The magnetic filter can separate magnetic substances from nonmagnetic substances through the magnetic filtration system. Magnetic filters equip permanent magnets, which generate magnetic force, magnetic substances will be held by magnets but nonmagnetic substances will not, they pass through magnets because of gravity or pressure, then you get pure nonmagnetic substances. Magnetic filter is widely used in many areas, for example, the magnetic central heating filter is a common one used in water processing.