The DBF-C and DBF-D type ball valves consist of a 3-piece body. The stem is blow-out proof and, from nominal diameter DN 32, is equipped with a double O-ring seal. When using these ball valves, it should be noted that they are changeover ball valves in terms of sealing. The pressure inlet must therefore be in the middle. Actuators can be mounted using an assembly kit. This retrofitting capability must be specified when ordering (additional cost).