The flow can flow with regards to the core motion and depends on whether the solenoid has flowed or not. If the current flows, the coil will force the core to open up the channel/valve, and when It's not at all flowing, the channel will probably be shut. บทความเครื่องจักรกลการเกษตรและอะไหล่ Does https://diaphragmseal55666.blogs100.com/18650216/the-basic-principles-of-pneumatic-actuator-ball-valve