Product Introduction
The backwash filter has a simple appearance and a compact and reasonable structure. It usually takes the form of a cylinder or a cuboid, making it easy to integrate into various industrial and civil pipeline systems. Its outer shell is mostly made of high-quality materials such as stainless steel and carbon steel, possessing good corrosion resistance and sturdiness, which can effectively resist the influence of the complex external environment. The core internal components are a high-precision filter screen and a backwash device. The filter screen has a fine pore structure that can accurately intercept impurity particles in the fluid. The backwash device can perform reverse flushing on the filter screen regularly or as needed to remove the attached impurities and maintain the good filtering performance of the filter screen. It is widely used in many fields where fluid purity is required.
Technical Specifications
(I) Filtration Precision
The filtration precision has a wide range, varying from several micrometers to several hundred micrometers. Common ones include 50 micrometers, 100 micrometers, and 200 micrometers. It can be flexibly selected according to factors such as the nature of the actual fluid to be processed and the particle size of the impurities contained therein to achieve the desired filtering effect.
(II) Flow Rate Range
It can adapt to different scales of flow rate requirements, ranging from a few cubic meters per hour to thousands of cubic meters per hour. Whether it is a small local circulation system or the fluid transportation in large-scale industrial production processes, it can match the corresponding flow rate processing capacity.
(III) Working Pressure
Generally, it can withstand a working pressure between 0.1MPa and 1.6MPa. Some specially designed products can withstand higher pressures, enabling them to operate stably in pipeline environments of different pressure levels and ensuring the smooth progress of the filtering work.
(IV) Backwash Time Interval
It can be adjusted according to specific usage scenarios and the amount of impurities in the fluid. It can be as short as once every few minutes or as long as once every few hours or even dozens of hours. Through reasonable settings, the cleanliness of the filter screen can be ensured while avoiding energy waste and equipment wear caused by overly frequent backwashing.

Working Process
When the fluid containing impurities enters the backwash filter, under the guidance of the internal flow guide components, the fluid flows evenly towards the filter screen. When the fluid passes through the filter screen, the impurity particles are intercepted on the surface of the filter screen because they cannot pass through the pores of the filter screen, while the clean fluid smoothly passes through the filter screen and is discharged from the outlet of the filter, realizing the initial filtering process.
As the filtration continues, the impurities on the surface of the filter screen keep accumulating. When the preset amount of impurity attachment is reached or after a preset time period, the backwash device starts to operate. The backwash device injects high-pressure fluid (such as water, gas or a mixture of both) into the other side of the filter screen (the side opposite to the direction of fluid flow during filtration), causing the high-pressure fluid to generate a powerful reverse impact force to wash off the impurities on the surface of the filter screen. These washed-off impurities are discharged out of the filter along the sewage pipeline. After the backwash is completed, the filter screen returns to a good filtering state and can continue to efficiently filter the incoming fluid. This cycle repeats to ensure that the fluid is continuously purified.

Product Features
(I) High-Efficiency Filtration Ability
With the help of the high-precision filter screen, the backwash filter has an excellent interception effect on impurities of different particle sizes. It can effectively remove suspended matter, granular impurities and other substances in the fluid, ensuring that the discharged fluid reaches a relatively high purity and meets the strict requirements of downstream equipment or processes on fluid quality.
(II) Automatic Backwash Function
Its automatic backwash mechanism is a highlight. It does not require manual monitoring and operation at all times. It can automatically perform backwash according to preset conditions, which not only saves a lot of labor costs but also can promptly restore the filtering performance of the filter screen, ensuring that the filter can continuously and stably work for a long time and reducing problems such as a decline in filtering efficiency caused by the blockage of the filter screen.
(III) Stable and Reliable Operation
The overall structural design is scientific and reasonable, and the components are closely coordinated. Within the normal working pressure and flow range, as long as the installation and maintenance are carried out in accordance with the specifications, it can operate stably for a long time without being prone to failures, providing a reliable guarantee for fluid filtration work and ensuring that the entire production or use process is not affected.
(IV) Simple and Convenient Operation
The operation interface is simple and clear. Operators only need to undergo simple training to master basic operations such as starting, stopping, and setting backwash parameters of the equipment. The daily maintenance work mainly focuses on checking the operating status of the equipment and regularly checking the wear condition of the filter screen. It does not require complex professional skills and cumbersome operation procedures, which is convenient for enterprises and users to manage and maintain.
(V) Wide Adaptability
It can adapt to various fluids with different properties, such as water, oil, and chemical solutions, and can function normally in different temperature and pressure environments. Whether in ordinary working conditions such as normal temperature and normal pressure or in special working conditions such as high temperature and high pressure, it can work effectively with strong versatility and is applicable to different application scenarios in numerous industries.
Application Fields
(I) Industrial Field
In the chemical industry, many chemical reactions require the use of pure raw materials and solvents. The backwash filter can filter various chemical raw material liquids, intermediate reaction products, and finished products to remove impurities, prevent impurities from affecting the reaction process and product quality, and also avoid the blockage of pipelines and equipment by impurities, ensuring the smooth progress of chemical production. In the power industry, for fluids such as cooling water and lubricating oil of generator sets, this filter can effectively filter out impurities, maintain a good heat dissipation effect of the cooling system and the normal operation of the lubrication system, extend the service life of the equipment, and improve the power generation efficiency.
(II) Municipal Field
In urban water supply systems, the source water often contains impurities such as sediment and rust. The backwash filter can be used as a pre-filtration device to preliminarily filter the raw water, reduce the burden of subsequent water treatment processes, improve the water supply quality, and ensure the safety and hygiene of residents’ water use. In sewage treatment, it can filter large particle impurities in sewage to facilitate the subsequent biochemical treatment, in-depth treatment and other links, helping to improve the overall effect of sewage treatment.
(III) Agricultural Field
In agricultural irrigation, the water source may carry impurities such as sediment and fragments of weeds. The backwash filter can filter these impurities to prevent them from blocking irrigation nozzles and pipelines, ensure the normal operation of the irrigation system, make the irrigation water evenly sprayed on crops, improve the irrigation efficiency, and also help protect crops from damage caused by impurities.
(IV) Food and Beverage Industry
The production of food and beverages has extremely high requirements for water quality. Whether it is the preparation of drinking water or the process water used in the production of various beverages and foods, it must be ensured to be pure and free of impurities. The backwash filter can perform in-depth filtration on these waters to remove tiny particles, microorganisms and other impurities in the water to ensure that it meets the hygiene standards of food production and guarantees product quality and food safety.
(V) Pharmaceutical Industry
In all aspects of drug production, from the dissolution and preparation of raw materials to the filling of drugs, no impurities are allowed to be mixed in. The backwash filter can strictly filter pharmaceutical water and some liquid raw materials to ensure the purity and quality safety of drugs and meet the requirements of the strict Good Manufacturing Practice for Pharmaceutical Products.
Conclusion
The backwash filter plays an indispensable role in the field of fluid filtration with its ingenious structural design, reasonable technical parameters, efficient working principle, excellent performance characteristics and wide application fields. It can not only meet the strict requirements of different industries for fluid purity, ensure the normal operation of production, life and other aspects, but also reduce the use cost and management difficulty by virtue of its advantages such as simple operation and stable operation. With the continuous development of science and technology and the increasing requirements of various industries for product quality and environmental protection, the backwash filter will surely be deeply applied in more fields and continue to contribute to creating a clean and high-quality fluid environment.If you are interested or have any questions, please contact us.
