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Categories : Hydraulic valves
Three spool hydraulic valve
Three spool hydraulic valve allows fluid to flow into the engine. In one position it allows fluid to flow to the engine, while in the other position it drains fluid from it. Some spool hydraulic valves also have a third position that is responsible for blocking the flow in all ports.
Spool valves are usually used for one-way control. These valves are ideal for obtaining complex connections in simple sliding mechanisms.
The spool valve has two elements: a cylindrical barrel in which slides a plunger. Port blocking is provided by a reel or full-diameter sections on the reel, separated by tapered sections that ensure port connections through the barrel. This makes it possible to switch valves in many directions as well as many positions.
Spool valves are usually slide valves that have seals and have a simple design. Gaskets can be O-rings or squares. They are located between the valve spaces, so that a seal is provided between each port.
A hydraulic spool valve is a tool that allows you to control hydraulic devices. The three hydraulic spool valve is used in virtually all devices - from automotive power steering to large construction cranes. The slide valve turns on and off the flow of hydraulic fluid from the hydraulic pump to the cylinder. With this function you can block the path that the fluid flows through.
A hydraulic slide valve is nothing more than a cylinder enclosed in a housing. It usually has valves that lead to the pump and tank on one side, and on the other there are valves that lead to one or more hydraulic devices. The pressure in the device can flow to the valve from the pump or flow back to the hydraulic storage tank. The valve controller moves it back and forth in the housing to allow the reels to be moved to different positions. To perform a specific task, the flow of hydraulic fluid is possible only in one direction.
The spool in the slide valve is a cylindrical member of large diameter. Its shape is adapted so that it slides in the tight-fitting opening of the valve body. The spool valve has a seal at the clearance between the movable spool and the housing. The degree of sealing depends on the type of fluid (its viscosity), size of the gap, and above all on the pressure in the system. In a situation where the operating pressure increases, then the gap must be reduced.