A normally open (NO) valve is a type of solenoid valve that remains open when de-energized and closes when energized. This design allows for fluid flow in its default state, making it useful in applications where continuous flow is required until a specific action is taken.
Characteristics
– Default State: Open when not powered
– Operation: Closes when electrical current is applied
– Applications: Ideal for systems where flow is needed until a signal is received
– Response Time: Typically quick, allowing for rapid control of fluid flow
– Design: Can be found in various sizes and materials to suit different environments
Examples
– Irrigation Systems: NO valves can be used to allow water flow until a timer or sensor activates the valve to close.
– Pneumatic Systems: In air control systems, an NO valve can maintain airflow until a pressure switch is triggered.
– Cooling Systems: Used in chillers to keep coolant flowing until the system reaches a certain temperature, at which point the valve closes.