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Precision flow control for efficient, accurate pneumatic conveying systems

Precision flow control for efficient, accurate pneumatic conveying systems

Modern environmental control standards can be difficult to maintain when working with powders and small particles as part of a manufacturing process. One of the most effective solutions is to use pneumatic conveying, which also offers a number of benefits when compared to more traditional methods.

These advantages include reduced maintenance, and improved operational environment, system flexibility, the possibility to carry out physical mixing or chemical reactions during the conveying process, and the ability to convey air-sensitive materials using an inert gas, such as nitrogen, to prevent oxidation.

Pneumatic conveying is used by a wide range of industries including food and beverage, pharmaceutical, chemical and power generation. The main challenges for those operating a pneumatic conveying system are keeping the consistency of the product and maintaining a precise controllable flow of the product. However, the modern manufacturing enterprise must also operate as efficiently as possible and this means reducing costs and improving productivity. Effective and precise process control can have a major influence on manufacturing efficiency but in the past this could provide a significant challenge to those with pneumatic conveying systems.

One recent innovation from Bürkert uses a closed loop controller, pressure sensors and a control valve, all combined into a single unit. The Type 8750 flow rate controller provides an automated air flow control solution that can reduce operating costs and improve productivity through better flow control and management of the compressors.

The flow rate control system is supplied as a complete assembly that negates the requirement for a separate flow meter. Using the pressure difference across the valve and the given density and temperature of the medium, a nominal flow can be calculated, providing the flow characteristics of the valve to the process controller.

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