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Invitation to the 25th China Environmental Protection Exhibition
Invitation to the 25th China Environmental Protection Exhibition, April 18-20, 2024, Shanghai New International Expo Center, Booth N4·J69. We sincerely invite you to visit.
15
2024
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04
What are the reasons why a screw pump is not sucking liquid?
When screw pumps are used to pump liquids with low liquid levels, they may occasionally fail to pump liquid. The reason for this is often misunderstood due to a lack of understanding of the liquid suction principle of screw pumps. The main reasons why a screw pump may fail to pump liquid are as follows:
17
2019
01
Inspection quality standard for screw pump shafts
Using the screw thread top as a reference, inspect the wear condition of the shaft neck and screw surface. There must be no scratches, and the screw surface roughness must not be less than 1.6. The surface roughness of the thread top must not be less than 0.8. The ellipticity of the shaft neck must not exceed 1/2000 of the diameter.
