SEALING UNIT Russian patent published in 2002 - IPC

FIELD: units handling liquid media, petroleum products, low-aggressive liquids at low dispersivity of from 0.1 to 1.00 mm. SUBSTANCE: sealing unit includes flexible non- reinforced seal with friction circular member arranged relative to it. Flexible member has circular projections over its butts which are used for vacuum isolation from surrounding medium. Arranged inside flexible member are axially movable circular parts located coaxially; their butts are engageable with internal butts of flexible member and with butts of spring on other side. Spring is locked against radial displacement of lugs of parts located coaxially. Clearance between spring coils is meant for galling of surface of butt of graphitized ring which is engageable with concentric circular projections of flexible member on one side. EFFECT: enhanced reliability. 7 dwg