SUBJECT: The pump works for a while and then loses suction 10-12

A couple of things you must keep in mind when troubleshooting centrifugal pump problems:

Cavitation is a main cause of losing pump suction, but remember that there are several different types of cavitation:

Each of these cavitations has been addressed in other papers in this site In this paper we will be looking at only the intermittent loss of suction fluid. You will be looking at several possibilities:

Now we will take a look at each of these possibilities in detail:

A re-occurring restriction in the suction piping that may or may not be causing a cavitation problem within the pump.

Intermittent incidents that cause cavitation problems

A repetitive need for an increase in the pumps capacity.

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