The Classification of Common Hydraulic Valve
Hydraulic valve is a kind of component used in hydraulic drive to control the pressure, flow and direction of liquid. The type that controls pressure is called pressure sanitary regulating valve. The type that controls flow is called flow regulating valve. The type that controls the flow direction is called direction regulating valve.
According to its use, pressure regulating valve can be divided into relief valve, pressure reducing valve and sequential valve.
Relief valve can regulate the hydraulic system to maintain a constant state when it reaches the set pressure. A relief valve for overload protection is called a safety valve. When the system fails and the pressure rises to the limit that may cause damage, the valve port will open and overflow to ensure the safety of the system.
Pressure reducing valve can control the branch circuit to get a stable pressure that is lower than that of the main circuit. According to the different pressure functions it controls, pressure reducing valve can be divided into set value pressure reducing valve (the output pressure is a constant value), set difference pressure reducing valve (the input and output pressure difference is a set value) and set ratio pressure reducing valve (The input and output pressure maintain a certain ratio).
Sequential valve can make an actuator (such as hydraulic cylinder, hydraulic motor, etc.) act before making other actuators act sequentially.