Dynamic seal Gleitef SF

O-ringelastomerNBR

Product description
Gleitef SF is a double-acting sealing element composed of a PTFE seal combined with an O-ring serving as a preload element. It is an active sealing element: as system pressure increases, the sealing edge loading also increases. Gleitef SF requires significantly less installation space than Gleitef SG and is intended for applications with limited space and lower pressures.

Features

• Double-acting rod seal design (PTFE seal + O-ring preload)
• Active sealing behaviour: sealing load increases with system pressure
• Compact design requiring smaller installation space than Gleitef SG
• PTFE compound variants: PTFE filled with a special filler or with carbon graphite to improve compressive strength
• O-rings available in a variety of elastomer materials
• Suitable for hydraulic and pneumatic cylinders, fittings, presses and machine tools

Fields of application

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

Main use
Double acting rod seal for hydraulic and pneumatic cylinders.

Materials
Elastomers, PTFE, PTFE with filling material. PTFE compounds can be produced with special fillers or carbon graphite to increase compressive strength. O-ring materials available in various elastomers.

Technical values

• Variant (NBR): Pressure up to 25 MPa; Temperature range -30°C / +80°C (material dependent); Speed up to 10 m/s
• Variant (FKM): Pressure up to 25 MPa; Temperature range -20°C / +200°C (material dependent); Speed up to 10 m/s

Notes
Maximum values for temperature, speed and pressure are not simultaneously applicable; values vary depending on material and operating media.

Characteristics / technical specifications

• Denomination: Gleitef SF
• Type: Double-acting rod seal (PTFE sealing element with O-ring preload)
• Components: PTFE sealing element + O-ring preload
• PTFE fillers: special filler or carbon graphite to improve compressive strength
• O-ring materials: various elastomers (e.g. NBR, FKM)
• Primary use: Hydraulic and pneumatic cylinders, fittings, presses, machine tools
• Pressure (both variants): up to 25 MPa
• Temperature (NBR variant): -30°C to +80°C (material dependent)
• Temperature (FKM variant): -20°C to +200°C (material dependent)
• Maximum speed: up to 10 m/s
• Design advantage: reduced installation space compared to Gleitef SG