Alfa Laval Corporate Ab

Klas Hilding

Peter Thorwid

Sven-Åke Nilsson

Jouko Juhani Pitkämäki

Tomas Deurell

Anders Ekström

Jouko PITKÄMÄKI

Sven-Ake Nilsson

Anders EKSTRÖM

A separation disc for a centrifugal separator is adapted to be included in a stack of separation discs inside a centrifugal rotor for separating a fluid mixture. The separation disc has a truncated conical shape with an inner surface and an outer surface and a plurality of spacing members extending from at least one of the inner surface and the outer surface. The spot-formed spacing members are for providing interspaces between mutually adjacent separation discs in a stack of separation discs. The separation disc further includes at least one elongated rib extending from the inner surface to a height (h) that is less than the height (H) to which the plurality of spacing members extend. Further, at least one elongated rib extends from first position on the inner surface to a second position on the inner surface. The second position is at a radial distance that is larger than the radial distance of the first position, and the relation between the height of the elongated ribs (h) and the spacing members (H) are h/H&#x3e;0.7.

Separation disc for a centrifugal separator

A seal assembly for providing a seal between a first zone and a second zone includes a rotatable sealing member including a first sealing ring, a stationary sealing member including a second sealing ring and a device for bringing the first and second sealing rings into engagement with each other. The first and second sealing rings are arranged so that a double contact seal having at least one chamber arranged at a radial plane is formed upon engagement between the first and second sealing rings. The seal assembly further includes at least one fluid connection to the chamber. A centrifugal separator includes such a seal assembly.

Seal assembly for a centrifugal separator

A centrifugal separator for separation of at least two components of a fluid mixture of different densities includes a centrifuge rotor with a sliding bowl bottom movable between a closed position, in which the peripheral ports are closed, and an open position, in which the peripheral ports are open, an inlet channel for supplying hydraulic fluid to a closing chamber between the sliding bowl bottom and the rotor casing in order to hold the sliding bowl bottom in the closed position. The centrifugal separator includes at least one hermetic seal at a second end, other than the first end, of a hollow spindle and the inlet channel for supplying hydraulic fluid to the closing chamber extends through the hollow spindle and is arranged such that the hydraulic fluid is in thermal contact with the at least one hermetic seal when the hydraulic fluid is supplied to the closing chamber.

Centrifugal separator having an intermittent discharge system with hydraulically operated sliding bowl bottom

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Älta, Sweden

Klas Hilding