Types of proportional directional valves

1. Proportional reversing valve

The proportional directional valve uses the electromagnetic force generated by the electromagnetic coil installed outside the valve core to control the movement of the valve core. It relies on the control coil current to control the displacement of the valve core in the directional valve, so it can control the direction and flow of oil at the same time. flow.

The function symbol of the proportional directional valve is that any desired flow rate and direction can be obtained through the controller, and it also has the function of pressure and temperature compensation; the proportional directional valve has two types of oil inlet and oil return flow control.

2. Proportional pressure valve

Pressure valves all need to be manually adjusted to set the pressure. If the application encounters a hydraulic system that requires frequent pressure adjustment or multi-stage pressure regulation, the circuit design will become very complicated. As long as you are not careful during operation, it will It will get out of control. If the circuit needs to have multi-stage pressure using traditional methods, multiple pressure valves and reversing valves are needed; however, only one proportional pressure valve and control circuit can be used to generate multi-stage pressure.

The proportional pressure valve basically uses the electromagnetic force generated by the solenoid coil to replace the spring setting pressure on the traditional pressure valve. Since the electromagnetic force generated by the solenoid coil is proportional to the size of the current, controlling the coil current can obtain The required pressure can be adjusted steplessly, while ordinary pressure valves can only adjust a specific pressure.

3. Proportional flow valve

Flow valves need to be adjusted manually to set the flow rate. In hydraulic systems that require frequent flow adjustment or precise flow control, proportional flow valves must be used.

The proportional flow valve also uses the electromagnetic force generated by the electromagnetic coil installed outside the poppet to control the opening size of the flow valve. Since the solenoid coil has good linearity, the electromagnetic force it generates is proportional to the size of the current. It can produce a continuously changing flow rate during application, so that the opening size of the flow valve can be controlled arbitrarily.