The original Valon Kone rotor
Since the beginning, Valon Kone has manufactured debarking rotors with hydraulic tool arm tensioning. Each tool arm is equipped with its own hydraulic cylinder and rubber spring, which together apply and maintain the required pressure. Tool arm pressure is adjusted using a separate hand pump by increasing or decreasing the spring tension. Because all hydraulic cylinders are connected to the same hydraulic circuit, pressure can be adjusted quickly and uniformly across all tool arms.
The simplicity of this hydraulic system ensures reliable operation, easy adjustment, and long service life, making it a proven solution for demanding debarking applications.
The new generation Valon Kone rotor
Originally developed for the North American market, Valon Kone introduced its new-generation pneumatic debarking rotor in the mid-1990s. The technology quickly proved its value, and its success led to its use across Europe and other global markets. Today, Valon Kone's Air Seal rotor technology is used in Kodiak debarkers for North America as well as in VK debarkers supplied worldwide.
The pneumatic rotor uses compressed mill air to generate tool arm pressure. The patented Air Seal system continuously supplies pressurized air from outside the rotor, allowing tool arm pressure to be adjusted automatically during the debarking process. When the rotor is empty, only enough pressure is applied to keep the tool arms in position. As a log enters the rotor, PLC-controlled valves increase the air pressure to a preselected level, providing the force required for efficient bark removal. Once the log leaves the rotor, the additional air pressure is released, and the system returns to its holding pressure, ready for the next log.
Combined with heavy-duty components and a high-capacity air flow system, Valon Kone's Air Seal rotor delivers fast response, reliable operation, and precise pressure control. The result is efficient, high-quality debarking across a wide range of operating conditions.
