Hydraulic Sealing Products

Lionsele® U2 - for rods & glands

Lionsele® U2 is a compact U-profiled rod/gland seal manufactured in high-performance polyurethane. Its asymmetrical design ensures sealing integrity when cylinder rod/gland deflections occur.

In operation, the secondary sealing lip traps fluid behind the primary sealing lip and serves to increase lubrication. This prevents dry running, thus reducing the risk of stick-slip action. Seal life is significantly increased by the optimised fluid film conditions created beneath the primary sealing lip.

Moreover, the secondary sealing lip helps to exclude contamination from the primary sealing lip, further promoting seal life.

Special features

  • High mechanical strength polyurethane provides excellent wear resistance.
  • Secondary sealing lip optimises fluid film conditions to increase seal life and reduce plant downtime.
  • Easy to fit.
  • Low maintenance costs.

Typical applications
Rod and ram seal for hydraulic cylinders on general duty systems, including mobile hydraulics, injection moulding machines, and many other industrial applications.

Operating capabilities

  • Maximum operating pressure: 42MPa (6092psi).
  • Temperature range: -30°C to +100°C (-22°F to +212°F).
  • Maximum surface speed: 0.5m/s (98.4psi).

Materials of construction
Precision moulded in wear-resistant polyurethane (AU/EU).

Media capabilities
Suitable for use with most mineral-based hydraulic fluids at up to 100°C (212°F). Also resistant to air and most lubricating oils and greases. Where fire-resistant fluids of the water/oil emulsion or water/glycol types are used, please consult our Technical Support Team for advice on temperature limits.

How supplied
To suit BS ISO 5597 - Short (L1) and Medium (L2) axial length series, and BS ISO 6020-2 housings. Other sizes can be manufactured to order. Fitting instructions are supplied with every seal.

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