What are the main properties of Hydraulic Valves?Hydraulic valves direct the flow of a liquid or gas through a hydraulic assembly. The direction of the hydraulic fluid is determined by the spool, which is the knob on the exterior of the valve. A hydraulic system cannot function without the use of valves. Every hydraulic assembly requires a valves, be it one valve or multiple valves. Their uses can be as simple as one relief valve to protect the pump and actuator, or their uses can be complex, with a variety of different types of valves used for one function. The size of the required valves is determined by the maximum flow of the hydraulic fluid through the valve and the maximum system pressure.
Different valves have different functions. Check valves let fluid flow in one direction and block flow in the opposite direction. Directional control valves are used to pass on the pressure medium (the flow) in a particular direction. Pressure control valves switch on or off at a certain pressure. Flow control valves regulate the flow of hydraulic fluid by adjusting the size of the bores (orifices). Needle valves use a tapered pin to gradually open a small space for precise control of flow.