Tags: pilot

Hydraulic Pilot Operated Relief Valve

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Hydraulic Pilot Operated Relief Valve

The direct acting and pilot operated relief valve have a different pressure vs. flow curve although both of them perform the same function. The pilot operated relief valve allows the operation over a wider pressure range. The figure above shows the functional diagram of pilot-operated relief valve. The orifice on the main spool balanced the …

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Pilot Operated Valve

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Pilot Operated Valve

On large hydraulic valve the force needed to operate the valve also increases. If the force is too large for solenoid or manual operation, then we can use pilot operated valve. The working principle of pilot operated valve is shown in figure above. In the example the valve 1 is used to move a ram, …

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Pilot Operated Check Valve

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Pilot Operated Check Valve

According to the schematic above the cylinder should remain in its position when the control valve is in its center position or off position. But in practice the leakage in control valve will allow the cylinder to creep. Check valve would not have any leakage in closed position but we can’t use a simple check …

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