Disc pumps have been specially developed for applications outside the usual pump spectrum. Disc pumps are used whenever abrasive particles or large solids are being pumped that would cause excessive wear or a lack of reliability in other pump technologies.
Disc Pumps
Disk pumps are based on a unique pumping principle in which the pumped medium is moved solely by its own internal frictional forces. Inside the pump is an assembly of opposing disks. Rotation sets the liquid between the disks in motion without blades, gears or similar components interacting with the liquid.
A boundary layer of liquid molecules collects on the discs and moves with them as they rotate. Since there is no relative movement between the discs and the boundary layer, abrasion by solids is eliminated and a virtually maintenance-free system is created. The internal liquid is set in motion solely by the boundary layer, which, due to the viscous flow resistance, pulls the remaining pumped medium along with it. The centrifugal effect then generates the flow towards the pump outlet.
