Butterfly valves are fittings for shutting off the flow of media such as e.g. water, gas or steam in a pipeline. It is closed by the rotation of a disc, either with a hand lever or - in the case of large nominal diameters - with a gearbox or an electric or pneumatic rotary drive.

Butterfly valves in the intermediate flange version (wafer type), which can be clamped between two flanges, as well as a thread eyelet design (Lug-Type) have only a short overall length. The space requirement within the pipeline is correspondingly low.