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How Drinking Water Filtration Works

Filtration systems are used most often in-home water treatment to remove sediment or iron, manganese, or sulfur particles. Filtration can also remove some bacteria from water. In mechanical filtration systems, water passes through a medium such as cloth or sand. Particles become trapped on the surface of or within the medium. The pore size, or space between media granules or fibers, determines what size particles a filter can remove.

Filters are rated according to the smallest particle they can trap. The filter opening size to use depends upon the material to be removed by the filter. A smaller size will satisfy removal requirements but will require more frequent cleaning or replacement of the filter. When these filters are used to pre-treat water for other water treatment devices, follow the manufacturer’s recommendations.

Surface or screen filters remove the particles at or very near the filter surface. They function very much like a screen; particles of a certain size and larger are retained at the surface while smaller ones move through the openings.

Depth filters have a thick filter medium. Particles are retained throughout the thick filter mat. Depth filters have a gradation in the size of the filter media so that the largest particles are held at or near the filter surface, while progressively smaller particles are captured deeper in the filter where the filter media becomes smaller.


Our factory can produce the wedge wire screen filter element and stainless steel wire mesh filter media, which can used in water treatment, drink, paper& pulp, etc industries.

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