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Dual Media Filtration

Envirotech offers  MILD Steel (MS) Epoxy Painted and rubber Lined Filters which are available from 200 mm to 3600 mm diameter sizes and from 1 M3 to 100 M3/hr flow rate and are designed and operated on filtration rate of 12-20 m/hr.

Dual media filter contain anthracite along with fine sand reinforced by marbled and gravels. These filter consist of a coating of anthracite (1.25-2.5mm) resting on a coating of fine sand (1-1.5mm) Anthracite is coarse and has more dirt holding capacity as compared to fine sand. Dual media filters are used in places where the raw water contains suspended contaminants, turbidity and iron. Dual media filters provide very efficient particle removal under the conditions of high filtering system amount. These filters use layers of anthracite and garnet contaminants as the filter medium, with filtering system amount of 98% down to 2 microns. The dual media filters employ an automatic backwashing feature, which employs a variety of air and water to maintain unit efficiency.

Advantages and Features

  • Efficient Turbidity and TSS Removal
  • Filter up to 20 – 30 Microns 
  • FRP, CS, MSEP, SS Vessel available
  • ASME Pressure Vessel is also available
  • Two, Three and Multi layer filters 
  • Low Pressure drop across the vessel
  • Air scouring available for high flow pressure vessel
  • Manual, Semi Automatic and Automatic features are provided 
  • Long filter cycles between backwashing with minimum loss of pressure. 
  • Pneumatic and electrical operating automatic valves 

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