Automatic strainers are used in fine screens so that they do not get clogged up.


Fine screens are commonly used in various industries and processes to remove solid particles or debris from liquids. These screens typically have small openings or mesh sizes to ensure efficient filtration. However, the small openings can easily get clogged with solid particles, reducing the effectiveness of the screen. To prevent clogging and maintain the filtration efficiency, automatic strainers are employed.


Automatic strainers are mechanical devices designed to remove solid particles from a liquid stream. These strainers utilize a self-cleaning mechanism to continuously and automatically remove the accumulated solids from the screen surface. This allows the fine screen to operate efficiently without frequent manual cleaning or maintenance.


Automatic strainers typically consist of a perforated or mesh screen, a rotating cleaning mechanism, and a backwashing system. The liquid to be filtered enters the strainer through an inlet and passes through the fine screen. As the liquid flows through the screen, solid particles are trapped on the surface of the screen.

The key working principle of automatic strainers is as follows:
- The rotation of the cleaning mechanism continuously sweeps the screen surface, dislodging the trapped solids.
- The dislodged solids are then flushed out of the strainer through the backwashing system.
- The backwashing system uses a combination of pressure differentials, flow reversals, and/or mechanical actions to remove the solids.
- The cleaned liquid exits the strainer through an outlet.


- Continuous operation: Automatic strainers can operate continuously without interruption, providing uninterrupted filtration.
- Self-cleaning: The self-cleaning mechanism of automatic strainers eliminates the need for manual cleaning, reducing downtime and maintenance costs.
- High filtration efficiency: With the continuous removal of solids, automatic strainers maintain high filtration efficiency throughout the operation.
- Reduced pressure drop: By preventing the accumulation of solids, automatic strainers minimize pressure drop across the screen, optimizing the flow rate.
- Versatility: Automatic strainers can handle a wide range of liquid viscosities, temperatures, and solid loadings, making them suitable for various applications.


In summary, automatic strainers are used in fine screens to prevent clogging and maintain efficient filtration. These mechanical devices employ a self-cleaning mechanism to continuously remove the accumulated solids from the screen surface. The use of automatic strainers ensures uninterrupted operation, high filtration efficiency, and reduced maintenance requirements in fine screen applications.