Hydraulic balance valve Large flow counterbalance valve CXED-XCN cartridge valve

Basic structure of flow control valve
Flow control valve is mainly composed of valve body, spool, spring, indicator and other parts. Among them, the valve body is the main body of the whole valve, and the internal hole is provided for guiding the fluid through. The spool is installed in the valve body and can be moved to change the size of the through hole, thereby controlling the flow of fluid. Springs are often used to provide adjustment and compensation for the spool position to maintain a stable flow rate. The indicator is used to show the current volume of traffic.
Principle of proportional solenoid valve

It is based on the principle of the solenoid switch valve: when the power is cut off, the spring presses the iron core directly against the seat, closing the valve. When the coil is energized, the resulting electromagnetic force overcomes the spring force and lifts the core, thus opening the valve. The proportional solenoid valve makes some changes to the structure of the solenoid on-off valve: the spring force and the electromagnetic force are balanced under any coil current. The size of the coil current or the size of the electromagnetic force will affect the stroke of the plunger and the opening of the valve, and the opening of the valve (flow rate) and the coil current (control signal) have an ideal linear relationship. Direct acting proportional solenoid valves flow under the seat. The medium flows under the valve seat, and its direction of force is the same as the electromagnetic force, but the opposite of the spring force. Therefore, it is necessary to set the sum of the small flow values corresponding to the operating range (coil current) in the operating state. When the power is off, the Drake liquid proportional solenoid valve is closed (normally closed).

Proportional solenoid valve function

Throttle control of the flow rate is achieved by electrical control (of course, pressure control can also be achieved by structural changes, etc.). Since it's throttle control, there must be a loss of power.