4-Bar suction cup bag valve opener


Previous Design
A single suction cup design with linkage that rotates through a circular arc produces and angled lift on the bag’s valve.

Updated Design
Dual suction cup arrangement with 4-bar linkage provides superior valve opening performance. The vertical lift of the suction cups minimizes vacuum break and provides up to 4” of opening for duckbill insertion.


  • Adds needed means for additional opening of bag’s valve
  • Straight forward and easy to adjust
  • Replaces special cylinder with standard “off-the-shelf” cylinders
  • Rugged industrial design
  • Dual suction cup helps ensure positive valve opening