A Normally Open Solenoid Valve (NOSV) is a crucial component in fluid control systems, widely used in industries such as automation, irrigation, HVAC, and safety systems. This article aims to explain the operation, common applications, and advantages of the Normally Open Solenoid Valve.
What is a Normally Open Solenoid Valve? A Normally Open Solenoid Valve is an electrically controlled valve designed to regulate the flow of gases or liquids. As the name suggests, it is typically open when de-energized (i.e., without electrical power applied) and closes when the solenoid coil is energized. The valve operates based on an electromagnetic mechanism where the flow passage is controlled by a movable plunger or diaphragm. When the coil receives electrical power, it generates a magnetic field that pulls the plunger or moves the diaphragm, closing the valve and stopping the fluid flow. Once the power is removed, the spring mechanism or gravity returns the valve to the open position.