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US 12,398,724 B2Granted
Centrifugal pump for conveying media containing solids
AssigneeKSB SE & Co. KGaA
InventorsJuergen Kalb, Markus Pittroff, Frank Riedelbauch
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Abstract
A centrifugal pump has an open impeller conveying media containing solids with at least one blade that projects in the direction of an inflow. The surface of the open impeller is at least partially provided with a carbon layer, preferably a tetrahedral hydrogen-free amorphous carbon layer. A surface of an adjacent wear plate may also be coated with tetrahedral hydrogen-free amorphous carbon layer.
Claims14
A waste water centrifugal pump for conveying media containing solids, comprising:
- an open impeller having at least one vane which projects in a direction of an inflow, wherein
- a surface of the impeller is provided at least in part with a PVD or CVD, amorphous carbon layer,
- the waste water is sewage water,
- a thickness of the amorphous carbon layer is more than 0.5 μm and less than 18 μm,
- the open impeller is an open diagonal single-vane impeller which is provided with the carbon layer, and
- the amorphous carbon layer is directly in contact with an adhesion promoter layer composed of more than 90 wt %, chromium.
3 more elements
Dependencies are inferred from the claim text.