The Normally Open Solenoid Valve (NOSV) is a critical component in many automated control systems that regulate the flow of gases and liquids. This type of solenoid valve is designed to remain in an open position when there is no electrical current supplied to its coil. Only when the coil is energized does the valve close, preventing the flow of fluid or gas. Understanding how Normally Open Solenoid Valves work and their wide range of applications is essential for anyone involved in fluid control, automation, or industrial processes.
What is a Normally Open Solenoid Valve? A Normally Open Solenoid Valve operates with the principle that the valve remains open in its default state, allowing fluid or gas to pass through. The valve is held open by a spring, and only when an electrical current is applied to the solenoid coil does the magnetic field generated by the coil pull a plunger or armature that closes the valve. This actuation stops the flow, ensuring that fluid or gas is no longer allowed to pass through the valve. The most common configurations for these valves are used to control gases, liquids, and even some granular substances in various industries. The design of these valves is simple, yet highly effective in managing flow in both critical and non-critical applications. Normally Open Solenoid Valves are often contrasted with Normally Closed Solenoid Valves, where the latter remains closed by default and opens only when the solenoid is energized.