4, the flow is set lower than the design requirements. Pump blockage. Seal ring wear too much. Insufficient number of revolutions. Wash pumps and tubes. Replace sealing ring. Increase the number of revolutions of the pump shaft 5, the power consumption of the pump is too large. Packing gland too tight. Functional heat grave material impeller wear. Increased water pump set. Relax packing gland. Replace the impeller. Increase the outlet pipe to reduce the flow of spiritual resistance. 6, multi-stage pump, pump internal sound unusual, no water pump. Too much traffic. Suction tube resistance is too large. In the suction of the air; incorporation. The suction fluid temperature is too isolated. Increase in the outlet pipe to reduce the flow resistance of the spirit. Check the pump suction pipe. Check the bottom valve. Reduce suction lift. Plugging leakage Department. Reduce suction lift. To much oil leaking along the shaft and drift *, D80-30X3 multi-stage pump, too little overheated bearings and also burned accident! During pump operation the bearing temperature at around 60 degrees maximum, D80-30X6 multistage pumps generally run 85 degrees, if necessary to find the cause of high (if there are impurities, oil is black, is water) and in a timely manner deal with! D80-30X6 multistage pumps, multistage pumps, multistage centrifugal pump Co. pump provided by the Shijiazhuang-school. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) strong, credible, and other industries in other Shijiazhuang, Hebei accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shijiazhuang-faction pump into the brilliant and you work for a better future!