PTG Tyre Inflation Systems

2 line systems for adjusting tyre pressure while moving

  • RDS/portal 2L for forage harvesters  more >>

    RDS/portal New Holland with digital control

    2 line tyre inflation system for harvesters


    In collaboration with the engineers of New Holland, the RDS/portal has been adapted and type approved in 2 line technology especially for harvesters. The newly developed RDS/portal is the perfect system for comfortably adjusting air pressure on your harvester while in motion. The air lines are led through the axle tube and the axle to the tyre; lines led outside the vehicle and around the wheel are now no longer necessary!


    With the RDS/portal, the rotary joints are spared from external influences completely integrated into the axle housing of the machine and work completely maintenance free. A special life-time grease filling at the gasket seals allows for grease nipples to be done away with and makes tedious, time-consuming maintenance intervals a thing of the past!


    Thanks to its innovative technology through which the rotary joints run depressurized simultaneously with the machine and pressurized only during the brief periods of tyre pressure adjustment, the gasket seals of the RDS/portal usually keep for the lifetime of the machine.


    Moreover, in using special tyre valves, the RDS/portal system offers high operational safety. For instance, in the event of a line break, even if the system is activated, the tyres will not lose any air (unlike the 1 line systems) because the proven RDS tyre valves will immediately close on their own in such an event and keep the tyres from losing any pressure.


    In using these valves, the tedious closing of the shut-off valves in the rims is also done away with (known from the 1 line technology) before starting the drive on the road or parking the machine for the night. This technology is now a thing of the past for New Holland harvesters.


    The RDS/portal is supplied by the harvester’s high-performance compressor system that enables the tyre’s inflation in only 2 to 4 minutes (depending on tyre size and the desired change in pressure). Tyre deflation happens in approx. 2 minutes.


    Operating the RDS/portal 2 line technology is done simply and comfortably using the digital control console in the cab.

  • AIRBOX/drive 2L for forage harvesters more >>

    AIRBOX/drive 2L with digital control

    2 line tyre inflation system for harvesters


    In principle, the AIRBOX/drive 2 line technology works by transferring air from a stationary component (stator) to a rotating component (rotor). For this process to work, pressure-resilient gasket seals are installed in the stator that in interacting with the rotor cause annular channels through which the air pressure flows, also while the vehicle is moving.


    The rotary joint is screwed onto the wheel studs concentrically to the middle axle using a fitting stirrup. Rotor and stator are embedded lined up with one another. Both a large line and a small control line rotate synchronously with the rotor and are led to the synchronously rotating tyre valve.


    In the rim, a tyre valve with a non-return finger device is installed that will immediately close in the event a line tears and will keep the tyre from losing pressure.


    The rotary joints and the entire air line system at the front and rear axles are pressurized only during an active control cycle. The patented two-line principle ensures that after every pressure change the tyre is closed off and all transfer units (including gasket seals) are depressurized, thereby sparing the system from unnecessary wear.  This technology also sees to it that the tyre loses no air in the event of a leak in the regulating system or a break in the line, thereby guaranteeing increased safety.


    The air lines run over the fender through a telescopic tube and are led to the middle of the wheel. Using the telescopic tube, the clearance to the side of the rotating wheel can be individually adjusted.


    The large line and the control line are connected to the rotary joints using quick-action couplings so that they can be easily removed when not in use and placed on the fenders in empty coupling points.


    Operating the AIRBOX/drive 2 line technology is done simply and comfortably using the digital control console in the cab.


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