Automated dynamic control of pipeline or container pressure

2025-08-26

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In industrial production and scientific experiments, it is often necessary to control the pressure in pipelines or containers, and dynamically control the upstream or downstream pressure of the pipeline, as well as the pressure in sealed containers during the flow of gas or liquid. Based on these needs and existing technical experience, we have developed a pressure controller capable of online automated dynamic pressure control.

 

This pressure controller adopts a straight-through design, with a measurement range from 10Pa to 20MPa (both absolute and gauge pressure available). This series of instruments features high accuracy and good repeatability, divided into upstream pressure control, back pressure control, and pressure control for sealed containers.

 

Equipped with a standard piezoelectric diaphragm pressure sensor and digital circuit board, it provides high-precision, stable, and reliable pressure measurement and control. The basic digital PC board includes all essential functions required for measurement and control. In addition to the standard RS485 output signal (customizable communication protocols such as DeviceNet, Profibus, etc. are also available), analog I/O signals are provided.

 

The pressure sensor is a piezoresistive bridge located on the surface of a silicon chip. The chip is drilled from the back to form a pressure diaphragm inside, whose thickness determines the pressure range. When pressure is applied to the chip, the diaphragm bends, and the resistance of the bridge changes proportionally to the pressure. The measuring element is separated from the external pressure by an ultra-thin sensitive stainless steel diaphragm, and the sealed cavity between the diaphragm and the measuring element is filled with oil.

 

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Pressure controller with display, controlling pipeline pressure

 

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Double-valve pressure controller, controlling sealed container pressure


 

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