A, fault phenomenon: pump vibration and noise.

B:why

(1) of the pump shaft and motor shaft centerline.

(2) shaft bending.

(3) pump cavitation.

(4) rotational part and fixed part friction losses.

(5) the rotational part out of balance.

(6) bearing wear.

(7) or pump with sundry jam.

(8) down the inlet valve.

C, the processing methods:

(1) in a correction.

(2) change the new shaft.

(3) to consult the manufacturer.

(4) maintenance pump or improve the usage.

(5) check the reason, trying to get rid.

(6) replace the bearing.

(7) check, blowdown.

(8) open the inlet valve, outlet valve adjustment.