Hydraulic Actuator with Load-Sensing Variable-Displacement Pump

This example shows a circuit using a load-sensing and pressure-limiting unit in a conventional reciprocal system with variable load on the forward stroke. The unit limits output pressure to 300 bar and maintains a preset pressure drop in 10 bar across velocity control orifice OR. The unit is built of two 3-way, 2-position valves, two single-acting hydraulic valve actuators SA and SA1, and one double-acting hydraulic valve actuator DAA.

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