Abstract: A filter for and a method of removal of magnetic particles and treating a liquid with a magnetic field in which a liquid flows through a filter containing permanent magnetic balls tightly packed together so that there is no straight flow path through the filter but only around these magnetic balls. Increased mixing and turbulence of flow coupled with strong intensity of a magnetic field across the direction of the flow promotes better attraction and retention of magnetic particles on the magnetic balls. The filter is particularly useful as a fuel or oil filter for an internal combustion engine. Other advantageous applications include water treatment filters. The filter is capable of removing magnetic particles for an extended period of time without clogging.

Abstract: A filter for removal of magnetic particles in which a liquid flows through a first compartment containing magnetic balls tightly packed together so that there is no direct flow path but only around these magnetic balls. Increased mixing of flow coupled with strong intensity of a magnetic field across the flow promotes better attraction and retention of the magnetic particles on the magnetic balls. The second compartment contains commonly known porous materials of known porosity to remove smaller non-magnetic particles. The filter is particularly useful as a fuel or oil filter for an internal combustion engine. In one embodiment, the magnetic portion is made removable and individually replaceable to extend the life of the filter. The filter is capable of removing magnetic particles for an extended period of time without clogging.