The pressure switch BPSN4KB25XFSP19 uses a spring-loaded piston system in which the piston is in direct contact with the pressure medium. When the force of the pressure medium is greater than the restoring force of the spring, the piston will move. This mechanical movement can be converted into an electrical signal to achieve pressure monitoring and control.

Specifically, the pressure switch BPSN4KB25XFSP19 contains the following key components:

1. 1. Piston: The piston is in direct contact with the pressure medium and moves with changes in pressure.
2. 2. Spring: The spring is used to load the piston and provide a fixed pressure reference. When the pressure exceeds the set point, the piston compresses the spring.
3. 3. Transmission mechanism: The movement of the piston is converted into switching actions through the transmission mechanism, and these actions can trigger electrical signals.
4. 4. Electrical interface: Pressure switches are usually equipped with an electrical interface for outputting signals, such as switching signals or analog signals, for use by control systems.

When pressure increases, the piston pushes the transmission mechanism, causing the switch to operate, triggering an electrical signal. This signal can be used to start or stop a pump, open or close a valve, warn an operator, or log data.

The pressure switch BPSN4KB25XFSP19 can be used in the oil filter of the steam turbine’s hydraulic oil system to monitor the differential pressure changes of the filter element. In the hydraulic oil system, the filter element plays an important role in filtering impurities in the oil. As time goes by, more and more particles will accumulate on the filter element, causing the oil flow and pressure to decrease.

By installing the pressure switch BPSN4KB25XFSP19 in the oil filter, the pressure difference between the oil entering and leaving the filter element can be monitored in real time. When the oil passes through the filter element, due to the filtering effect of the filter element, the pressure flowing out of the filter element will be lower than the entering pressure. This pressure difference is the differential pressure. When the differential pressure exceeds the preset threshold, the pressure switch will trigger a switch action and output a signal to the control system, indicating that the filter element may be clogged or needs to be replaced.

This application ensures the normal operation of the hydraulic oil system and prevents problems such as excessive system pressure or insufficient oil flow caused by filter blockage. Timely monitoring and maintenance can help extend the service life of equipment and improve system reliability and efficiency.
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