Piston seal Gleitef KW

O-ringelastomerNBR

Product overview
Gleitef KW is a double-acting sealing element composed of a TPU (thermoplastic polyurethane) sealing ring combined with an O-ring as a preload element. It is an active sealing system: as system pressure increases, sealing load on the edges increases. The specially profiled geometry prevents blow-by during double-sided pressurization.

Applications

• Hydraulic cylinders
• Agricultural machinery
• Lifting equipment
• Machine tools

Materials and general properties
TPU offers excellent abrasion resistance and performs well under limited lubrication. The standard TPU compound is produced with a hardness of 93–96 Shore A and is available in several colors. O-rings are available in standard elastomer materials (NBR, FKM, others on request).

Main use

• Double-acting piston seal for hydraulic cylinders
• Prevents blow-by under double-sided pressurization

Technical values

• Materials (variants): TPU seal combined with an O-ring preload element; O-ring materials: NBR, FKM (other materials selectable)
• Pressure: up to 40 MPa (material dependent)
• Temperature (material dependent): NBR: -30°C to +80°C; FKM/other: -20°C to +200°C; TPU max. +100°C
• Speed: up to 0.5 m/s

Additional characteristics

• Active sealing behavior — sealing force increases with system pressure
• Designed geometry to prevent blow-by under double-sided pressurization
• High abrasion resistance (TPU)
• Suitable for applications with limited lubrication

Characteristics / technical specifications

• Denomination: Gleitef KW
• Type: Double-acting piston seal (dynamic)
• Main materials: Polyurethane (TPU) for the seal; elastomers for O-ring (NBR, FKM selectable)
• Standard TPU hardness: 93–96 Shore A
• Pressure rating: up to 40 MPa (material dependent)
• Temperature ranges: NBR: -30°C to +80°C; FKM/other: -20°C to +200°C; TPU max. +100°C
• Maximum sliding speed: up to 0.5 m/s
• Fields of application: Hydraulic cylinders, agricultural machinery, lifting equipment, machine tools
• Function: Prevents blow-by under double-sided pressurization; active sealing behavior
• O-ring preload: available in standard O-ring materials