Strainers in pipeline are fitted to safeguard pipeline equipment from harm caused by undesired particles. Unwanted debris may consist of dirt or other foreign particles that have found their way into the process fluid. Basket strainers are typically used in horizontal pipes and when high flow capacity is required.
These strainers are put upstream of equipment such as pumps, control valves, and traps to prevent potentially corrosive or destructive debris from entering the system. They can be used singly or in series to increase filtering. They may have a single chamber (basic strainers) or several chambers (multiplex strainers).
Mesh Sizing
Each strainer has a mesh-lined basket to filter and collect undesirable particles. Mesh size should be determined by work function rather than system size. Choosing a mesh with too small apertures may result in more frequent clogged lines, but a mesh with much wider openings may allow more undesired debris to travel through the pipeline and equipment. Ideally, you’ll want to select a mesh with perforations that are somewhat smaller than the smallest particle you need to filter out.
The number of openings in one linear inch of screen is used to calculate mesh size. A 16-mesh screen, for example, has 16 apertures per inch, whereas a 100-mesh screen has 100 openings. Higher numbers can so strain out tiny particles with a finer weave. For quality and endurance, the baskets are often composed of stainless steel.
When the filter is turned on, the filtered water enters the strainer basket through the input, runs through the filter panel, and exits through the process flow outlet into the desired pipe. Water contaminants that are in the form of particles or solids become lodged in the basket filter screen. With this constant flow, progressively more particles are captured and the filtering speed slows down.
The filter hole would also continue to get smaller and smaller while the sewage was being conveyed; this caused a pressure difference between the input and the outflow. The differential pressure sensor sends an electrical signal to the controller when the difference between the inlet and outlet pressures is greater than the predetermined value, and the controller then starts the drive motor rotating the shaft through the transmitting element.
The blowing port is opened concurrently, and debris is discharged from the blowing port. The system returns to its initial filtering state as the filter screen is cleaned by blowdown, the differential pressure drops to its lowest value, and the system resumes normal operation.
A casing, several filter elements, a backwashing mechanism, a differential pressure regulator, etc. make up the filter. During use, liquid enters the strainer’s lower chamber through the intake and exits through the diaphragm hole into the inner chamber of the straining element. It is a cutting-edge, practical, and user-friendly automatic filtration system.
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