Patent ID: 8257240

Claim:
A compressible disc unit comprising: a plurality of separating discs which when, in a compressed state, are removably mountable in a rotor of a centrifugal separator and wherein the rotor with the compressible disc unit mounted therein is rotatable about an axis of rotation, support means, a pressure means, the separating discs are positioned between the support means and the pressure means; central control means having guide surfaces which movably abut the separating discs and control the radial and polar position of the separating discs, and at least one compression means operable to compress the support and pressure means towards one another and being disposed between the control means and at least one of the support means and the pressure means; the pressure means and the central control means are moveably positioned relative to the support means; and the pressure means and the central control means are operable to maintain the abutment between the guide surfaces and the separating discs during compression of the separating discs from an uncompressed position to a compressed position.