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CAM-OPERATED DIRECTIONAL VALVE MECHANISM

As cam 1 rotates about fixed axis A, head a, attached to piston 2 of the valve, is lifted, overcoming the resistance of helical spring 3 and closing port d, which is connected to the tank. At this, fluid under high pressure, delivered to port b, flows into the hydraulic system through port e.
$3624$SHP,Va$