FIELD: aircraft industry. SUBSTANCE: filtration member with outer filtering surface in liquid medium is purified by extruding liquid through filtration member in direction opposite to filtration. Simultaneously it is subjected to action of ultrasonic oscillations, that form cavitations near filtration member. Purified filtration member is electrically insulated from equipment. In the case electrical potential is created on it due to electrization of filtration member during dielectric liquid extrusion through it. EFFECT: method is used in aircraft industry. 1 dwg
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