What problems can occur due to the different diameters at the inlet and outlet of fluorine-lined magnetic pumps?
Thread Content
Our company has purchased several fluorine-lined magnetic pumps of the CQB50-32-160 model. The imported pipes are made of fluorine-lined material; the pipes from the storage tank to the pump have a diameter of DN65, while the pipes connecting to the pump use reducers to change the diameter from DN65 to DN50. The diameter of these reducers is 25 mm. The outlet side also uses reducers to change the diameter from DN32 to DN50, with a diameter of 17 mm. Currently, bulging is occurring on the inside of the isolation sleeves. Please help us resolve this issue
May I ask which company’s lined magnetic pump your party has chosen? Are there any other questions? Please share it. We also want to buy some recently to use with dilute sulfuric acid.
The inlet narrowing can easily lead to cavitation, with effects similar to those of a lack of fluid. The impeller is bonded to the shaft and the sleeve.
Pipelines lined with PTFE generally cannot withstand negative pressure; high negative pressure may cause the PTFE lining to deform and bulge, or bulging can also occur if the PTFE lining is subjected to external compression. For pumps equipped with fluorocarbon-lined components, the piping is usually sized one size larger to ensure that its diameter is roughly consistent with that of the pump. It is preferable to use sprayed pipes rather than molded ones, as molded pipes are too thick and result in a reduced inner diameter.
The inlet flow is too low, causing cavitation and brief interruptions in fluid supply. Dry grinding occurs because the temperature inside the isolation sleeve is too high, causing the plastic to soften.
It is possible to appropriately raise the operating liquid level of the storage tank, which will result in much better operation for the pump. If you can tell me the saturated vapor pressure of the material and the installation height of the tank, I can calculate for you at what liquid level it would be more optimal.
The pump isn’t drawing in enough fluid; close the outlet valve and reduce the flow rate