The HBSK-C and SIBK-C ball valves are designed as compact ball valves with a fixed push-in socket integrated into the housing and a screwed-in connector. The stem is blow-out proof and mounted externally. The push-in socket/nipple connection variant allows for quick installation into corresponding HP piping systems. With the optional safety locking handle (SIBK-C), in addition to the one-sided detent in the closed position, a two-sided locking of the positions can also be achieved. Also available with lockability.