What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?What is a solenoid valve and how does it work?