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Enhanced operational reliability by filtration

28.08.2018

By Janne Rantanen, Product group manager / Regional manager

Water purification includes a wide variety of possibilities to achieve the desired result. Filtration is a very popular and simple method of water purification.

The purpose of filtration

Filtration is used to remove e.g. solids from water and other heat transfer liquids. The filtration need is influenced by water quality and the set water standards. Water quality varies depending on the origin of water e.g. surface water, well water or municipal water. The quality of municipal water may be sufficient for household use but not for industrial applications.

Water filters are used in many industrial applications such as cooling, aqua heat recovery and ventilation systems. Without filtration deposits and other impurities circulate in the system causing corrosion and increased energy consumption. They may also block the system and disturb the operation of regulating units.

Criteria for filter selection

Choosing the right kind of a filter for each purpose depends on the following criteria:

  • System (type): heating, cooling, heat recovery, district heating, sealing water, cooling tower etc.
  • Volume of water (if a closed system)
  • Origin of water: municipal water, untreated water, river or lake water, mechanically processed water, chemically purified water, district heating water, water-glycol solution etc.
  • Worst contaminator: deposits, iron sediment, dirt, humus, sand, dust, turf etc.
  • Flow rate of water/liquid: m3/h or l/s
  • Connection: main flow or by-pass
  • Diameter of connection
  • Maximum water/liquid temperature
  • Maximum water pressure
  • Desired filtering degree
  • Total solids (if known)

Filter applications

Our versatile filter range includes filters which are suitable for various purposes.

Acid resistant KK-bypass filters have a washable filter bag and permanent magnets which accumulate fine iron particles from water. These filters are used for filtering solids from water and glycol-based systems. They are also suitable for different filtration needs in food and process industries.

TS bag filters are fit for various filtration needs in industrial processes because of their durability and excellent filtering performance. They can also be used in water treatment in general, as pre-filters, for the filtration of resins and for various applications in the environment industry. TS bag filters are also available for water pressure up to 16 bar. These models are suitable for district heating systems.

TS-M magnetic filters are made of stainless steel. They are applicable for the filtration of solids and magnetic precipitations in water and glycol-based systems. Thanks to their versatile size and installation options TS-M filters are suited for use in heating, cooling, ice water and glycol-based systems.

Judo backwash filters are available for cold and hot water applications. Manual and automatic models of cold water filters are suitable for the filtration of tap water. Hot water filters are equipped with a deaeration system which removes detrimental gases from heating systems.

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