Solving the problems of pumping medium-to-high density paper stock
Sarah Benson, John Pacello · World Pumps · 1997
Medium to high density pulp and paper stock is a notoriously difficult material to pump. It suffers from friction loss and resistance to flow at these densities; it can contain as much as 20% entrained air; and the paper fibers are shear sensitive. In the past, stock professors have turned to traditional centrifugal-type pumps to handle stock in the 7% to 18% density range, but with their need for dilution, fluidization and air removal equipment, these pumps are far from ideal. This article describes the development of a highly innovative system, the Discflo disc pump, which solves the problems of pumping medium-to-high density stock. It has been sucessfully installed in several pulp and paper mills arount the world, producing huge cost savings for the user and a higher quality stock.