Patent ID: 6827680
Filing Date: 2004-12-07
Classification: B04B

Abstract:
A centrifuge, comprising:a centrifugal drum including a drum part, a centrifuge chamber bottom, a drum cover, solid matter discharge openings in a jacket area of a drum bottom part, and a piston valve axially movably disposed in the drum bottom part and held in a closed position by springs supported at the drum bottom part, the piston valve being movable by a control medium introduced into an opening chamber between the piston valve and the centrifuge chamber bottom, which control medium can overcome the springs and open the solid matter discharge openings, and wherein the springs are made from an unalloyed spring steel and substantially encapsulated by sleeves made of corrosion resistant material, the sleeves projecting on one side into the piston valve and, on another side, into bores of a bottom area of the drum bottom part.