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The Simplicity of the Rotary Claw Vacuum Pump
The Simplicity of the Rotary Claw Vacuum Pump
December 08, 2017

Dry type pumps have become the preferred choice of equipment for many industrial settings. Amongst the most valued is the rotary claw vacuum pump, thanks its simple and cost-effective design. It is an increasingly common investment for many industries, because it is easy to understand, and undoubtedly works very well for the purposes of benefiting production.

The pump essentially works through the operation of two claws that spin rapidly in opposite directions without ever striking each other or the container. The end goal of these operations, of course, is to create a partial vacuum that can be utilized for medical, mechanical, industrial, or a wide variety of other purposes.


A rotary claw vacuum pump works through four main steps:


  • The first rotation inside the pump allows the gas or fluid to enter the chamber, which serves to fill the space between first claw and the inner stator.
  • The second rotation transfers the material to the second claw, where compression occurs as the claws rotate at an increasing pace.
  • The continuous rotating movement of the inner claws compresses the gases further, and creates a substantial difference in pressure in different sides of the pump. The continuous compression increases the pressure on the outlet side and lowers the pressure on the inlet side of the rotary claw vacuum pump.
  • The compressed air is discharged, leaving behind a vacuum within the pump. Typically, a silencer is applied between the compressed air and the outside of the vacuum, as the operating principle of this device means that this can be a fairly loud process.


The simple design of the rotary claw vacuum pump is both effective and efficient. Each rotary motion increases pressure and allows for constant motion for the material to move through the chambers. This form of air compression is very reliable, and these devices have seen use in mechanical and medial industries, in aircrafts, and in refining, and many more besides.

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