Filtration Systems

Filtration Systems

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Filtration Systems

Why do I need one?

The use of a water filter removes components that cause fouling in water-based systems.

Filtering the water minimises the problems caused by fouling. This can be due to suspended solids such as reduced heat transfer, pipe work blockages also colour issues, organic contamination etc.

Sometimes they are used to reintroduce chemical components into a system.

When would I use it?

In an industrial or domestic situation, sometimes as the only step, but often prior to other sensitive types of water pre-treatment plant such as softening and reverse osmosis. Commonly used in river water abstraction, potable water production, rehardening, laundries, boilers, food processing, Pre-treatment, cooling towers, boreholes, carwashes, CIP systems etc.


What is it?


It is normally some form of specialised filtration media such as sand, gravel, or activated carbon.

Suspended solids are removed by physically filtering the water through the media. Other contaminants such as Iron, Manganese, Organics, Chorine, Nitrates or Arsenic may also be removed or exchanged. magnesium carbonate, manganese dioxide or other specialised media depending on the application. 

Mechanical/Self Cleaning

Normally used for suspended solids removal. The advantage of a self-cleaning filter is that as it becomes fouled it will clean itself discharging the suspended matter to drain

Disposable or Exchange

Disposable cartridges are made up of numerous fibre zones, providing a graded structure throughout the filters depth. Having multiple zones means our filters can perform for longer through the use of depth filtration. Filtration range is between Gradients ranging from 1 – 100 microns.



What do I need?


  • The media is normally contained within a cylindrical vessel.
  • Backwash of the units is normally by time clock control, water meter, or pressure differential switch or a combination of the latter.
  • Exchange units have to be returned for refilling to an appropriate specialist (PWEL can offer an exchange).
  • Supplied as either a single vessel (simplex), or as two duty/standby vessels (duplex). For very large systems multiple vessels may be employed (triplex or even more) 

Mechanical/Self Cleaning

  • Single or multiple suitable self-cleaning stainless steel or GRP filters with appropriate valving and controls.

Disposable or Exchange

Appropriate external single or multiple filter housings in either:

  • polymeric
  • stainless steel
  • steel material



The removal of any fouling potential within the water thus mitigating the need for expensive cleaning processes, organic and biological fouling (if correctly maintained) improving heat transfer and allowing other sensitive plant to work correctly.


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