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FOS develops and manufactures rotary shaft seals, PTFE lip seals, hydraulic seals, large-diameter seals, shaft repair sleeves and customized rubber-to-metal components. Our products can be adapted to specific requirements involving speed, temperature, pressure, media compatibility, contamination and service life.
Metal-Encased PTFE Rotary Lip Seals

Metal-Encased PTFE Rotary Lip Seals

Low-Friction Sealing for High-Speed, High-Temperature and Aggressive-Media Applications

Metal-encased PTFE rotary lip seals combine a rigid metal case with a precision-formed PTFE sealing lip. They are designed for applications that exceed the speed, temperature or media-resistance capabilities of conventional elastomeric oil seals.

Single-lip, dual-lip and customized multi-lip configurations are available according to sealing direction, pressure, lubrication and contamination requirements.

Available PTFE Compounds

Graphite-filled PTFE
Glass-fiber-filled PTFE
Carbon-fiber-filled PTFE
MoS₂-filled PTFE
Other application-specific PTFE compounds

Typical Applications

Industrial and collaborative robots
Robotic joints and actuators
Gearboxes and speed reducers
Electric motors and e-mobility systems
Hydraulic pumps
Compressors and process equipment
High-speed industrial machinery