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Puip rper Application Data No. 62 01/98 fetf Monoflo Provides A Vertical Solution for Coatings Vertically mounted Industrial pumps from Monoflo are helping Iggesund Paperboard (Workington) Ltd in Cumbria to achieve a smooth latex coating on its board packaging materials. Pump: Industrial progressing cavity pump Product: Paper coating latex mix Capacity: 5-26m3/h / 23gpm Pressure: 6 bar / 87 psi Motor: Variable speed drive motor Iggesund Paperboard (Workington) Ltd (IP(W)L) is one of Europe's leading manufacturers of high quality packaging, producing 190,000 tons of folding box board per year, which is destined primarily for the graphics, tobacco and food packaging industries. IP(W)L's Coating and Chemical Plant prepares the special China clay/latex coating mix using a batch process. The coating is designed to give a high gloss finish to the board, producing an ideal surface for printing. Several grades of coating for specific applications are prepared and held in storage tanks until required. Monoflo industrial pumps are used to pump the coating mix from the storage tanks to the final station tank which feeds the top layer blade coater. The final station tank is equipped with a level transmitter, which uses pressure to detect changes in tank level. This information is fed to the central Distributed Control System (DCS) which automatically alters the pumps variable speed drive in proportion to the rate at which the tank is emptying. This ensures total process efficiency by keeping a stable level within the tank. To constantly refill the tanks, the pumps normally operate at 22gpm. The variable speed drive, however, enables this to be automatically increased to rapidly refill a tank that has been completely emptied when changing the grade of coating mix. The coating mixtures can contain up to 60% suspended solids and with viscosities as high as 1200 cp are highly shear sensitive and can therefore be easily damaged during transfer. The Mono pumps, incorporating a helical rotor turning within a resilient rubber stator, provide a smooth low shear action which ensures that the integrity of the coating mix remains intact. In the past, IP(W)L has experienced problems with the sealing mechanisms in alternative pumping systems. After close consultation with IP(W)L, Monoflo has mounted the pumps vertically to ensure that the seal and gland housing is sited above the highest possible liquid level in the tank. This prevents the possibility of seal leakage, which could have costly quality and environmental implications. Although the Monoflo pumps have a good suction lift of 8m, Monoflo designed a unique suction chamber, incorporating a flange immediately above the stator to assist the suction of the pipe. This eliminates the need to install costly and excessive suction pipework. Gavin Yule, IP(W)L's Project Engineer is pleased with Mono's vertical solution to their coating problem, commenting, "The unique installation and Flexishaft design of the Monoflo pumps increases long term reliability, while decreasing the costs and inconvenience of maintenance and downtime". _001 Monflo Inc 9700 West Gulf Bank, Houston, Texas, USA T. +1 281 272 7700 E. inquire@monoflo.com www.monoflo.com Monoflo m One Company, Unlimited Solutions © Monoflo January 2009