The DFPK is a pneumatic piston drive which is combined with various angle seat valves from the VZZA range. Angle seat valves are shut-off and control valves with high flow rates and a compact design. This combination offers maximized variance for process design with minimal complexity. The range of applications is extensive. The units control liquids in beverage filling lines and industrial washing machines as well as gases for steam generation and sterilization. The functional, straightforward design and the ideal arrangement of the control and indicator components make the product smart and intuitive.