NITRON TVT22, Installation Instructions Manual, Page: 4 / 16

Introduction
4
Tri-Valve Technology (TVT)
In addition to the main piston in the compression leg TVT cartridges also employ a third piston which gives a
great deal of flexibility when designing the damping curve for a specific application. This piston also utilizes
shims in much the same way as the main compression piston but with this design the shim stack is
preloaded. During slow to medium speed movements of the fork in compression such as braking or through
undulations in the road the damping is created by the main piston. As the pressure in the compression
cartridge reaches a certain point the preload on the second piston will be overcome and oil can now flow
through the TVT ports reducing overall damping for the higher fork speeds.
The main piston in a TVT fork cartridge can be valved to create firmer damping in the low to mid speed
range of compression velocities giving improved brake support and control of weight transfer leading to
improved rider confidence. With a single compression piston design this would normally result in unwanted
high speed damping forces being generated at higher compression velocities such as square edged bumps
and surface irregularities.
On track, professional riders have praised the system describing new found levels of confidence particularly
during high speed , hard edge bumps which combined with hard braking and cornering forces would
normally unsettle a well damped set up. Likewise on the road this system has allowed new levels of
compliance on bumpy poorly surfaced roads.