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machinery feature | Melt filtration


system, which redirects the flow of material into the new cassette The company also claims that the Becoscreen works completely maintenance-free and leak-free, and can be used for almost all polymers. Parkinson Technologies used this


year’s NPE exhibition to introduce the latest development from its Key Filters division. Designed for use with the com- pany’s continuous screen-changers, its new ScreenLync system enables operators to


Berhalter says its Becoscreen screen-chang- ers are based “an ingeniously simple operation”


construction that allows a more direct melt flow in the melt channels. This reduces the back pressure in the melt flow and the associated energy consumption. In addition, a melt flow without large deflections and dead spots allows for faster product or colour changes, the company claims. New sealing technology also features on latest


Nordson Xaloy’s


slide-plate


screen-chang- ers can


perform at high temperatures and pressures


slide-plate screen-changers from Nordson Xaloy. The company says it provides reliable leak-proof melt filtration at higher temperatures and pressures and substantially lower viscosities. The seal is said to enable the slide-plate screen-changers to perform reliably at temperatures up to 345°C, pressures up to 515 bar (7,500 psi), and viscosities as low as 15 Pa.s. “This represents a significant improvement in performance with low-viscos- ity materials in comparison with earlier sealing systems for slide-plate filtration,” Nordson Xaloy says. “The new sealing technology has


exhibited leak-free operation in more than 2,000 hours of lab trials by Nordson Xaloy and over 100,000 hours of service in dozens of production applications,” says Kevin Tuttle, the company’s business development manager for melt stream products. The new sealing system is available on both manual and hydraulic slide-plate screen-changers, and it can be retrofitted on existing equipment. Berhalter’s Becoscreen screen-changers are based on what the company says is an ingeniously simple operation, with sliding cassettes holding clean filter inserts introduced on one side and removed for cleaning on the other side. The material flow is directly through the screen-changer, without division of the melt in multiple channels, avoiding the creation of dead spots. Berhalter claims that the Becoscreen is the only


system on the market capable of bringing a 100% clean filter medium into the melt stream at each change. “The function of our continuous screen-changer is not reduced,” it says. This is made possible by a “preflood”


64 COMPOUNDING WORLD | July 2015


connect sequential screen rolls together. This provides a quick and easy way to feed the new


screen directly into the chamber of the machine. It reduces operational downtime as the machine does not have to be cleaned out before the new screen is installed. The company’s latest KCH continuous hybrid


screen-changer features an optimised flow passage with a larger filtration area, resulting in a substantial capacity increase. It also boasts an automatic screen shear system that allows the operator to set the desired cut-off length. The machine then handles the cutting of the filter waste for added safety.


Click on the links for more information: ❙ www.fimic.itwww.adgs.netwww.cofit.comwww.ngr.atwww.britas.dewww.gneuss.dewww.nordson-k.comwww.starlinger.comwww.maag.comwww.econ.euwww.xaloy.comwww.berhalter.chwww.parkinsontechnologies.com


www.compoundingworld.com


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