b'STOCK PREPARATIONPrime in stock preparationThe next generation in screening and fractionationBy Sampo Kylijrvi, Product Manager, ANDRITZ Paper, Fiber and Recycling DivisionWell-known with over 5,400 pressure screens installed in numerous stock preparation lines worldwide, ANDRITZ presents the latest evolution in screeningthe PrimeScreen X. The innovative design of the new screen builds on the successes of the widely valued ModuScreen family, but offers innovative, key benefits. The improvements in energy efficiency, screening performance, and maintainability are significant.Focusing on customers needs and market demands whilst benefitting from ANDRITZ long-term know-how in screening, the PrimeScreen X passed through all stages of product development - from the initial engineering design to prototyping and two years of mill testing in the most demanding of OCC applications.Figure 1. PrimeScreen X. The PrimeScreen X (Figure 1) is ideal for all types of screening applications,and extending the life of wearingThe PrimeScreen X uses a uniquely regardless of the raw material.components. designed drive flange to connect the rotor to the hub, so maintenance or MAIN FEATURES OF THE Prime Prime replacement is quick and easy. The Screen XRotor and foils for increased The main design improvements of theefficiency and lower power consumption.innovative clamping system to fix the new screen include: The screen can be equippedscreen basket in place allows faster with the new PrimeRotor, whichscreen basket changes.Top-feed stock inlet. The design usesimproves screening efficiency andthe new gravity to quickly remove heavyreduces energy consumption byPrime Optimized screen basket height-to-Rotor contaminants. With this top-downup to 25%. The PrimeRotor foilsimprovesdiameter ratios. The PrimeScreen X is design, abrasive contaminantsare interchangeable with any otherscreeningdesigned so that the optimized screen that cause wear to the rotor andANDRITZ foils, and the rotor could beefficiencybasket height-to-diameter ratios screen basket are not forced to flowinstalled in any screen type availableand reducesmeet the requirements of different slowly upwards through the entireon the market.energyfurnishes and applications. This helps screen. Top-down also improves theconsumptionto reduce the thickening factors and removal of light rejects, preventingEasier maintenance. Changing basketsby up leads to better control of fiber loss as their accumulation in the feed areaand rotors is time-consuming work. to 25%. well as reduced potential for plugging.18 TISSUE TECHNOLOGY INTERNATIONAL'