Differential Pressure Switches are essential to a system’s overall functionality and performance. They are used to measure and monitor system pressures and alert operators of any changes. From monitoring water pressure in a boiler system to measuring air pressure in a compressed air system, a Differential Pressure Switch is an essential tool for efficient and reliable operation in various applications.
What is a Differential Pressure Switch?
The Differential Pressure Switch is an essential electro-mechanical system that works by levering and opposing forces. Basically, it measures the pressure difference between two points in a system or plant. This allows the Differential Pressure Switch to be a reliable solution for many industrial pressure sensing applications.
The operating principle of a differential pressure switch is simple yet effective. The switch is designed to detect and respond to a difference in pressure between two distinct sources in a process. Upon sensing this pressure difference, a force is created which overcomes the pre-tensioned spring, resulting in an actuation of the microswitch.
The sensing diaphragm is contoured to detect high and low pressures, providing superior accuracy and reliability compared to traditional twin-element pressure differential switches. This design feature helps eliminate errors due to differences in the area of the diaphragm, a common problem in most switches. The diaphragm shape also helps to improve response and sensitivity, ensuring superior performance in any application.
This particular design of differential pressure switch illustrates the basic principle of operation. However, there are various switch variations from different manufacturers, and the operating principle remains the same. Therefore, it is essential to note that the specific design and its components may vary depending on the manufacturer and the application.
By the usage of an elastic diaphragm, excessive and occasional method stress ports are separated. This pressure difference is then transmitted with minimal friction to the plungers of the micro-switch, which contains the switch’s electrical contacts. Upon reaching the required pre-set switch points or setpoints, the micro-switch actuates, thus providing an electrical signal. To protect the diaphragm from overpressure, contoured metal bolsters are provided.
On the differential pressure switch case, the setpoint screws make it easy to adjust the switch point or setpoint. In addition, the integrated graduated scales provide accurate adjustment of the switch points and instant indication of the adjusted setpoint. This ensures a precise setting of the switch points for optimal performance.
In conclusion, the differential pressure switch is a highly efficient and reliable device that works based on a difference in pressure between the high and low-pressure ports. This pressure difference is converted into an axial movement that actuates the micro-switch contacts to the desired setpoint(s). This ensures that the pressure is constantly monitored and controlled to the setpoint, ensuring optimal system performance and safety.
Applications for Differential Pressure Switches
- Air Proving: to ensure safety and regulation of air pressure in ventilation systems.
- Fans: to monitor air circulation and provide the proper functioning of fans.
- Ventilation Flow: to monitor airflow and identify any problems with air circulation.
- Air Filter Health/Status: Check air filters’ quality and health.
- Exhaust Ducts: to ensure the proper functioning of the exhaust system.
- Cleaning and Purification: to maintain clean air and eliminate impurities.
- Dirt and Dust Filter Loading: to monitor the amount of dirt and dust on filter surfaces.
- Combustion Exhaust Venting: to monitor and regulate the exhaust from combustible materials.
- Exhaust/Flue Airflow Blockage: to identify when obstructions are blocking airflow.
- Flue Gas: to measure the gas output from exhaust systems.
- Air Conditioners: to monitor airflow and pressure for proper functioning.
- Heating/Venting Blower Fans: to maintain appropriate temperatures and air circulation.
- Gas Pressure: ensure the pressure of combustible gases is within safety guidelines.
BCST Differential Pressure Switch
BCST has 21 years of experience manufacturing differential pressure switches, offering unmatched quality control from raw materials to the finished product. With a wide range of configurations available, BCST differential pressure switches are perfect for nearly every industry, assuring you that you have the right product for your specific process. In addition, our fast delivery and abundant raw material stock ensure you always get your product when you need it. Plus, when you choose BCST, you get the added benefit of OEM design services. All this makes BCST the ideal one-stop solution for reliable and quality differential pressure switches.