A centrifugal compressor is disclosed. The centrifugal compressor comprises a first duct configured to receive a process gas, an impeller connected to the first duct and configured to compress the process gas, wherein the impeller has an outer surface, a first seal comprising, a first plurality of swirl brakes configured to have a tooth shape to reduce the inlet seal swirl of a flow of the process gas at an entrance to the first seal, wherein each swirl brake is disposed at a leading edge of the first seal and is configured to have a gap between the first plurality of swirl brakes and the outer surface of the impeller seal. A seal including a plurality of swirl brakes for reducing an inlet swirl and a method of manufacturing such a seal are disclosed.
https://app.acclaimip.com/pdf/ZqFFNEIoFL5boUVRpygUsjCmswIzapYZRGcdwWc/US9057383B2
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