Based on the groundbreaking and well-proven Turcon® VL Seal®, this new generation seal offers enhanced sealing efficiency, easier installation, and even greater reliability. Extensive testing proves its outstanding ‘zero’ leakage performance, to extend service life and minimize planned maintenance.
The Turcon® VL Seal® II extends actuator service life. In addition, negating the need for drain lines and with a profile that allows smaller hardware design, the seal can make a significant contribution to an aircraft manufacturer’s goal of weight saving and fuel efficiency. Used in a tandem sealing system, flight safety is increased, and back pumping enhanced.
Turcon® VL Seal® II Design & Features
Turcon® VL Seal® II is a unidirectional rod seal f or reciprocating movements, consisting of an “L” shaped Turcon® jacket energized by an O-Ring. The innovative design of the seal combines the unique back pumping capability of Turcon® VL Seal® with new patented features:
- An angled seal back allows seal width adjustment to service pressure, improving leakage control
- A leading protective front lip safeguards the sealing edge during hardware assembly
- FEA optimized design eliminates extrusion and improves support for and containment of the O-Ring
- Chamfer on the outer diameter of seal permits rounded corners in the grooves, thereby reducing stress on the hardware
- An angled seal back allows seal width adjustment to service pressure, improving leakage control
- A leading protective front lip safeguards the sealing edge during hardware assembly
- FEA optimized design eliminates extrusion and improves support for and containment of the O-Ring
- Chamfer on the outer diameter of seal permits rounded corners in the grooves, thereby reducing stress on the hardware
Virtual Showroom
The Turcon® VL Seal® II exhibit demonstrates how this seal minimizes leakage in actuators, flight controls and landing gear shock absorbers.
Proven Performance
Tests were conducted, in aircraft operating conditions, to evaluate overall seal performance, in particular leakage control and the back-pumping effect. These included rapid multi-million cycle testing on an advanced test bench that achieves pressure rise rates of up to 360,000 psi per second, and enables accelerated high frequency cycling up to 5 Hz, under maximum pressure or extreme temperature conditions. This enables testing of potential designs for the improved seal to occur in just weeks rather than months, considerably shortening the proving time.
Demonstrating the performance of Turcon® VL Seal® II against Turcon® VL Seal®, which now represents the standard for this type of hydraulic seal, back-pumping performance was more than doubled up to 3,000 psi and almost doubled up to 5,000 psi. Accumulative leakage was around 4 milliliters less and significantly lower (around a half) from 1,000,000 to 2,000,000 cycles.
With the Turcon® VL Seal® II, Trelleborg Sealing Solutions is leading the revolution in hydraulic sealing. Based on the groundbreaking and well-proven Turcon® VL Seal®, this next generation seal offers enhanced sealing efficiency, easier installation, and even greater reliability. In accordance with Lubrication Management Technology, the seal’s back-pumping performance has been optimized to prevent failure. Extensive testing proves its outstanding ‘zero’ leakage performance, to extend service life and minimize planned maintenance.