scroll pump

 
 

A scroll pump is a type of roughing pump which works using the principle below:





The rest gas of the recipient enters the opening between two archimedean spirals, one fixed and one rotating. Due to the rotation, the volume between the spirals is expanded and eventually sealed off and transported away.


Scroll pumps have the advantage of not using oil for sealing, i.e. they are dry pumps.

 

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