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HDU control system upgrade

Minimal air consumption through reliable guide operation

The HDU control system upgrade includes replacement of the pendulum sensor and pneumatic controls in older belt-guiding systems. Clothing wear can thus be reduced.

Instead of replacing the entire guide system, a less expensive option is to replace the pendulum sensor with the relevant pneumatic controls in an HDU control system upgrade. The paddle of the pendulum sensor resting against the fabric edge uses a cradle-switch to activate two nozzles that control the pressures in the belt-guiding system in the event of belt runoff. Fabric service life is maximized due to the highly accurate design and low contact force of the pendulum sensor. With low investment costs, clothing wear at the edges can be minimized with the aid of the upgrade.

The HDU pendulum sensor with controller can be mounted on many of the pneumatic guide models used in paper machines. A prior technical verification is required.



Thomas Buchmaier

Global Product Manager Guides & Stretchers


t +49 7321 37 3153