Non-stop Backwashing Contact Filter

ExcelFilter is an up-flow, deep bed, granular media filter with continuous backwash. The filter media is cleaned by a simple internal washing system that does not require backwash pump or storage tank.

The backwash of the sand is the most important process feature for this type of filter. The sand is taken from the bottom of the tank and pumped by
an airlift system into the washing chamber which then channelled it back to the top of the sand bed.

ExcelFilter is equipped with a advanced and precise sizing of backwash facility which can adapt to a wide variation and fine setting of the backwash parameters.

Type Filtration Area(m2) Tank Diameter (mm) Tank Height (mm) Weight full of Water (Tons)
EF 5.0 5.0 2500 6500 39


  • Minimum water is lost by over wash system
  • Ease of operation with a single automatic operation
  • Very low operational head loss allows gravity feed in many cases
  • Well equipped with operational control and fine setting device to optimise reject water and control of water quality


Ranhill Water Technologies Sdn. Bhd.
Suite 1203, Level 12, Plaza Permata,
No.6 Jalan Kampar, Off Jalan Tun Razak, 50400 Kuala Lumpur, Malaysia
Tel: +603-2716 5625/5606/5621 Fax: +603-2716 5626 Email: