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Diaphragm pumps are designed with a diaphragm built-in that moves up and down. The up movement is going to create a suction that is going to pull liquids through the inlet. The downward motion is going to push them through the outlet.
These types of pumps can handle liquids of varying viscosities--liquids with low levels of friction will move through this pump easily; liquids with higher levels of friction will also pass through this pump easily. Liquids with higher viscosities can include water with mud or sludge in it.
Welch® vacuum pumps use a dry, oil-free membrane--diaphragm--technology to deliver faster pumping dynamics that support filtration, evaporation, drying, degassing, impregnation, and other rough vacuum applications.
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