2 results:
1. VFW vacuum tank  
… The resulting vacuum causes the substrate to be sucked into the tank. In combination with the foam separator, the siphon prevents over-suction of slurry into the compressor. Suction Vacuum compressor …  
2. Gu__lletechnik_2022_GB_web.pdf  
… valve 3. Preparation for filling dome 4. Additional siphon, up to 8600 l 5. Foam separator, from 10,600 l 6. Suction nozzle, left or right, for easy suction, incl. docking station 7. …