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GEA’s Hilge NOVATWIN completes its line of hygienic screw pumps

March 25, 2020Chris Crowell

GEA pumps

With its new flexible screw pump, GEA Hilge NOVATWIN, GEA fulfills customer needs for the highest hygienic demands for gentle product handling, long-term reliability, versatile applications and professional support. The new positive displacement pump completes GEA’s portfolio of hygienic pumps. The GEA Hilge NOVATWIN is fit for a ton of industries. In brewing specifically, the company highlighted its use with handling brewing yeast.

“Solutions à la “one pump fits all” are not very effective and are neither our philosophy nor our claim. The addition of this promising pump type to the portfolio alongside the established rotary lobe pump GEA Hilge NOVALOBE will significantly strengthen GEA’s position in the positive displacement pump sector,” says Stefan Andresen, Business Development Manager Hygienic Pumps. 

Product details: Conveying and cleaning with one pump

The new twin screw pump will be available in 6 sizes. It is part of the GEA VARIPUMP line. Twin screw pumps have two screws which interlock without contact and form a closed chamber together with the pump housing. The screws rotate and thus move the medium along the screw axis from the suction to the discharge side.

Like positive displacement pumps in general, twin screw pumps stand for the gentle conveyance of lumpy, shear-sensitive and abrasive media. They offer exceptionally high flexibility for pumping liquids of different viscosities. The special feature of the twin screw pump is its dual function, as they can not only pump the actual, often highly viscous product, but can also function as a CIP pump, as they can also be operated at very high speeds. Compared to alternative solutions, the use of an additional CIP pump can thus be saved. 

The self-priming, hygienic GEA Hilge NOVATWIN enables safe operation with low pulsation and low noise levels at high product viscosities, temperatures up to 135°C and differential pressures up to 25 bar. The system pressure of 30 bar also allows the pump to be used in high-pressure applications. It enables one pump to handle both sensitive viscous media at low speed and cleaning media in the CIP process at up to 3,000 rpm.

A constant flow at different pressures and volumes is another advantage. Due to its self-priming property (suction height up to 8 meters), other application areas can be served. For special requirements due to the pumped medium, GEA offers additional options such as a heatable or hardened pump housing. The heatable housing as an option allows the pump chamber to be heated or cooled depending on the temperature requirements of the pumped medium.

Keyword “hardened pump housing”: In case of abrasive media the screw spindles and additionally the pump housing can be hardened to increase the lifetime of the pump. Due to the low-pulsation and gentle pumping, the properties of the pumped media are retained in their appearance, structure and size. By using different screws with different pitches, the pump can be optimally adapted to the pumped medium in terms of solid size and differential pressure. This also enables gentle pumping such as yoghurt with pieces of fruit or meat salads with solids with a diameter of up to 44 mm. 

Designed according to strict hygiene guidelines 

The delivery of hygienically perfect and high-quality liquids requires absolutely clean pumps. They must be cleaned immediately at the end of a production and absolutely clean and free of bacteria at the beginning of a new production phase. “Cleaning” refers to the process in which the surfaces are completely freed from adhering product, deposits, etc. A carefully cleaned surface is free of visible, tangible or chemically detectable residue of contamination. The GEA Hilge NOVATWIN is designed according to EHEDG guidelines and complies with 3-A requirements. 

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