Four-Way Valve | Hydraulic Valve

This type of valve is used to control the flow direction by using a pilot pressure. Figure 5-28, shows two units in which the spool is shifted by applying the pilot pressure at either end of the spool. In the spring-offset model, the spool is held in its normal offset position by spring thrust and […]

Hydraulic Manually Operated Four-Way Valve

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Posted by and on January 13, 2011

in Valve

Hydraulic Manually Operated Four-Way Valve

This valve is used to control the flow direction manually. A spool is shifted by operating a hand lever (Figure 5-27). In a spring offset model, a spool is normally in an extreme out position and is shifted to an extreme in position by moving a lever toward a valve. Spring action automatically returns both […]

Hydraulic Four-Way Valves

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Posted by and on January 13, 2011

in Valve

Four-way, directional-control valves are used to control the direction of fluid flow in a hydraulic circuit, which controls the direction of movement of a work cylinder or the rotation of a fluid motor. These valves are usually the sliding-spool type. A typical four-way, directional-control valve has four ports: • One pressure port is connected to […]

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