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PP line’s upgrade improves efficiency, qualityPP line’s upgrade improves efficiency, quality

An Asian supplier of polypropylene (PP) opted for an upgrade to its screen changer and melt pump and realized via this retrofitting a considerable boost in output and product quality.

PlasticsToday Staff

July 31, 2009

1 Min Read
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An Asian supplier of polypropylene (PP) opted for an upgrade to its screen changer and melt pump and realized via this retrofitting a considerable boost in output and product quality.

The Asian supplier opted for this Kreyenborg melt pump plus screen changer.



The unidentified supplier opted for its retrofit for a completely new discharge unit from Kreyenborg (Münster, Germany), with the new piston screen changer and a melt pump replacing the established melt filter. The retrofitting had two primary goals:  increase throughput capacity of the whole line and increase filter fineness.

The filter area was increased by the replacement of the old slide plate screen changer by a continuous piston screen changer from Kreyenborg, type LK-SWE. Combining this with the new melt pump raised throughput to 9000 kg/hour. Additionally, the piston screen changer allows for continuous operation of the line, as it need not be stopped for changes of the filter media.

The new melt pump provided a sufficient increase in pressure to ensure a higher filter fineness can be achieved. [email protected]

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