Camma directional valve with DSR3L and DSR3H wheel are directional valves with cursor, with mechanical wheel drive, for assembly on the plate. The Valvols are available in Light (short) and Heavy Duty (long) two -position versions, with spring return. DSR3L is also available with double cam. This type of valve is used as a hydraulic running, speed switching (not compensated), hydraulic safety, inversion devices of the movement of hydraulic axes.