The Working Principle of a Roots Blower Pump

Roots blower is a type of pump that is also sometimes referred to as booster pump or intermediate stage vacuum pump. It is a type of dry pump used for gas transfers. Being a dry pump, water or oil is never introduced in the pump gas. The pump makes use of mechanical means to transfer the gas. The roots blower pump is typically mounted on the inlet of some primary or backing pump like rotary vane, screw pump or claw pump. These pumps enhance or boost the overall performance of a primary pump thereby improving the pump down speed greatly. In fact, it has been found that the combination of a primary pump with the roots blower can lead to an approximate increase of 7 times in the pumping speed along with a 10-fold increase in the pressure compared to what is normally managed by a solo operating primary pump.

The roots blower functions as a unit of valve-less displacement compressor that does not have any internal compression. As the compression chamber gets into contact with outlet port, the compressed air smoothly flows back inside the housing directly from pressure side. Therefore, further compression occurs when the total volume of compression chamber decreases further along with continued rotation. The compression is carried out against a full counter-pressure. When roots blower is used in some high or super high vacuum system, it is located right between primary pump and another unit of diffusion high vacuum pump.

The distinct benefits of using roots blower have led many companies over the years to come forward and create their own versions. If you are looking to get a roots blower unit for your operations, you can certainly get it from a well known manufacturer. The roots blower pumps may also vary in their capacity from one model to another.