Barberi® ball shut-off valves of these series are equipped with running nut and flat seal. These components are normally used directly connected to pumps, water storages, distribution manifolds, heat exchangers, metering devices or wherever a flat seal is necessary to make the disassembling easier. The feature of these valves is the compact shape both in length and in width thanks to the absence of handles. This feature makes the valves suitable to be integrated in closed systems and narrow spaces. The ball can be open or closed by using a flat screwdriver