600mm tank height automatic backwash sand media filter for water treatment

Advantages: Tank thickness:4/6/8/10mm Water collector inside tank: stainless steel

Technical requirements

》Min. pressure: 0.15Mpa
》Max. pressure:1.0Mpa
》Working temperature:<65℃
》Tank thickness:4/6/8mm
》Power:220V/110V/battery


Working princinple

The Filtering Process
Filtering with media filters, also known as depth filtration, is done by filtering water through a thick layer of graded particles, called the filter bed. These particles can be sand, gravel or other granular materials. The filtration degree depends on the effective size of the bedding and the water velocity through the filter.
Raw water enters from the filter inlet (1) and percolates through the filter bed (2). Suspended materials come into contact and attach to the media particles. Clean water flows through the filtration nozzles (3) and out of the filter via the outlet valve (4).
The gradual dirt buildup in the filter bed causes an increase in the pressure differential across the filter and when it reaches its maximum design value, a cleaning process should be performed. In automatic media filter installations a pressure differential switch senses the pressure differential and when it reaches a preset value, the self cleaning process begins.
 

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The Cleaning Process
Cleaning is done by backwashing; pressurized water flows in reverse direction – from the nozzles upwards, causing suspension of the filter bed, thus releasing the suspended matter from the bedding. The dirt particles are then washed out of the filter through the back-flush valve. In automatic media filters installations the cleaning process is done by the system's controller. When the pressure differential switch senses that the differential pressure across the system reached a pre-set value, a signal is sent to the flushing controller and the self cleaning process begins.

   

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The Control System
CDFS supplies several control systems for its sand filters such as Electrical Control Boards, Programmable Logic Controllers (PLCs) for supporting any size of media filters installation.
 

Multi vessels sand filter system firgure

Multi-vessels.jpg


Sand filter specification sheet table

ModelVessels 
QTY
Max.flow 
(agri.)
Max.flow 
(indus.)
Min. pressureMax. pressureBackwashing
 flow 
Water in/out
(mm/inch)
DMF24-2-A230220.21.0 1580 / 3
DMF24-3-A345330.21.0 1980 / 3
DMF28-2-A260300.21.0 30100 / 4
DMF28-3-A390450.21.0 50100 / 4
DMF32-2-A275400.21.0 35100 / 4
DMF32-3-A3115600.21.0 50150 / 6
DMF36-2-A280700.21.0 40100 / 4
DMF36-3-A31201050.21.0 50150 / 6
DMF48-2-A21601000.21.0 80150 / 6
DMF48-3-A32401500.21.0 80200 / 8

   Remark:    1.  Agri -  agricultral irigation,     indus. -industrial.

                     2.  The flow is different when used for irrigation and industrial


Sand filter and self cleaning filter for irrigation

sand-filter-for-irrigation.jpg

Multi vessels auto sand filter dimensions


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ModelDLWH1H2H3h
(agri.)
h
(Indus.)
DMF24-2-A600133063013012151450400600
DMF24-3-A600203063013012151450400600
DMF28-2-A700152072014013051580400600
DMF28-3-A700232072014013051580400600
DMF32-2-A800172082014013451620400600
DMF32-3-A800262082017013951695400600
DMF36-2-A900192092014013851660400600
DMF36-3-A900292092017014401740400600
DMF48-2-A12002620122017015931925400600
DMF48-3-A12004020122020016482005400600

Remark: The agri.- agricultral, The indus- industrial.

            The flow is different when used for agricultral and industrial


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