The working principle of cartridge valve

The working principle of cartridge valve:

From the structure sketch, it can be seen that it has two pipeline connections A, B and a control port C, the upper cavity of the cone valve is connected to the pilot control valve, which is connected to the control of the oil circuit. From the working principle, it is equivalent to the hydraulic check valve, when the control oil port C is connected to the oil tank, the cone valve opens, A, B two oil ports are connected, so the use of the pilot control valve to make the C port unpressurized or pressurized, you can achieve the opening and closing of the cone valve.

The combination of cone valve and small flow solenoid valve can constitute a directional valve, as shown in Figure (b) for the cone valve type directional valve. Cone valve and a variety of pilot pressure valve combination can constitute a variety of pressure control valves, such as Figure (c) shows the cone valve pressure valve. If port B is the return port, the valve acts as a relief valve. If the B port is connected to a branch of the system, the valve plays the role of sequence valve.

It can be seen, a cone valve accordingly with solenoid valves and pilot pressure valves or take measures to regulate the speed of the system can play the role of directional valve, pressure valve or throttle valve.