An EV EasyGo™ is an alternative concept for the slalom section. It combines the web stabilizing and the vacuum roll technologies to ensure good runnability and paper quality up to certain speed limits.
The EV EasyGo concept is installed on top of the vacuum rolls to support the sheet and create a vacuum inside the vacuum roll. The concept exhausts air through the holes of the vacuum roll, blows air through the nozzles of the web stabilizer and thus creating vacuum from the opening nip to the closing nip. The sheet is fully supported at both sheet down- and uprun.
Section conversions to vacuum roll technology
Drilling of the cylinders on site without the cylinder being removed enables minimal downtime. Drilling of the cylinders is easier and less expensive than exhausting from the cylinder heads: no grooving and change of cylinder heads and bearings also mean minimized downtime. Drilled holes of the vacuum rolls are big enough to prevent clogging. With a vacuum roll conversion and an EV EasyGo installed on top of the drilled roll the sheet will be fully supported, connecting the exhaust air system to the web stabilizer and not the vacuum roll. This also enables a ropeless tail threading in the single felted area.
EV EasyGo concept goes eco!
EV EasyGo concept has a new updated version, EV EasyGo eco. Energy efficient eco concept includes web stabilizer with reduced need of supply air for the sealing blowing nozzles. Supply air amounts compared to traditional stabilizer technology can thus be remarkably reduced, bringing energy saving potential into process without any negative impact on the overall functionality.
EV EasyGo concept in Burgo Villorba, PM 8, Italy.
Drilling of the cylinder
Excellent runnability and tail threading
Enables draw reduction between the press and dryer section
Savings in raw material costs due to decreased usage of long fibers