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Filters

Types :

  • Pressure sand filters / Activated carbon filters.

Selection :

  • Loading 10 to 15 cum/sqm/ hr.

Media arrangement in PSF & ACF :

  • GRAVEL 1” – 100mm height.
  • SILEX COARSE ½” – 100mm height.
  • FINE SILEX ¼” – 100mm height.
  • SAND – 450mm height.
  • ACTIVATED CARBON – 450mm height.

Valve types for automatic operation:

  • Solenoid Electrically operated
  • Butterfly valves (actuator)
  • Pneumatically operated

Air scouring rate

  • 0.6 cum/ sqm/min
  • for filters above 2 M diameter.
  • MOC – MS / MS rubber lined vessel pipe line should be hot dip galvanized for protection from inside and for long life.

Test pressure :

  • 5 kg/sqcm
  • INLET – Inverted cone , more than one if higher diameter.
  • OUTLET – Perforated cup / header lateral above 2 M diameter.
  • Code : ASME, sec VIII or IS 2825

Latest trends :

  • Dedicated PLC panel for the filters.
  • Automatic operation for feed pumps, back wash pumps, filter valves.
  • SS pipe line.
  • Use of anthracite in sand filter making it a dual media filter
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