Figure 5-23, shows a typical four-way, poppet-type, directional-control valve. It is a manually operated valve and consists of a group of conventional spring-loaded poppets. The…
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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…
A two-way valve is generally used to control the direction of fluid flow in a hydraulic circuit and is a sliding-spool type. Figure 5-21 shows…
Check valves are the most commonly used in fluid-powered systems. They allow flow in one direction and prevent flow in the other direction. They may…
Figure 5-13 shows a sliding-spool valve. The valve element slides back and forth to block and uncover ports in the housing. Sometimes called a piston…
Figure 5-12, shows a simple poppet valve. It consists primarily of a movable poppet that closes against a valve seat. Pressure from the inlet tends…
Directional-control valves also control flow direction. However, they vary considerably in physical characteristics and operation. The valves may be a • Poppet type, in which…
Pressure switches are used in various applications that require an adjustable, pressure-actuated electrical switch to make or break an electrical circuit at a predetermined pressure.…
A counterbalance valve allows free flow of fluid in one direction and maintains a resistance to flow in another direction until a certain pressure is…
Sequence valves control the operating sequence between two branches of a circuit. The valves are commonly used to regulate an operating sequence of two separate…