Difficult bulk goods that are weighed or stored in containers need to be discharged quickly and residue-free. The ROWEFLEX® pinch valve releases the entire cross-section when the container is opened. This supports a fast and complete discharge of the product. Especially in processes where different bulk goods must be merged, the pinch valve can be interconnected as a flexible regulation component. With the parallel use of several pinch valves, product flows can be precisely regulated. The fully flexible sealing devices are available in an open or closed design, whereby in both cases the elastomer used can be adapted to the given circumstances.