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.
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