FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy and chemical industry. Proposed device comprises container 3 and reciprocation drive 9, sealing elements represent a deformed torus made of elastic material and filled pressurised fluid or gas. Container 3 represents a hollow cylinder stopped on both faces and having holes 5, 6 to load/unload granular medium 4 (1st version). Container may represent open vessel arranged between cylindrical guides on drive rod with guide disc distributors arranged with spacing that ensures tightness over outer outline when arranged in deformed torus fitted in working chamber casing (2nd version), or when placed in deformed elastic tori arranged in working chamber casing hole to make transition zone there between (3rd version).
EFFECT: higher reliability.
3 cl, 6 dwg
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