A Normally Closed Solenoid Valve (NCSV) is a vital component used in various industrial and commercial applications to control the flow of liquids or gases. The main function of this valve is to remain closed when there is no power supplied to the solenoid coil and to open when an electrical current activates the solenoid. This type of valve plays an essential role in automation systems, safety mechanisms, and fluid management applications.

What is a Normally Closed Solenoid Valve? A Normally Closed (NC) solenoid valve is designed with the principle that in its resting state, the valve is closed. The term “normally closed” refers to the default position of the valve, where the flow of fluid or gas is blocked. When the solenoid coil receives electrical power, it generates a magnetic field that moves the valve’s internal mechanism (usually a plunger or diaphragm), opening the valve and allowing the fluid or gas to pass through. When the power is switched off, the magnetic field dissipates, and the valve returns to its default closed position.