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Hunan Dawning Filter System Technology Co., Ltd

Committed water filtration system developing and producing since 2002



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  • sand media filter
  • sand media filter
  • sand media filter

Two vessels sand media filter

Explore the pivotal role of sand media filters in water treatment, enhancing water quality and sustainability through efficient filtration processes.



Sand Media Filters: A Key Player in Water Treatment Processes   

Sand media filters are integral components in the water treatment industry, playing a crucial role in purifying and maintaining water quality. Their significance in various water treatment processes can be outlined as follows:

1. Removal of Suspended Particles: Sand media filters are highly effective in removing suspended particles from water. They work by allowing water to pass through layers of sand, which trap and remove particles, thus clarifying the water.

2. Versatility in Applications: These filters are versatile and can be used in a range of settings, from municipal water treatment plants to industrial and agricultural applications. They are particularly effective in treating groundwater, surface water, and wastewater.

3. Sustainable Water Treatment: Sand media filters are a sustainable option for water treatment. They require minimal maintenance and are energy-efficient, making them a cost-effective solution for long-term water purification.

4. Enhancing Water Quality: By removing contaminants and impurities, sand media filters significantly enhance the quality of water. This is essential for ensuring safe drinking water and for meeting the water quality standards required in various industrial processes.

5. Compatibility with Other Treatment Methods: These filters can be used in conjunction with other water treatment methods, such as chemical treatment and UV disinfection, to achieve comprehensive water purification.

How the Sand Media Filter Work?

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.

Product features

  • 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 16”-96”) 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

Selection of data table


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 system and other industries. 

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

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

5. Filtrations for: aquaculture, swimming pool, and water park and so on. 

Sand Media Filter Related supporting products

In the realm of water treatment, sand media filters are essential for ensuring the purity and safety of water. To enhance their effectiveness, a comprehensive range of supporting components and equipment is crucial. Our focus on providing complete solutions for sand media filters encompasses various aspects:

Filter Valves: We offer a variety of filter valves that are specifically designed to complement sand media filters. These valves ensure precise control and efficient operation of the filtration process.

Filter Pumps: Our range of filter pumps is selected to match the requirements of sand media filters. They provide consistent and reliable water flow, which is crucial for optimal filtration.

Piping and Mechanical Equipment: The piping and mechanical equipment we provide are engineered to integrate seamlessly with sand media filters. They are constructed to withstand various operational demands and ensure the longevity of the entire system.

Applications in Renewable Energy Industry:

  • Solar Energy Systems: Our sand media filters are well-suited for use in solar energy systems. They provide essential water treatment capabilities that are vital for the maintenance and efficiency of these systems.

  • Remote Areas without Electricity: The versatility of our sand media filters also extends to areas without electricity. They offer effective water treatment solutions that are crucial in remote and off-grid locations.

In conclusion, our comprehensive support for sand media filters in water treatment systems is designed to enhance efficiency, sustainability, and reliability. By providing high-quality valves, pumps, piping, and equipment, we ensure that our customers have access to a complete solution for their water treatment needs.


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.

On-site installation

  • Sand filter installation

    Sand filter installation

  • Sand filter installation

    Sand filter installation

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