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Hydraulics - Seafish

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11<br />

From Pump<br />

(A) ,(P) (B)<br />

Raise<br />

Hold<br />

(T)<br />

To Reservoir<br />

Figure 11.<br />

In Figure 11 the valve is shown in the 'hold' position. In this<br />

position the actuator (cylinder or motor) is held stationary<br />

because the oil cannot flow from P to A or from P to B.<br />

In the 'raise' position, shown in Figure 12 the oil flows from P to<br />

A and drains from B to T.<br />

(A)<br />

From Pump<br />

Raise<br />

Hold<br />

(T)<br />

To Reservoir<br />

Figure 12.<br />

In the 'lower' position, shown in Figure 13 the oil flows from P to<br />

B and drains from A to T.<br />

<strong>Seafish</strong> Open Learning

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