Device for controlled operation of a surgical or dental drive unit

A device for controlled operation of a surgical or dental drive unit which is driven by a compressed fluid source, comprising:

• a control valve attachable to a drive unit for controlling a flow rate of a compressed fluid flowing from a compressed fluid source to the drive unit;
• and
• a control sleeve axially displaceable along a longitudinal axis of the control valve, movement of the control sleeve moving the control valve between first, second and third positions, wherein in the first position, the control valve is locked and closed, in the second position, the control valve is unlocked and the flow rate of the compressed fluid is regulated by a first control arrangement, and in the third position, the control valve is unlocked and the flow rate of the compressed fluid is regulated by a second control arrangement.