Products > Rotary filters

SDF Rotary Filters

SDF Rotary Filters are Semi-Automatic Filters: Back-Flush cleaning is maintained simply by opening the drain valve and rotating the filter’s body a couple of times around its center tube.

There is no need to dismantle the filter or to replace any cartridge.

This advanced design provides an infinite number of self-cleaning cycles, each made by a reverse flow of clean water (“Back-Flush”).

The SDF Rotary is a permanent self-cleaning filter that never needs any cartridge replacement.  

A fragmentary illustration of the Rotary Filter is shown below. Dirty water flows in via the center tube, than circulated to the exterior of the filtration disks stack and infiltrated to the inner chamber, and clean water flow out via the left end side of the center tube. The rotating body is designed with internal longitudinal ribs which make eight peripheral cells, seven are used for filtering and one for back-flush. When the drain valve is opened a reverse flow is initiated and the dirt is washed through the back-flush cell, the reverse flow cell, then out of the drain valve. Rotation of the body sweeps the back-flush flow over the other cells and around all the disks, till after a couple of turns the filter is completely cleaned.

The SDF Rotary Filter is currently available in two sizes:

 

* DF 1” pipe diameter for flow rate up to 5 m3/h. (20 GPM). click here

* DF 2” pipe diameter for flow rate up to 25 m3/h. (100 GPM). click here.