Dry gas seal (DGS), as a typical kind of non-contacting mechanical seal, meets satisfactorily the requirements of low leakage rate, wear-free operation, and low power consumption for industrial centrifugal compressors, pumps, fans and other turbo machines with medium speed. Dry gas seal technology has now been extended into the area of low-speed services, including mixers and agitators used in food and pharmaceutical areas, which always require absolute purity of product by eliminating wear or unwanted seal lubricant leaking into the process.
