FIELD: separation of materials. SUBSTANCE: device consists of a housing with an opening for receiving a shaft to form a ring slot and circular groove made on the inner surface of the housing and having sucking out openings. The width of the ring slot and half width of the circular groove from the side of a contaminated spaces are the same or exceeds the value of the inertia free running of aerosol particles that are capable to overcome the ring slot. The circular groove are eccentric to the opening in the housing. EFFECT: improved design. 2 cl, 3 dwg
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