Pneumatic valves help to control flow in air systems, typically as part of a pneumatic conveying system in applications such as dry bulk handling. There is a vast range of available pneumatic valves, but all operate essentially by switching air flow. The simplest valves simply turn flow on and off. More complex types include diverter valves, which combine or separate material flows to and from different destinations, and rotary valves, which are a common way to introduce materials into the conveyor.

The application, capital cost, maintenance cost and life of valves need to be carefully considered when selecting a product. Choosing the wrong type of valve can incur considerable maintenance costs and periods of downtime.

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