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Monitoring of air filters:
Differential pressure switches can detect when filters are clogged with dust and dirt. A clogged filter increases the pressure drop and when this drop reaches a preset threshold, the pressure switch can trigger an alarm or system response to indicate that the filter needs to be cleaned or replaced. -
Fan control:
Pressure sockets are also used to monitor the operation of fans. They can ensure that fans are working correctly by detecting the pressure differential caused by fan operation. If the pressure difference is too low, this could indicate a failure or malfunction of the fan, requiring maintenance. -
Monitoring the duct pressure:
In large HVAC systems, it is critical to maintain the correct Pressure within the duct to ensure efficient airflow. Differential pressure switches can help by monitoring the Pressure in different sections of the ductwork and adjusting system controls as necessary. -
System interlocks:
Pressure switches can act as safety interlocks. For example, they can ensure that certain parts of the HVAC system, such as heaters or chillers, only operate when the fan is working properly to prevent overheating or inefficient cooling. -
Fire and smoke control systems:
In the event of a fire, it is critical to control the spread of smoke through HVAC ducts. Differential pressure switches can activate smoke dampers that close to prevent the spread of smoke through the building. -
Variable air volume systems (VAV):
In VAV systems, airflow is varied based on demand. Differential pressure switches can control the Pressure in these systems to control the volume of air delivered to different areas, optimizing energy consumption and maintaining comfort.