diaphragm pump

 
 

A diaphragm pump is a roughing pump which works using the principle sketched below. The volume of the pump is cyclically expanded and compressed using a diaphragm. In combination with two valves at the entrance and exit of the paper, this gives rise to a pumping effect


                           


Its advantage is that it does not rely on oil-sealing, i.e. it is a dry pump.

 

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