Frame filter or filter press - a device for filtering liquids, cleaning liquids from particles or inclusions.
Filter paper is installed between the frames, it is clamped between the frames for tightness and the liquid is pumped. Particle filtration occurs depending on the pore size of the paper. Designation in micrometers from 45 micrometers to 0.25 micrometers*.
* Micrometer (Russian designation: μm, international: μm; from Greek μικρός "small" + μέτρον "measure, measurement") is a submultiple unit of length in the International System of Units (SI). Equal to one millionth of a meter (10−6 meters or 10−3 millimeters): 1 µm=0.001 mm=0.0001 cm=0.000001 m.