bubbles and collapsing of those bubbles at the ‘eye of the impeller’ and that is termed as cavitation.
The pressure in the suction line can drop due to serval reasons.
● The suction line has too many turns and bends (avoid that, talk to layout and piping engineers)
● Plugged strainer or filter in the suction line (ensure the line is clean, maintenance is necessary)
● Rusted Pipe results in friction losses (keep an eye on those and change if necessary)
● Low level in the suction vessel (make sure that it operates at operating set point or close to it)
● Damaged fittings over a period and so forth
