Sometimes, centrifugal cleaning is followed by deaeration (ie: extraction of air entrained), where a large stock area is exposed to a vacuum. This improves formation, and reduces air inclusions on the PM wire that can give rise to pinholes. Eg: Deculator (Andritz-Ahlstrom). The Multi Retention Deculator conventionally squirts stock into an evacuated chamber. In the Flying Wing Deculator and Space Saver Deculator versions, rows of integral centrifugal cleaners discharge accepts into the chamber. This reduces total pumping energy, and cleaner performance is improved by the vacuum discharge.
Context 1 source:
EN 16
Attestation 1:
2
Context 2:
Conventional pressure screens use baskets with either slots or holes to admit the fibrous “accepts” flow and reject the contaminants. Slotted screens usually have a sculptured pattern that helps fibers to become aligned and pass through the screen. Pressure screens are equipped with various types of rotors to continuously redisperse any fibers that start to accumulate on the screen surface.
