Wear describes a multitude of material losses at the surface of solid bodies, which is caused by mechanical means and, as such, is a form of frictional wear.

In principle, wear can be differentiated in four key mechanisms:

  • Adhesive wear: Insufficient lubrication leads to the creation of gliding, resulting in material being sheared off.
  • Abrasive wear: When hard particles of a lubricant enter the surface layer of a component, they create micro-cutting and material loss in the form of abrasion.
  • Surface spalling: Changing or pulsating mechanical tensions lead to spalling of the surface of a component.
  • Tribooxidation: Interlayers, which are created from chemical reactions, are subsequently destroyed by the movement of the components.

An important form of wear in pump systems is cavitation, which is created by vapor bubbles in liquids.

In addition to the best possible extensive reduction of wear, design measures attempt to reduce the effects of unavoidable wear by carefully planning and designing wear parts. These can be replaced very easily in most cases.

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