Basic concept of sieve filters

Sieve filters are mechanical devices designed to separate solid particles suspended in a liquid using a mesh or sieve with specific openings. Its main function is to retain solids larger than the size of the sieve opening, allowing the passage of the filtered fluid. These filters are widely used in industries such as construction, water treatment, food, and chemical processes, where it is crucial to remove solid impurities to protect equipment or improve product quality.

The working principle of sieve filters is based on physical filtration, where the sieve acts as a barrier that intercepts unwanted particles. They can be static or automatic, depending on whether they require manual intervention for cleaning or have self-cleaning mechanisms. Selection of the sieve opening size is critical to ensure adequate filtration without affecting liquid flow rate.

Manual sieve filters

Manual sieve filters are those that require human intervention for their operation and maintenance, mainly for cleaning the sieve. They are composed of a housing that houses the sieve or filter mesh, and a simple system to dismantle and clean the filter element. These filters are ideal for applications with low solids volume or where maintenance frequency is low.

Its design is usually robust and easily accessible to ensure that cleaning can be carried out quickly and safely, minimizing downtime in industrial processes. However, its limitation is that the accumulation of solids can generate significant pressure losses if timely cleaning is not carried out.

Automatic sieve filters

Automatic screen filters incorporate motorized or hydraulic systems for self-cleaning of the screen, eliminating the need for frequent manual intervention. These systems may include brushes, scrapers, backwashes or water jets that allow the solids accumulated on the screen to be removed without interrupting the flow of the liquid.