Attempt to represent hydraulic circuit, current source is pump first 10r is filter, other rs are pipe and ram restrictions, zener diodes are pressure relief valves. Earth points are return to tank. When valve is off flow goes to tank, when on can build flow and pressure in actuators. Values need tweaking to give 70 litres/min (A), 190bar pressure (19V). Capacitors and series Rs added to simulate pressure build up when cylinder at end.
