Overview of the hydraulic control valve pressurized cylinder pressure cylinder hydraulic control valves control the hydraulic system components, their role is through the pressure of the hydraulic system oil flow direction, pressure, size, flow rate control, so as to achieve the implementation of components movement direction, the output force (or torque) the size of the output velocity control. Regardless of the hydraulic system, certain functions are done by some of the basic hydraulic circuit components, and hydraulic circuit mainly by the various hydraulic control valves require a certain combination to achieve the same purpose for the hydraulic circuit, the choice of hydraulic control valves or a combination of various different ways, the loop performance is not the same. Therefore familiar with the performance of various hydraulic control valves, basic circuit characteristics, the hydraulic system for the design and analysis is extremely important. Different according to their functions, the hydraulic control valve can be divided into three main categories: directional control valve: If the check valve, valve and so on. Pressure control valve: If the relief valve, relief valve, sequence valve. Flow control valve: If the throttle, the governor valve. Accordingly, these valves can be composed of three basic circuits: the direction of the control loop, the pressure control loop and speed loop. Different ways according to the control, hydraulic valve can be divided into common hydraulic control valves, servo valves, proportional control valves. Different forms depending on the installation, hydraulic valves can be divided into tubular, plate and cartridge type, and so a number of species. The basic types of hydraulic valve operating parameters are rated pressure and rated flow, different flow makes the rated pressure and rated each of the hydraulic valve has a variety of specifications. Directional control valve is used to change the oil in the hydraulic system fluid flow between the broken relationship and the flow direction of the valve. Such as the one-way valve, valve and so on.
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