The Shaft Seal for Kaeser Screw Compressors is a high-precision sealing component engineered to prevent oil leakage from the air-end while protecting the drive shaft from external contaminants. Designed specifically for the high rotational speeds and thermal demands of the Sigma Profile™ air-end, these seals typically utilize advanced PTFE (Teflon) or high-grade fluorocarbon (Viton) materials that maintain their elasticity and sealing integrity over thousands of operational hours. By ensuring a 100% oil-tight barrier between the internal lubrication circuit and the motor drive side, these genuine seals prevent environmental contamination and expensive oil loss. Using a genuine Kaeser shaft seal—often replaced alongside a matching wear sleeve—is critical for maintaining the internal pressure of the compressor and avoiding catastrophic air-end failure due to dry-running or bearing damage.