Turcon® VL Seal® for Oil & Gas Applications - Trelleborg

Turcon® VL Seal®

  • Tight leakage control
  • Hydrodynamic back pumping effect maximizes leakage control
  • Avoids the trapping of pressure between tandem seals or between seals and scrapers
  • Low friction due to a reduced contact area between seal and mating surface
  • Continuously lubricated
  • Long service life
  • Simple design
  • Uses standard size O-Ring as an energizer

The Turcon® VL Seal® was developed as the next generation unidirectional rod seal. The sealing mechanism of Turcon® VL Seal® is based on the hydrodynamic properties of the seal.

The specially formed seal edge has a steep contact pressure gradient on the high-pressure side and a shallow contact pressure gradient on the low-pressure side. This ensures that the fluid film adhering to the piston rod is returned to the high-pressure chamber on the return stroke of the rod. The micro-fluid layer that is carried out of the high-pressure chamber when the piston rod is extended is therefore prevented from causing leaks.

Important to the function of the Turcon® VL Seal® is the Trelleborg Sealing Solutions back pumping effect. This prevents pressure from being trapped between tandem seals or between seals and double-acting scrapers.

The return delivery property of the Turcon® VL Seal® prevents the build-up of the inter-stage pressure that is normally associated with tandem seal configurations. Inter-stage pressure depends on system pressure speed, stroke length and groove design.

The presence of hydraulic oil around the seal ensures a very long service life, as the seal will always be adequately lubricated.Turcon® VL Seal®

Typical Oil & Gas Applications Include:

Technical Data

Parameters Values

Operating Pressure

5,800 psi / 60 MPa
(10,000 psi / 69 MPa with Zurcon® Back-up Ring)


Up to 50 ft/s / 15.0 m/s with reciprocating movements

Temperature Range

-54 °C to +260 °C /
-65 °F to +500 °F
Dependent on elastomer


Mineral oil-based hydraulic fluids, flame-retardant hydraulic fluids, environmentally-safe hydraulic fluids (bio-oils), water and others, depending on the elastomer material