These valves are used to control the direction of hydraulic flow by electrical means. A spool is shifted by energizing a solenoid that is located…
Month: January 2011
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…
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…
The four-way, sliding-spool, directional-control valve is simple in operation principle and is probably the most durable and trouble free of all four-way, directional-control valves in…
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…
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…