Piston seal Gleitef KD

O-ringelastomerNBR

Overview Gleitef KD is a double-acting sealing element composed of a PTFE seal and an O-ring as preload element. It is an active sealing element: as system pressure increases, the force on the sealing edge increases. Gleitef KD requires minimal installation space and meets the requirements of dynamic O-ring seals. It is designed for applications with limited space and lower pressures. The PTFE compound can be supplied with a special filler or with carbon graphite to improve compressive strength. O-rings are available in a variety of materials.

Recommended applications Suitable for hydraulic and pneumatic cylinders, fittings, presses and machine tools.

Fields of application

• Static
• Dynamic
• Single acting
• Double acting
• Linear
• Rotating (inactive)
• Oscillating

Main use double acting piston sealing for O-ring groove design

Materials elastomers, PTFE, PTFE with filling material (special filler or carbon graphite). O-ring compounds available on request.

Technical values

• Materials (variants): NBR, FKM (selection available)
• Pressure: depending on PTFE material and media — up to 25 MPa
• Temperature (variant dependent): variant with NBR: -30°C to +80°C (material dependent); variant with FKM: -20°C to +200°C (material dependent)
• Speed: up to 10 m/s
• Note: maximum temperature, speed and pressure values are not simultaneously applicable and vary depending on material and media

Characteristics / technical specifications

• Type: double-acting sealing element
• Components: PTFE seal + O-ring as preload element
• Main application: piston sealing in O-ring groove designs
• Typical use cases: hydraulic and pneumatic cylinders, fittings, presses, machine tools
• Materials: elastomers (e.g. NBR, FKM), PTFE, PTFE with filling (special filler or carbon graphite)
• Pressure capability: up to 25 MPa (material and media dependent)
• Temperature range: variant-dependent (example ranges: -30°C / +80°C and -20°C / +200°C)
• Maximum speed: up to 10 m/s
• Design advantage: smallest installation space for applications with limited space and lower pressures