Overview

Basket filters are used on oil or other liquid pipelines to filter debris in the pipeline. The filter hole area is 2-3 times larger than the cross-sectional area of the pipe, far exceeding the filtering area of Y-type and T-type filters. The filter precision is relatively high among filters. The mesh structure is different from other filter meshes, and it is named basket filter because its shape resembles a basket.

Basket filters mainly consist of the inlet/outlet pipe, shell, filter basket, flange, flange cover, and fasteners. Installed on pipelines, they remove larger solid impurities from the fluid, allowing machinery and equipment (including compressors, pumps, etc.) and instruments to operate normally, stabilizing the process and ensuring safe production. Filters are small devices that remove small amounts of solid particles from liquids, protecting compressors, pumps, instruments, and other equipment. When fluid passes through the filter basket with a specified mesh, impurities are blocked while clean fluid exits through the filter outlet. For cleaning, the removable filter basket can be taken out, cleaned, and reinstalled, making maintenance very convenient. They are widely used in petroleum, chemical, pharmaceutical, food, environmental protection, and other industries. When installed in series at the pump inlet or other parts of the system pipeline, they can extend the service life of pumps and other equipment and ensure the safety of the entire system.

The safety of the entire system.

Working Principle

During pipeline installation, other debris may enter the pipeline, and raw materials in production also contain impurities. When liquid passes through the filter, impurities are collected in the filter mesh. At a certain point, through pressure relief hole pressure is released to facilitate easy opening. Shell cover Cleaning Filter mesh This is sufficient, and the shell can be cleaned through the residue discharge port.

1. Inlet and outlet diameter ：

In principle, the inlet and outlet diameter of the filter should not be smaller than the inlet diameter of the matched pump, generally consistent with the inlet pipeline diameter.

2. Nominal pressure ：

Determine the filter pressure rating according to the highest possible pressure in the filter pipeline.

3. Selection of mesh size:

Mainly consider the particle size of impurities to be intercepted, based on the medium flow process requirements. The particle sizes that various mesh specifications can intercept are shown in the table "Filter Mesh Specifications."

■ Scope of application

1. Weakly corrosive materials in chemical and petrochemical production, such as water, ammonia, oil products, hydrocarbons, etc.

2. Corrosive materials in chemical production, such as caustic soda, concentrated and dilute sulfuric acid, carbonic acid, acetic acid, ester acid, etc.

3. Low-temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen, and various refrigerants.

4. Materials with sanitary requirements in light industry, food, and pharmaceutical production, such as beer, beverages, dairy products, grain slurry, and medical supplies.

5. Various special process high-efficiency filters, etc.

■ Stainless steel mesh technical parameters

■ Comprehensive technical parameters

Flange standards HG GB HGJ JB ANSI JIS DIN BS NF

■ Coarse filter pressure curve

Note: If customers require other materials, please specify when ordering.

■ Pressure Rating

Note: If customers require other pressure ratings, please specify when ordering.

Note: If customers choose configured flanges, please specify when ordering.

■ Connection Types and Codes

Note: If customers require other connection types, please specify when ordering.

■ Maintenance and Care

1. The core part of the filter is the filter element, which consists of the filter frame and stainless steel wire mesh. The stainless steel wire mesh is a consumable part and needs special protection;

2. After the filter has been in operation for a period of time, impurities will accumulate inside the filter element, causing an increase in pressure drop and a decrease in flow rate. The impurities inside the filter element need to be cleaned in time;

3. When cleaning impurities, pay special attention to avoid deformation or damage to the stainless steel wire mesh on the filter element. Otherwise, a damaged filter element will cause the purity of the filtered medium to fail to meet design requirements, and equipment such as compressors, pumps, and instruments may be damaged;

4. If deformation or damage to the stainless steel wire mesh is found, it must be replaced immediately.

■ Pipeline Installation Diagram

 Dirty water enters from the filter inlet, first passing through the coarse filter screen to remove larger particles, then reaching the fine filter screen. During filtration, the fine filter screen gradually accumulates dirt and impurities from the water, forming a filter impurity layer. Because the impurity layer accumulates on the inside of the fine filter screen, a pressure difference forms on the inside and outside of the fine filter screen. When the pressure difference of the self-cleaning filter reaches the preset value, a switch signal is sent to the control box PLC system to start a cleaning cycle. Cleaning process: The cleaning mechanism of the fully automatic negative pressure suction filter is a stainless steel spiral up-and-down moving suction scanner. It is hollow in structure, with several suction nozzles vertically distributed at certain distances along its axis. The inside of the suction scanner communicates with the 3” drain valve. When the drain valve opens, the pressure difference between the internal water pressure of the filter and the external atmospheric pressure generates strong suction at each suction nozzle. At each suction nozzle, water flows rapidly from outside to inside in reverse, washing impurities attached to the inner wall of the filter screen into the suction nozzle, through the hollow shaft of the suction scanner, then discharged through the drain valve, completing the cleaning process which takes about 30-60 seconds. At this time, the pressure difference returns to normal, the cleaning process ends, and filtration resumes. During cleaning, the system continues to flow.