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Hunan Dawning Filter System Technology Co., Ltd

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  • Sand filter irrigation
  • sand filter for irrigation
  • sand filter for drip irrigation
  • irrigation sand filter

Sand filter irrigation media filter for drip system

In irrigation system, sand filter using three-dimensional filtration of sand, as primary filtration to deal with organic and inorganic impurities in water. Sand filters should be selected once the contents of organic impurities in the water is over 10mg/h.



In irrigation systems, sand filters use three-dimensional filtration of sand, as primary filtration to deal with organic and inorganic impurities in water. Sand filters should be selected once the contents of organic impurities in the water are over 10mg/h.

Features of sand filter irrigation:

1. High flow rate with low pressure loss.

2. Modularized setting, compact, with less piping, reducing the investment.

3. One or multi-parallel filtration units are available according to the requirement of the irrigation project.

How the sand filter work?

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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.

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Product features

The Features and Specification of Sand Filter Irrigation

  • Complete filtration solutions; Custom designed,manual or automatic backwash systems,

  • complete with manifolds, valves and controllers

  • Modularity and flexibility, wide range of vessel types and sizes(diameter 20”-48”) suitable for many filtration applications

  • High quality corrosion resistance vessels, inside and outside spray coating.

  • High efficiency; Advanced design for perfect water distribution during filtering and backwashing

  • All filters are rated to 1.0 Mpa.The water inlet pressure should be 0.2Mpa(Min.)

  • Various connection types, meeting all international standards.

  • Meets ISO 9001 standards

Product application 

1、Industrial process water filtering, such as nozzle and heat exchange station water protections.

2、Industrial circulating water filtering, ——steel, metallurgy, paper making, heat exchanger, electric power, petrochemical, food, air conditioning systems, and other industries. 

3、Raw water treatment filtering, ——surface water, river lake and seawater, etc

4、Irrigation filtering—— farmland, park, municipal, and golf course water filtration.

5. Filtration for aquaculture, swimming pools, water parks, and so on. 

Selection of data table

The model selecting of sand filter irrigation

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The Advantages of CDFS Irrigation Sand Filter


Irrigation Sand Filter Components


Sand Filter and disc filter ferlitization sytem Irrigation Cases


FAQ about automatic backwash sand filter

Q: Where is your factory?
A:Changsha city, Hunan province, China?

Q: How about the delivery time?
A: Usually 7 days for standard model.

Q:Does the filter operated automatically?
A:Yes. Automatic backwash by differential pressure/ time.

Q:Can you accept OEM?
A:Yes. We could do OEM and put your logo.

Q: Do you have a certification?
A: Yes. We have ISO / CE certificate and certificate of patent

Q: Can we choose the color of filter housing?
A: Yes. Blue/green/red or others.

Q:How is the installation of filter?
A: Shipping in skid. Just connect the flanges of water in/out and drain out.

Customer Feedback About CDFS sand filter




On-site installation

  • Sand filter irrigation

    Sand filter irrigation

  • Sand filter for drip irrigation

    Sand filter for drip irrigation

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