Piston seal Gleitef KX

elastomerNBRPTFE

Overview
Gleitef KX is a double-acting piston sealing element consisting of a PTFE dynamic seal with an X-ring on the dynamic sealing side and two O-rings as preload elements. It is an active sealing design: as system pressure increases, the load on the sealing edges increases. The product is designed for hydraulic cylinders, piston accumulators, presses, stabilizers and machine tools and is suitable for media separation and for positioning/holding cylinders where larger diameters are required compared to Gleitef KQ.

Fields of application

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

Main use
Piston sealing for media separation or for positioning and holding cylinders

Materials
PTFE for the sealing element (plain or filled with bronze or carbon graphite to improve compressive strength); O-rings and X-rings available in various elastomer materials

Technical values
Materials (selection)

• NBR
• FKM

Variant NBR

• Pressure: up to 40 MPa
• Temperature: -30°C to +80°C (depending on elastomer and media)
• Speed: up to 3 m/s

Variant FKM

• Pressure: up to 40 MPa
• Temperature: -20°C to +200°C (depending on elastomer and media)
• Speed: up to 3 m/s

Note
Maximum values for temperature, speed and pressure are not applicable simultaneously; actual limits depend on material selection and media.

Technical specifications

• Product type: double-acting sealing element
• Composition: PTFE dynamic seal (dynamic side with X-ring) + two O-rings as preload elements
• PTFE compound options: plain or filled with bronze or carbon graphite to improve compressive strength
• O-ring and X-ring: available in multiple elastomer materials (examples: NBR, FKM)
• Main applications: hydraulic cylinders, piston accumulators, presses, stabilizers, machine tools
• Application note: suitable for media separation and for positioning/holding cylinders with larger diameters compared to Gleitef KQ
• Pressure rating: up to 40 MPa (material and media dependent)
• Speed: up to 3 m/s
• Temperature ranges: NBR variant: -30°C to +80°C; FKM variant: -20°C to +200°C
• Active sealing behavior: sealing force on edges increases with system pressure