Xi 'an Keshang Fluid Equipment Engineering Co. LTD

Specializing in the production of titanium pump, zirconium pump, nickel pump, Hastelloy pump and other chemical pump science and technology enterprises


Possible causes

Aspiration failure

1.The pump has not been filled before operation;2.The suction pipe of the pump is not full of fluid;3.The net suction head is not enough;4.There is too much air or gas in the fluid

5.There is no flowing air cavity in the suction pipe;6.The air leaks into the suction pipe;7.The air enters the pump through the stuffing box or mechanical seal;8.There is air in the source of the sealing fluid

9.The water seal pipe is blocked;10.The packing ring in the stuffing box is not installed properly;11.The suction pipe is not completely immersed in the liquid;12.There is eddy current at the suction inlet

13.When the pump is running,the suction valve is closed or partially closed;14.The suction filter is blocked;15.The suction pipe is blocked;16.The friction resistance of the suction pipe is too large

17.Impeller clogging


Other hydraulic problems

18.Wrong rotation direction;20.The instrument is not calibrated;21.The impeller diameter is smaller than the specified;22.The impeller diameter is larger than the specified value;

23.When the pump is running,the discharge valve is closed,and the bypass is not opened;24.Run the pump under the minimum flow;25.The friction loss of the system is greater than the calculated value

26.The maximum pressure head of the system is greater than the design head of the pump;27.The maximum pressure head of the system is less than the design head of the pump;28.The pump is operated in an excessive flow state(for a specific low-speed pump)

29.Operate the pump at too low flow rate(for specific high-speed pump);30.The specific gravity of the fluid does not conform to the design conditions;31.The viscosity of the fluid does not conform to the design conditions

32.The internal operating clearance is too large due to wear;33.The leakage pipeline of the balancing device is blocked;


Mechanical fault generality

34.Poor alignment;35.Insufficient rigidity of foundation;36.Missing foundation bolts;37.