Filtrierer

Filtrierer (German for filter) is a term used in German-language technical literature to denote a device or unit intended to remove suspended solids from a liquid or gas by forcing the flow through a porous barrier or selective medium. In English, the term is usually translated as filter, filtration unit, or filtering device. The primary use of a Filtrierer is to protect equipment, improve product quality, or render a fluid suitable for downstream processes.

A Filtrierer usually consists of a housing with an interior chamber that contains a filter element. The element can be replaceable or cleanable and is made from media such as cellulose, polyester, glass fiber, ceramic, or polymer membranes. Fluid enters through an inlet, passes through the media, and exits as filtered fluid. Particles are retained either on the surface or within the depth of the media, depending on the design. Filtration can occur by sieving, interception, diffusion, or adsorption. Depth filters capture contaminants throughout the media; surface and membrane filters provide a barrier at or near the outlet.

Common types include cartridge filters, bag filters, pleated filters, and depth filters for liquids, as well as coalescing and membrane filters for gases. Filter media are selected according to pore size, chemical compatibility, temperature, and flow rate. Some systems employ backwashing or cleaning-in-place to extend service life.

Filtrierer devices are used across industries, including drinking water and process water treatment, food and beverage production, pharmaceuticals, chemical processing, oil and gas, and air filtration in HVAC and clean environments. They are also used in laboratory equipment and automotive filtration systems.