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Vacuum assist helps increase filtration rate, but overzealous use can lead to problems. In our filter trolleys, vacuum is created by an AODD diaphragm pump. Our pumps create so much vacuum that a safety valve needs to be installed so the main trolley tube does not implode under pressure.
Though diaphragm pumps are made to operate dry and create suction, this situation decreases diaphragm life. If the vacuum is allowed to increase uncontrollably by revving the pump when a clog exists, the diaphragms tend to rupture. As vacuum increases, diaphragms blow up like a balloon in each stroke. Eventually, they are stretched so much that they rupture. If no solution is flowing to your pump, increasing pump speed should not be your first reaction to solve the problem.
The excess vacuum also creates other problems like torn paper or leaks through the gasket.
If you are having vacuum issues, always keep the pump at a slow pace. We recommend running the pump 25-40% power when running dry.
Here are some things to check:
To diagnose vacuum issues, we suggest you run your pump with room temperature solvent in a circular circuit, thus putting the pump discharge back into the trolley. Run without cloth or paper.
99% of the time this solves al problems, but if you still have issues you should first read the user manual and the included SOP. If you need further help, please reach out and we can help.