Hydraulic solenoid valve

Hydraulic solenoid valve is used to control the automation of basic components of the fluid belonging to the actuator; not limited to hydraulic, pneumatic. The solenoid valve used to control the direction of hydraulic flow, the mechanism of the plant by hydraulic cylinder control solenoid valve, so it will be used.


Hydraulic solenoid valve is used to control the fluid pressure, flow and direction of the components in the hydraulic transmission. Control pressure as the pressure control valve controlling the flow referred to as flow control valve to control the pass, breaking and direction as the direction control valve.


A pressure control valve use is divided into the relief valve, pressure reducing valves and sequence valves.


(1): Relief valve able to control the hydraulic system when the set pressure is reached to maintain a constant state. Relief valve for overload protection known as the safety valve. When the limit value of system failure, the pressure that may damage the valve port open the overflow, in order to ensure the safety of the system.


(2): Pressure reducing valve depression than the main loop oil and stable pressure control branch circuit. It controls pressure reducing valve can be divided into a fixed value of pressure reducing valve (output pressure to a constant value), fixed differential pressure reducing valve (input and output pressure difference value) and fixed ratio pressure reducing valve (between input and output pressure to maintain a certain percentage).


(3) action after sequence valve: make an actuator (such as hydraulic cylinders, hydraulic motors, etc.), and then the order so that the actuator action. Pump pressure of the first to promote a movement of the hydraulic cylinder, the area A through the sequence valve in the inlet role, when the hydraulic cylinder a movement entirely into pressure, the role of the upward thrust of the area A is greater than the spring adjustment fixed value, the spool rise to the port connected to the inlet and the oil hydraulic cylinder movement.


Flow control valve, adjust the spool and the valve orifice area and its local resistance to regulate the flow, so as to control the speed of movement of the actuator. The flow control valve use is divided into five kinds.


(1): The throttle it is set orifice area, little changes in the load in the pressure and the implementation of the sports uniform low velocity components remained essentially stable.


(2) control valve: pressure change in the load can maintain throttle pressure drop for a given value. Thus, in the orifice area it is set, regardless of the load pressure of changes in the control valve can maintain constant flow through the throttle valve, so that the implementation of the components of velocity stability.


(3) diverter valve: regardless of load size, make two of the same oil source implementation of the components equal flow for the same amount of shunt valve or synchronization valve; traffic pro rata for the proportion of shunt valve.


(4) On the contrary,set flow valve: the role of the diverter valve to flow into the set flow valve pro rata.


(5) diversion set flow valve: both the shunt valve and set flow valve two functions.


3 directional control solenoid valve use is divided into one-way valve and the valve.


(1) one-way valve: allows only one-way connected to the fluid in the pipe, the reverse is cut off.


(2):Valve to change between different piping through, broken relationship, according to the working position of the spool in the valve body, two, three; According to the channel under the control of several two-way, three links, Stone, five pass; points depending on how the spool drive manual, motorized, electric, hydraulic.