Yuken Counterbalance Valves
These valves maintain hydraulic pressure in a hydraulic system or load backpressure on a cylinder. If the inlet pressure exceeds a preset level, flow is released to keep the pressure constant. They are accompanied with a check valve that allows the flow for lifting a cylinder up to freely pass. To control the cylinder speed, those with meter-in control (see P. 33) are generally used for both upward and downward movement of the cylinder. Similar to the sequence valves, some counterbalance valves are equipped with an auxiliary pilot port.
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