Patent ID: 8333337
Filing Date: 2012-12-18
Classification: B05C,F16K

Abstract:
1. A valve unit for interrupting or releasing a pressurized flow of a medium flowing along a hollow duct, comprising: at least one section along the hollow duct including at least one first magnet unit which generates a first magnetic field and which is axially movable at least along a pressurized flow direction of the medium through the hollow duct; a second magnet unit which generates a second magnetic field interacting with the first magnetic field so that a magnetic force mutually axially attracting the magnet units acts between the at least one first and the second magnet units; a mechanical stop in the hollow duct, against which the at least one first magnet unit is drivable by a retention force which is generated by the magnetic force, and the at least one first magnet unit assumes an axial position, exclusively at which the retention force axially moves the at least one first magnet unit in the hollow duct to seal the hollow duct to be fluid-tight, while the medium loads the at least one first magnet unit to be pressurized axially against a direction of action of the retention force; a unit for generating a variable force acting against the retention force on the at least one first magnet unit to control opening and sealing of the hollow duct; and a spacer located in the hollow duct between the at least one first magnetic unit and the second magnetic unit and at a position downstream from the second magnetic unit during the pressurized flow, the spacer permitting flow of the medium in the hollow duct around or through the spacer and with the at least one first and the second magnetic units being separated by an axial spacing during the pressurized flow of the medium, and wherein the retention force at the axial spacing between the at least one first and the second magnetic units is less than the retention force when the at least one first magnet unit seals the hollow duct.