Can you identify and avoid cavitation? Cavitation is the formation and collapse of gaseous cavities in a liquid which causes severe wear or eroding of the metal wear surfaces in the pump.
The most obvious sign of cavitation is a hammering noise. The noise can be either consistent or intermittent depending upon the degree of cavitation and damage to the pump. Vibration of the pump and system will also be noticeable as the pump is starved of fluid. Eventually flow and pressure will decrease.
Check your system for these conditions which may contribute to, or directly cause, cavitation:
Inadequate inlet line size
Insufficient inlet flow or excessive suction
Excessive inlet line length
Rigid inlet plumbing
Too many elbows and/or fittings
Excessive temperature build-up or pumped fluid
Air leak in inlet plumbing
Agitation in supply reservoir
Inadequate increase of inlet flow for fluids of greater specific gravity
Inadequate increase of inlet flow for higher temperature fluids
Clogged inlet filters.
It is important to carefully check your system during assembly and operation to avoid the serious damage that can be caused by cavitation.