A basic prerequisite for effective valve sealing, is for the sack to be correctly attached to the filling spout. In some cases, inhomogeneous sack quality can lead to sacks being attached askew and consequently, not completely closed. The consequential issues of product leakage out onto pallets and possible pest infestations resulting from this, are absolutely unacceptable for all producers. Using the newly developed VALVO DETECT system, GREIF-VELOX detects whether a sack has been attached at an angle, not completely sealed and must therefore, be removed.
The effects are visible and measurable. This optical measuring process means that 100% of your sacks on pallets are reliably sealed.
The patented ultrasonic process for sealing sacks, our "waffle welding" sealing technique, provides a 60% higher tear-resistance for sack valves (study by TU Lübeck).