The operating principle of the VDD valve is based on a triple position actuator moving a conical plug. The first position enables the valve to be fully opened, thereby minimizing pressure drop. The second position allows intermediate opening for reduced product flow. A micrometric screw located on the top of the actuator enables the precise adjustment of the intermediate flow rate between 0 and 100 % of the nominal diameter. The third position closes the valve and ensures its perfect sealing.
The valve is actuated by compressed air. A spring return guarantees the sealing of the valve in case of a lack of air pressure (NC).
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