Automatic hydraulic self-cleaning screen filter in Malaysia (Semenyih, Selangor)

Automatic hydraulic self-cleaning screen filter

Process principle of the automatic self-cleaning filter (a)

Water enters  into the  entrance. First,  the primary strainer  filters out  the larger 

particles of impurities,  and  then  reaches  the  fine  strainer.  In  the  process  of  

filtering,  fine  strainer gradually accumulates  impurity in  the water  and forms a 

filter impurities  layer. Due  to the accumulation of impurities layer formed inside 

the filter, the two sides of the fine strainer form a pressure gradient. When the 

pressure gradient reaches the default value, self-cleaning will begin. During the 

self-cleaning process, the cleaning valve opens, the hydraulic components and 

hydraulic  cylinder  motor  room  release  pressure  and  discharge  water,  causing  

the pressure  in  hydraulic motors  room  and  sewage  suction pipe  drops  sharply.  

Due  to the negative pressure effect, the dirt is absorbed by suction nozzle inside the

fine strainer, enters into the hydraulic motor room relaying on the hydraulic motors, and

then discharges from the sewage valve, thus finishes  a suction sewage process. When 

the flow  passes the hydraulic motors, it drives  sewage suction pipe to  rotate whereas 

the hydraulic cylinder  piston drives the sewage suction pipe for axial movement, sewage

suction machine's axial movement and rotation during  the  entire filter,  clean the  surface 

completely.  The entire  washing process 4 takes  several seconds;  sewage valve  closes 

after the  washing.  Then, the  increased  of pressure drives the  hydraulic cylinder piston 

back  to its initial  position, filter will prepare  for the next wash  cycle. In the  washing process,

the filter's  normal operating condition will not be interrupted.

For more information or enquiry, please contact Environmech Sdn. Bhd.
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