A physical object intended to compress and supply air or gas at medium pressure and medium volume flow.

A dynamic pump that contains impellers provided with vanes to generate centrifugal force to achieve the required pressure head.

A drier is a physical object that is intended to remove absorbed or adsorbed liquid or water vapour below saturation state.

A physical object that is a long tube or hollow body intended for conduction of liquid, gaseous or finely divided solid materials, or used for structural purposes.

A physical object that adds or removes mechanical energy to a fluid, either constantly or periodically.

A positive displacement pump which contains a displacing element intended to be moved in a reciprocating movement to exert pressure on a fluid, typically moving within a cylindrical space.

A positive displacement pump that consists of a chamber containing gears, cams, screws, vanes, plungers or similar elements actuated by relative rotation of the drive shaft or casing and which has no separate inlet and outlet valves.