Piston seal Gleitef KF

O-ringelastomerNBR

Product overview
Gleitef KF is a double-acting sealing element which consists of a PTFE seal and an O-ring as preload element. Gleitef SF is an active sealing element and as the system pressure increases, the force on the sealing edge also increases. Gleitef KF requires a much small installation space than Gleitef KG and is used for applications with limited space and lower pressures. This is particularly suitable for hydraulic and pneumatic cylinders, fittings, presses and machine tools. The PTFE compound is filled with a special filler or with carbon graphite to improve the compressive strength. Further compounds upon request. O-rings are available in a variety of different materials.

Fields of application

• static
• dynamic
• single acting
• double acting
• linear
• rotating (inactive)
• oscillating

Main use
piston sealing for hydraulic and pneumatic cylinders with limited space

Materials
elastomers, PTFE, PTFE with filling material

Technical values
Materials (variants available): NBR, FKM; PTFE compounds (with special filler or carbon graphite) to improve compressive strength.

Variant technical data (variant: NBR)
Pressure: depending on PTFE-material and media — up to 25 MPa
Temperature: -30°C / +80°C (material dependent)
Speed: up to 10 m/s

Variant technical data (variant: FKM)
Pressure: depending on PTFE-material and media — up to 25 MPa
Temperature: -20°C / +200°C (material dependent)
Speed: up to 10 m/s

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

Characteristics / technical specifications

• Type: double-acting piston sealing element (PTFE seal + O-ring preload)
• Main applications: hydraulic and pneumatic cylinders, fittings, presses, machine tools
• Installation space: smaller than Gleitef KG (suitable for limited space)
• PTFE compounds: standard PTFE, PTFE with special filler, PTFE with carbon graphite (improved compressive strength)
• O-ring options: available in a variety of elastomer materials (e.g. NBR, FKM)
• Pressure rating: up to 25 MPa (material and media dependent)
• Temperature ranges: variant dependent — NBR variant: -30°C to +80°C; FKM variant: -20°C to +200°C
• Maximum sliding speed: up to 10 m/s
• Operating modes: static, dynamic, single-acting, double-acting, linear, oscillating (rotating shown as inactive)
• Compatibility: depends on chosen PTFE compound and O-ring material (select per media and temperature)