Innovative Screw-type Vacuum Pump

Screw Vacuum Saves Energy and Water

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Maximum Efficiency With Minimum Maintenance

From conception to start-up, the project to install the Robox WS 65/2V/3F took around two months. At the beginning, Dopla was one of the first companies to try out the new technology in a production environment. Robuschi supplied a prototype unit free of charge, which was hooked up via temporary connections. Once Dopla was satisfied that the new vacuum pump was performing as it should, it was permanently connected to the thermoforming machines.

“It was a gradual process,” says Bergo. “First we connected three lines, then we progressively disconnected the other pumps and connected the last machines to the new pumping unit. All this was done without interrupting production. This is when we started noticing the considerable savings we were obtaining in terms of water and electricity.”


Dopla has benefited from the maintenance point of view too. “The maintenance interventions required by the Robox unit are truly minimal,” Bergo says. "We can easily manage the scheduled checks during production downtime, despite not having a backup unit, although we are considering the purchase of a second unit as a spare.”

“Next May will mark two years since the start-up of the system,” says Bergo, “and we’re really satisfied with our partnership with Robuschi. They proved their helpfulness right away, providing constant assistance during the installation process and closely following all our specific needs. This allowed us to calibrate the machine precisely to suit our requirements.”

The line is now complete, but Dopla wants to evaluate the possibility of adding an inverter that will allow them to manage energy consumption to match the needs of the production line, with the aim of boosting the savings even more.

Dopla had previously successfully installed Robuschi equipment including positive displacement blower packages (the Robox evolution series) in its Treviso factory. “These solutions included three blower units for pneumatic conveying of raw materials — polystyrene and polypropylene pellets — to the silos,” Bergo says. “Generally speaking, our machines have never shown any problems, but in any case Robuschi has always been ready with the answers we needed, and we’re confident that this collaboration will continue.”