Circuit that routes the outlet flow on the piston rod side of a differential cylinder to the inlet on the piston side to increase the flow velocity (rapid traverse circuit) (Figure T 4). As a consequence, however, the piston force reduces according to the ratio of the annular area to the piston area.
In the case of differential cylinders with the ratio of piston areas of 2, the plunger circuit for fast advance takes on the operation of a synchronising cylinder.
Figure T 4: Regenerative circuit, rapid traverse circuit