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Contec® GmbH, Bad Honnef Germany developed a new wedge wire filter

08-18-2015 12:14 PM CET | Industry, Real Estate & Construction

Press release from: Contec® GmbH, Bad Honnef

Contec Wedge wire filter

Contec Wedge wire filter

An example of use in the filtration of high viscosity bitumen at high temperatures.

Contec® is a leading manufacturer of filtration systems, oil mist separators and liquid level measuring technology. It has recently developed a filtration system for the production of cold self-adhesive vapour barrier sheets for large roofs with bitumen for Rasco.

The filtration challenge:
• Medium: viscous polymer bitumen for cold self-adhesive vapour barrier
sheets
• Liquid temperature: approx. 130°C.
• Viscosity @ 130°C: about 100,000 mPas
• Viscosity @ 140°C: about 45,000 mPas

As a subsidiary of a leading international supplier of construction adhesives, Rasco GmbH in Augustdorf, Germany produces cold gluing thin bitumen sheets for roof areas of more than 2,500 m² with a thickness of approximately 0.3 mm. Because of the required low coat thickness problems in production are unavoidable. Polymer bitumen at 140°C is applied with a layer thickness of = 0.3 mm on a plastic laminated carrier sheet.

To avoid malfunctions during the production process, it is necessary to filter the hot polymer bitumen composition. However, due to the high viscosity of the material with decreasing temperature, disassembly and maintenance of the filter are possible only at full working temperature.

The solution:
The hot bitumen compound is filtered through a newly developed wedge wire filter by Contec® with hinged lid and internal clutch. In addition, the filter is equipped with a heating jacket through which it can be integrated into the existing factory thermal oil plant. By this construction a tool-free removal of the filter element is possible at full working temperature. The filter holds back the clumping reliably, so that production takes place smoothly and trouble-free.

About Contec® GmbH, Bad Honnef:
The Contec® GmbH, Bad Honnef, Germany manufactures innovative systems and components in the areas of air and gas filters, oil mist separators, liquid filters and liquid level measurement.

Contec® GmbH, Bad Honnef
Iwona Kügler
Heideweg 24
D-53604 Bad Honnef

T. +49-(0) 22 24 . 98 93-0
F. +49-(0) 22 24 . 98 93-20

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