Rotary claw compressors are used in remediation applications requiring relatively low pressures, such as air sparging. Rotary claw technology is similar to rotary lobe technology in that there are two non-contact, counter-rotating rotors within a non-lubricated casing. The difference lies in the unique claw shapes of the rotors, which creates internal compression. As the rotors pass the compressor inlet, the area between the rotors expands, drawing air into the compressor. Each claw captures a portion of that air and traps it against the compressor casing. When the rotors reach a certain point in their rotation, the two portions of air are recombined and compressed due to the meshing of the claws. At this point of internal compression, the air is forced through the outlet of the compressor. Since each claw is symmetrical, every rotation of the claws results in two complete expansion and compression cycles. As air is being drawn in at the inlet due to expansion, another cycle of air is being compressed and discharged through the outlet.
Rotary claw compressors are capable of pressures up to 30 PSIG and require very little maintenance due to their non-contact, dry compression. However, dry compression leads to high noise levels and high discharge temperatures.
When selecting a rotary claw compressor, the required flow rate and pressure are the most important factors, and the electrical classification of the motor should also be considered.
MLE Equipment uses rotary claw compressors manufactured by Busch Vacuum Technics and Elmo Rietschle. Please see the provided specification sheets and manuals for more detailed information on rotary claw compressors.
