What is a Basket Strainer?

In modern industrial production and domestic water systems, filtration equipment is like an "invisible guardian", silently shouldering the important task of intercepting impurities and protecting the safe operation of equipment. Among the many filters, basket strainers have become one of the core equipment in the fields of petrochemical, food and pharmaceutical, environmental protection and water treatment due to their simple and efficient structure and stable performance. This article will give you a comprehensive understanding of basket strainers from the dimensions of principle, structure, application scenarios, etc.

1. Work Principle of Basket Strainer

Basket strainer is a mechanical filtering device that intercepts solid particles in the fluid through a built-in mesh filter basket. Its core principle is to use the high-density pore structure of the filter basket to trap impurities inside the filter basket when liquid or gas flows through, thereby ensuring the cleanliness and safety of downstream pipelines, valves, pumps and other equipment.

2. The Structure of Basket Strainer

The basket strainer is mainly composed of the following part: the shell is usually made of plastic, carbon steel, stainless steel and other materials, which are resistant to high pressure and corrosion. The filter basket is the core filter component, made of stainless steel wire mesh or perforated plate, used to intercept impurities. The upper cover is removable for easy cleaning or replacement of the filter basket. The seal ensures that the filter is leak-free under high pressure. Some models of the sewage outlet are equipped with a sewage valve for regular slag discharge.

3. Performance Advantages of Basket Strainers

● Excellent Flow Performance

This equipment adopts innovative fluid dynamics design and is equipped with a super large filtration area structure. By optimizing the flow channel layout and expanding the effective filtration area, its unique flow guide system can achieve uniform distribution of fluid, avoid local blockage, and fully meet the strict requirements of modern industry for efficient filtration systems.

● Accurate Filtration Effect

The equipment provides a full range of filtration precision options from 20 mesh to 200 mesh, using multi-layer composite filter technology that can be personalized according to different industry needs. Each filter screen undergoes precision laser cutting and strict quality inspection to ensure that the aperture uniformity and mechanical strength reach industry-leading levels, meeting filtering scenarios with different precision requirements.

● Convenient Maintenance Features

The innovative and developed quick opening mechanism adopts a patented lever principle, which can be quickly opened by a single person, greatly saving maintenance time compared to traditional bolt fixing methods. The modular design of the filtering component supports quick replacement. The equipment is equipped with an intelligent warning system that can monitor the status of the filter screen in real time and prompt maintenance cycles, greatly reducing the risk of unplanned downtime.

4. Application Area of Basket Strainers

● Petrochemical Industry

Basket strainers are mainly used for precision filtration of crude oil, refined oil, and various chemical liquids. In the process of oil extraction, refining, and transportation, filters can effectively intercept impurities such as solid particles, rust, and welding slag in the oil. This not only protects downstream key equipment such as pumps, valves, and flow meters from wear and blockage, but also significantly extends the service life of the equipment and reduces maintenance costs.

● Water Treatment Industry

Basket strainer is the core filtration equipment in water treatment systems, widely used in pre-treatment of water plants and industrial circulating water systems. In the field of municipal water supply, it can effectively remove suspended solids such as sediment and algae from raw water; For industrial circulating cooling water, it can prevent scaling of heat exchangers. Its unique detachable basket structure design not only ensures the quality of the effluent, but also facilitates quick cleaning and maintenance, significantly reducing operational energy consumption.

● Food and Pharmaceutical Industry

This field has strict hygiene requirements for filtration equipment. The sanitary basket strainer is made of 316L stainless steel material, and the inner surface is treated with electrolytic polishing (Ra ≤ 0.8 μm). In beverage production, crystalline impurities in syrup can be filtered; Energy saving and removal of malt residue in beer brewing process; Used for separating casein particles during dairy processing; The pharmaceutical industry is widely used in key processes such as injection filtration and purification of biologics. The specially designed quick opening structure facilitates CIP online cleaning.

● Electricity and Energy Industry

In thermal power plants, basket strainers are important protective devices for boiler feed water systems, which can effectively intercept impurities such as iron oxide particles and scale in pipelines, and prevent erosion damage to key parts such as turbine blades. The auxiliary cooling water system of nuclear power plants also extensively uses double basket strainers to ensure uninterrupted water supply. The field of new energy, such as medium filtration for geothermal power generation and fuel pretreatment for biomass power plants, also requires such equipment. High pressure resistant design and anti-corrosion treatment enable it to adapt to various harsh working conditions.

5. Basket Strainer Selection Guide

● Filter Accuracy Matching

The filtering accuracy is the primary consideration when choosing a basket strainer. In practical applications, it is necessary to select the mesh size of the filter screen based on the particle size and processing requirements of impurities in the fluid medium. Usually, a 20-100 mesh filter can be selected for coarse filtration to remove larger particles; It is recommended to choose 100-400 mesh for medium precision filtering, which is suitable for most industrial scenarios; For high-precision filtration with high requirements, ultrafine filters with a mesh size of 400 or more can be selected.

● Material Science Selection

The choice of basket strainer material directly affects the service life and safety of the equipment. 304 stainless steel has become the preferred material for most conventional working conditions due to its excellent corrosion resistance and economy. For special corrosive environments with strong acids, strong alkalis, or high salinity, it is recommended to use 316L stainless steel material. When selecting materials, special consideration should be given to factors such as medium composition, temperature, concentration, etc. If necessary, material corrosion resistance tests should be conducted.

● Pressure Level Selection

The pressure level is a key parameter to ensure the safe operation of the basket strainer. When selecting, it is necessary to accurately grasp the maximum working pressure of the system and consider possible pressure fluctuation factors. Common pressure levels include 1.0MPa, 1.6MPa, 2.5MPa, etc., which are suitable for systems with different pressure requirements. Among them, 1.0MPa is suitable for low-pressure circulation systems; 1.6MPa is the most common choice in industrial applications; High voltage systems should be rated at 2.5MPa or above.

● Connection Method Selection

We offer multiple connection methods, including flanges, threads, and butt welding, to meet the interface requirements of different pipeline systems. Flange connection is easy to install and disassemble, threaded connection is suitable for small-diameter pipelines, and butt welding connection ensures high-strength sealing. Each method has undergone rigorous testing to ensure reliability and compatibility, meeting the diverse needs of industries such as chemical, energy, and more.

Basket strainers have become important equipment for industrial fluid processing due to their advantages of high efficiency filtration, easy maintenance, and long life. Whether it is petrochemical, water treatment, or food and medicine industry, it can provide reliable filtration solutions. If you are looking for high-quality basket filters, welcome to contact us. We will provide you with professional selection and customization services to ensure that your production process is smoother and more efficient.