Category: Hydraulic Circuit Design

Hydraulic Fail-Safe Circuit

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Hydraulic Fail-Safe Circuit

Fail-safe circuits are basically designed to prevent injury to the operator or damage to the equipment. In general they prevent any accidental fall or overloading of the equipment. Figure 10.7 shows a fail-safe circuit in which the cylinder is prevented from falling in the event of a hydraulic line rupture. To lower the cylinder, the …

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Hydraulic Cylinder Sequencing Circuit

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Hydraulic Cylinder Sequencing Circuit

From our earlier discussions, we have seen how a sequence valve can be used to create sequential operations in a hydraulic circuit. The circuit depicted in Figure 10.6 contains a hydraulic system in which two sequence valves are used to control the sequence of operation of two double-acting cylinders. When the DCV is shifted into …

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Counterbalance Valve Application

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Counterbalance Valve Application

Figure 10.5 illustrates the use of a counterbalance or backpressure valve to keep a vertically mounted cylinder in upward position during pump idling. The counterbalance valve is set to open at a pressure slightly above the pressure required to hold the piston up. This permits the cylinder to be forced downward, when pressure is applied …

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