PSI-Polymer Systems Inc. went to NPE2009 with a new screen changer that it claims has improved safety and performance.
The CSC-BF from PSI is aimed at recyclers wishing to clean out contaminants from the resin stream. Its design dictates only a small amount of resin is needed to backflush the material through the unit to clean the screen packs that filter the material.
PSI designed backflush ports on the bottom of the unit, as opposed to the side ports common on competitive backflush screen changers. This allows contaminants to be flushed out of the unit safely, General Manager Robert Martin said in an interview at NPE in Chicago.
The CSC-BF divides the incoming melt stream into two streams, both of which are filtered in the top and bottom pistons, he said. When upstream pressure rises due to a high contaminant level, the programmable logic controller actuates each piston to its backflush position, allowing pressure to push the contaminants off the clogged screen packs.
Like other PSI screen changers, the CSC-BF comes with guaranteed leakproof operation to 10,000 pounds per square inch, and has no seals or contact parts. PSI claims that the changer increases screen pack life by up to 25 times and provides increased output due to reduced back pressure.
Martin said international sales have grown for the 9-year-old company, which is headquartered in Conover, N.C. Sales have been especially strong in the Pacific Rim, he said.
PSI's new, 45,000-square-foot facility is three times the size of its former one in Hickory, N.C., and allows enough room to expand, Martin said. He did not disclose the cost of the facility or what was spent on machine tools installed during the recent move.
In addition to filtration equipment, PSI supplies gear pumps, static mixers and diverter valves.
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