1. Before the start of the pipeline pump, water filling is insufficient or the vacuum pump is not pumping the air in the pump. To extend the water filling time, increase water filling, continue to use vacuum pump pumping. If water is still dissatisfied with the charge, air pumping is not the net, it is necessary to consider checking water inlet pipe is leakage, valve is rust, and stuffing for leaks. Then, to check out the problem, were repaired or replaced.
2. The assembly head of the pipeline pump more than the rated head of the pump. Appropriate to reduce the pump mounting height (refers to the pump shaft centerline wells move to the vertical distance between the water level) or shorten the length of the suction pipe, due to increase of water pipe diameter (general suction pipe diameter than water pump inlet diameter high level) to reduce the assembly pump head, high pump suction height.
3. The water pipe leakage of the pipeline pump, resulting in tight seal, water filling dissatisfaction, the air is not clean. Illumination method for inspection, if the pipe wall leakage, repair blocked strict; if leaks at interfaces, with a wrench to tighten or replacement of the leather pad.
4. Pipe pump impeller reversal. Can the direction of rotation through the rotation direction of the machine to change the pump change. If the motor as the driving force, you should adjust the motor wiring phase sequence to change the rotation of the motor; if it is used in internal combustion engine as a driving force, it should adopt the cross belt drive transmission approach for adjustment.
5. Pipe pump water immersion depth of water immersion is not enough.
First, the depth of the pipeline pump suction orifice immersed in water was measured, if immersed in shallow should be taken to reduce the pump mounting height or increase the centrifugal pump suction pipe length measures, ensure the pump suction mouth immersed below the surface of the water depth in 0.5 M
6. The water inlet of the pump impeller or pipeline blockage. First stop and check out the specific blockage position, and then clear the blockage. Finally, according to the blockage (silt, sundries, etc.) species can be respectively take washing (suggested by air compressors and other equipment), set the trash rack and other measures to improve water quality, prevent the blockage phenomenon from happening again.
