sand filter

As comfortable as it looks!


sand filter

The Multi grade Sand Filters is a depth filter that makes use of coarse and fine media mixed together in a fixed proportion.

This filter performs at a substantially higher specific flow rate than conventional filters. Specific flow rates of 15-30m/h have been successfully obtained for treating water containing 50-25ppm suspended solids respectively to produce a filtrate with less than 5pm.

Features :

  • Higher specific velocity.
  • Raw water can be used for backwashing the filter.

Advantages :

  • Higher specific flow rate than conventional down flow filters thereby saving on Space & cost.
  • Very little maintenance required.
  • Lower backwash water requirement.
  • In most cases, raw water can be used for backwash.

Applications :

  • The Multi grade sand filters filter is an ideal choice for all applications where a conventional sand filter is used.
  • It is extensively used in side stream filtration of cooling water & in potable water treatment.
  • It is ideal for filtration of clarified water.
  • In addition it finds application in sea water filtration & in filtration of chemical solutions.
  • For these types of filtrations rubber lined or epoxy painted filters can be offered.

Specifications :

  • One vertical cylindrical Mild steel/FRP pressure vessels with dished ends. Mild Steel pressure vessel are painted internally with anticorrosive bitumastic paint and externally with a protective coat of red oxide primer.
  • One set of internal water distribution & collection system.
  • One initial charge of filter sand & underbed material
  • One set of frontal pipe work & valves.
  • Two pressure gauges to monitor head loss across the filter.
  • One orifice board (optional) for indicating wash water flow to be fitted in drain sump. Maximum / minimum operating pressure will be 3.5kg/cm2g & 2.0 kg/cm2g respectively.
  • Multigrade sand filters are available from 600 to 3000mn diameters.

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