Structural principles of pneumatic control valves, differences in control methods, and differences from solenoid valves
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Dear experts, I would like to understand the structural principle of SMC pneumatic control valves, their control methods (the difference between air return and spring return), how to interpret the relevant symbols, and the differences between them and solenoid valves. It would be great if relevant knowledge materials could be provided for study*; thank you!
Go and take a look at the course; it has very detailed explanations
What the original poster wants to know is the difference between a pneumatic directional valve and a solenoid valve: in my opinion, a pneumatic directional valve simply cannot be controlled independently; another component is needed for it to function, as it is merely an actuator； A solenoid valve can directly control the position of the valve core through its electromagnetic coil, and it is capable of multiple positions using dual coils; as a result, it has more functions. However, it requires a power source and functions like a control valve.