A, fault phenomenon: pump lose A liquid.

B, reason:

(1) inlet line or with air in the pump body;

(2) the import or export of lateral pipe valves close;

(3) use the head higher than the maximum head of pump;

(4) the pump suction pipe leakage;

(5) error of impeller rotation direction;

(6) on the suction height is too high,

(7) the suction pipe passing small or debris jam;

(8) speed.

C, the processing methods:

(1) filled with liquid, eliminate the air;

(2) open valve;

(3) change the pump head high;

(4) put an end to import side leakage;

(5) the correct motor steering;

(6) reduce the pump installation height, increasing inlet pressure;

(7) increase suction pipe diameter, and eliminate the clog;

(8) the motor speed.