Pneumatic controls are powered by compressed air usually 15 to 20 psig pressure although higher pressures are occasionally used for operating very large valves or dampers. Pneumatic devices are inherently modulating, as air pressure can be modulated with infinite variation over the control range. Because of their simplicity and low cost, pneumatic controls are frequently found on commercial and industrial installations where more than eight or ten devices are used. Distribution piping in pneumatic control system is usually soft copper tubing with soldered fittings. Nylon reinforced plastic tubing is also frequently used.

Pneumatic control valve is a valve, which embodies a diaphragm chamber and a piped connection to a compressed air supply, which acts on the diaphragm to modulate the operation of the valve.

Pneumatic controls training program is designed to familiarize trainees with the basic operation, maintenance, and calibration of components in a pneumatic control system. This training program describes how to service the various devices that help dry and filter the air and how to check pressure control devices in the system for proper operation. It also describes the basic operation and maintenance of some typical control components in a pneumatic system.

In pneumatic-conveying drying, powered moist product is carried through a duct system by heated air or gas. The product offers a large surface area to the turbulent drying medium, with the result that rapid transfer of heat and moisture takes place and drying occurs within a few seconds. One of the other benefits is high drying efficiencies with low costs. Pneumatic-conveying dryers can typically handle materials in the size range of 5-500 µm. Continuously operating pneumatic conveying dryer is used for applications similar to the tray and compartment dryer. However, drying is performed in conjunction with grinding, as the solids are conveyed and dried within the unit.