process water contamination in paper mills.
  • Cooling water filtration, in continuous casting and cooling nozzle spray bars in steel & aluminium making.

Filter body construction

The bearings and flushing bushes are made of high carbon Polytetrafluoroethylene better known as PTFE. The filter housing is made of ductile iron, fabricated carbon steel, stainless steel and super duplex steel. The filter elements and internals are made from stainless steel grade 316 or better as suits the application.

The only moving parts are the flushing arm, cover arm and the flushing bushes that are spring loaded to automatically adjust to wear.

Depending on the conditions of the system and characteristics of the liquids to be filtered a number of alternative options are available. The Bollfilter Automatic Type 6.18 is available in different sizes with connection diameters 50 to 1000 mm for flows up to 10,000 m3/h in a single unit.

Low pressure?

You may need our low pressure option

High level of contamination?

You may need our heavy duty option

Bollfilter UK supply BOLL & KIRCH products to Great Britain and Ireland

The water filters by BOLL & KIRCH are the most important safety components in a water treatment plant. BOLL & KIRCH develops its water filters based on its own research and ensures their compliance with all current technical standards worldwide.

The automatic water filters deliver the strongest performance even in extremely polluted water and under the most difficult of circumstances. long and maintenance-free service lives ensure that operating costs remain at a minimum. Additionally, our water filters guarantee interruption and disturbance free operation.

BOLLFILTER Automatic Type 6.18
Nominal diameter DN 50 - DN 1000
Filter element wedge wire, longitudinal wedge wire candle or wire-mesh candle with smooth surface
Grade of filtration 30 µm - 5 mm*
Backflushing medium internal medium
Pressure stage PN 10 (higher pressure stages available on request)
Filter housing nodular cast iron
carbon steel
carbon steel rubber lined
stainless steel
special alloys
spezielle Legierung
Features cylindrical elements open at both ends (bipolar functional principle)
* depending on the size of the filter

Filters Department Team

Tel.: +44(0)1621 862180