When an automotive assembly robot lifts a door panel from an empty vacuum pad, the system must instantly cut off the airflow to keep the pad from sucking in stray particles. The Schmalz flow valve is mounted in the suction line of each pad and automatically closes when the pad is not holding a part. By isolating the idle pad, the valve prevents loss of vacuum pressure across the whole manifold, reduces energy consumption and eliminates the risk of contaminating the next component. This makes it possible to run high‑speed pick‑and‑place stations that handle body‑in‑white panels, engine‑block carriers, or interior trim without pausing the line for pad cleaning. Because the valve reacts to the pad’s occupancy sensor, multiple pads can share a single vacuum source while each one is protected individually, enabling compact cell designs and faster changeovers between model variants. In logistics‑type conveyor stations, the same principle helps keep empty suction cups from pulling debris, extending tool life.