Automatic Backflushing Sand Filtration System for Industrial/Irrigation

• Type: Water Filter
• Media: Quartz Sand
• Tanks Quantities: 1-10
• Tank Size: 16-96"
• Housing: Carbon Steel/Stainless Steel
• Working Pressure(Max.): 10 Bar
• Backwash Pressure(Min.): 2 Bar
• Pressure Loss: 0.2-0.5 Bar
• Back Time: 20-200s
• Application: Industrial/Irrigation
• Control Way: Differential Pressure/Time/Manual
• Transport Package: Corrugated Paper Plus Plastic Film
• Specification: 28"
• Trademark: CDFS
• Origin: China
• HS Code: 8421219990
• Production Capacity: 2600 Sets Per Year

Product Description

Technical requirements

Min. pressure: 0.15Mpa
 Max. pressure: 1.0Mpa 
 Working temperature: <65ºC 
 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.   
 


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.

 

Singel vessel sand filter specification table

Model	Vessels QTY	Flow(Agri.)	Flow(Indus.)	Min.pressure	Max.pressure	Backwash flow	Water in/out	Filtration area
DMF24-1-A	1	15	11	0.2	1.0	15	DN50	0.3
DMF28-1-A	1	30	15	0.2	1.0	30	DN80	0.4
DMF32-1-A	1	38	20	0.2	1.0	38	DN100	0.5
DMF36-1-A	1	40	35	0.2	1.0	40	DN100	0.64
DMF48-1-A	1	80	50	0.2	1.0	80	DN100	1.2

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

            The flow is different when used for agricultral and industrial
 

Multi vessels auto sand filter dimensions

Model	D	L	W	H1	H2	H3	H4
DMF24-1-A	600	850	830	400	650	1150	1600
DMF28-1-A	700	925	920	410	680	1200	1670
DMF32-1-A	800	925	1020	450	720	1240	1710
DMF36-1-A	900	925	1120	500	770	1280	1750
DMF48-1-A	1200	1200	1500	630	1345	1510	1985

Cases picture



Company introduction

      Based in China, Hunan Dawning is water filter system company developing,producing and selling over past 16 years.

The main products include automatic back washing filter, self cleaning filter,sand media filter, disc filter, valves and accessories,dosing system,etc. We could provide efficient,stable solutions for industrial,irrigation and municipal water treatment.

They are widely used in construction, steel, electricity, petrochemical, metallurgical, pharmaceutical, paper, automotive, hotels, municipal and other major industries.
We have exported to hundreds of countries and regions such as America, Canada, Chile, Australia, Italy, UK, Singapore,Philippines,Malaysia,Indonesia, Dubai, etc.

We owned 9 patents and adopted the ISO9001 and CE. 

 

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