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The valves incorporate an integrated regenerative circuit design intended to accomplish pressure-dependent speed increases of up to twice that of the speed generated by existing pump flow.
The remaining three binary modes divert oil from in front of one cylinder to the back side of another cylinder through a regenerative circuit, which creates added oil capacity to develop extra injection speed.
Some Japanese suppliers use the approach of teaming up pairs of large and small injection cylinders and using regenerative circuits on some cylinders to transfer oil from one side of the piston to the other.

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