A Normally Open Solenoid Valve (NO Solenoid Valve) is an essential component in many fluid control systems, playing a crucial role in automation, fluid regulation, and safety management. These valves are particularly unique due to their operating mechanism and are widely used across various industries such as HVAC systems, water treatment plants, and pneumatic systems. In this article, we will explore the working principle, types, applications, and benefits of the Normally Open Solenoid Valve.

What is a Normally Open Solenoid Valve? A Normally Open Solenoid Valve is a type of valve that remains open when the solenoid (electromagnetic coil) is not energized. In its default state, the valve allows the flow of fluid—whether gas, water, or other liquids—through the pipe. When the solenoid is powered by an electrical current, it activates the electromagnetic coil, which in turn closes the valve, stopping the flow of the fluid. Once the electrical supply is turned off, the valve reverts to its default open state. This simple yet effective design offers a number of advantages, especially when flow control needs to be maintained under specific conditions, such as during power failures or when precise control of fluid flow is necessary.