Piston seal Gleitef KQ

elastomerNBRbronze

Product overview
Gleitef KQ is a double-acting piston sealing element consisting of a PTFE sliding seal on the dynamic side combined with an X‑ring and an O‑ring as preload. It operates as an active seal: increasing system pressure raises the load on the sealing edges. PTFE compounds can be supplied filled with bronze or carbon graphite to improve compressive strength. O‑rings and X‑rings are available in various elastomer grades (NBR, FKM; other materials on request).

Applications

• Hydraulic cylinders
• Piston accumulators
• Presses
• Stabilisers
• Machine tools
• Media separation and positioning/holding cylinders (suitable for small diameters compared with Gleitef KX)

Fields of application (functional modes)

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

Main use
Piston sealing for media separation or for positioning/holding cylinders.

Materials
PTFE, PTFE with fillers (e.g. bronze, carbon graphite), elastomers (NBR, FKM). Other materials available on request.

Technical values

• Pressure: up to 40 MPa
• Speed: up to 2 m/s
• Temperature (material dependent): NBR: -30°C to +80°C; FKM: -20°C to +200°C
• Note: maximum values for pressure, speed and temperature are not simultaneously applicable and depend on material and media

Technical specifications

• Type: Double-acting piston sealing element
• Design: PTFE sliding seal + X‑ring (dynamic side) + O‑ring (preload)
• PTFE compound options: filled with bronze or carbon graphite to improve compressive strength
• Available elastomer options: NBR, FKM (selection affects temperature range)
• Primary applications: hydraulic cylinders, piston accumulators, presses, stabilisers, machine tools, media separation, positioning/holding cylinders
• Maximum pressure: up to 40 MPa
• Maximum speed: up to 2 m/s
• Temperature ranges: NBR: -30°C / +80°C; FKM: -20°C / +200°C (material dependent)