In irrigation valve systems, which device is typically actuated by electricity to open or close the valve?

• A. Electric solenoid diaphragm valve
• B. Manual gate valve
• C. Check valve
• D. Pressure reducing valve

Answer: (A)

Electric actuation in irrigation valves uses an electric solenoid diaphragm valve. When voltage is applied, the solenoid creates a magnetic pull that moves a plunger and lifts the diaphragm, opening the flow path. When the voltage is removed, a spring returns the diaphragm to the closed position. This setup lets a controller energize or de-energize the valve remotely to run individual irrigation zones. The other devices don’t use electrical signals to open or close: a manual gate valve is operated by hand, a check valve prevents backflow and doesn’t control opening with electricity, and a pressure reducing valve changes pressure rather than acting as an on/off control.