The main differences between normally open (NO) and normally closed (NC) solenoid large size double flange butterfly valves in pneumatic systems lie in their default states and operation.
Here’s a breakdown of the differences:
- Default State:
- Normally Open (NO) Valve: In a normally open solenoid valve, the valve is open when the solenoid is not energized. This means that air can flow freely through the valve when there is no electrical power applied to the solenoid.
- Normally Closed (NC) Valve: In a normally closed solenoid valve, the valve is closed when the solenoid is not energized. This means that the valve blocks airflow in its default state, and air can only flow through the valve when electrical power is applied to the solenoid, causing it to open.
- Operation:
- Normally Open (NO) Valve: To allow air to flow through a normally open solenoid valve, electrical power must be applied to the solenoid, causing it to energize and close the valve. When power is removed from the solenoid, the valve returns to its default open state, allowing airflow to stop.
- Normally Closed (NC) Valve: To stop airflow through a normally closed solenoid valve, large size double flange butterfly valve electrical power must be applied to the solenoid, causing it to energize and open the valve. When power is removed from the solenoid, the valve returns to its default closed state, blocking airflow.
- Applications:
- Normally Open (NO) Valve: Typically used in applications where it is desirable for airflow to continue when power is lost or during normal operation, and where the valve needs to close to stop airflow under specific conditions or during emergencies.
- Normally Closed (NC) Valve: Typically used in applications where it is necessary to block airflow by default and open the valve only when electrical power is applied, such as in safety-critical systems or applications requiring precise control over airflow.
- Safety Considerations:
- Normally Open (NO) Valve: May be preferred in applications where safety dictates that airflow should continue even in the event of a power failure, as the valve defaults to an open position when power is lost.
- Normally Closed (NC) Valve: May be preferred in applications where safety dictates that airflow should be blocked by default and only allowed when specifically activated, as the valve defaults to a closed position when power is lost.
In summary, the main differences between normally open and normally closed solenoid large size double flange butterfly valves in pneumatic systems lie in their default states, operation, applications, and safety considerations. The choice between the two types of valves depends on the specific requirements of the pneumatic system and the desired behavior in terms of airflow control.
