The Atlas Copco Compressor Oil Seal (often referred to as a shaft seal) is a high-precision mechanical component designed to provide a leak-proof barrier at the point where the drive shaft exits the air-end. Engineered specifically for the high rotational speeds and thermal demands of GA, GX, and GR series rotary screw compressors, these seals prevent the loss of expensive lubricating oil while blocking ambient dust and contaminants from entering the compression chamber. Genuine Atlas Copco seals are typically manufactured from PTFE (Teflon) with a stainless steel housing, ensuring they maintain their elasticity and sealing integrity even under the extreme pressures and chemical stress of synthetic lubricants.