The HBS-C, SIB-C, HBS-D, and SIB-D ball valves are designed with a rotatable socket connection (DN 10-20) in a housing with 2 screwed-in connection pieces. The stem is blow-out proof and mounted externally. The socket/nipple connection variant allows for quick installation into corresponding HP piping systems. With the optional safety locking handle (type SIB), in addition to the one-sided detent in the closed position, a two-sided fixation of the positions can also be achieved. Also available with lockability.