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:
|Operating Pressure||5,800 psi / 60 MPa|
(10,000 psi / 69 MPa with Zurcon® Back-up Ring)
|Speed||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
|Media||Mineral oil-based hydraulic fluids, flame-retardant hydraulic fluids, environmentally-safe hydraulic fluids (bio-oils), water and others, depending on the elastomer material|