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Processing high-quality raw materials with great care – with this philosophy the food producer Walter Rau Lebensmittelwerke GmbH & Co. KG in Germany has become a specialist for margarine, cooking fats and oils.

"Product safety is the focal point of our work", explains Herbert Knapmeyer, Head of electrical engineering and automation in the Walter Rau production facilities. "To us, the consistent development of our quality management system has always been a matter of course", continues Mr. Knapmeyer. The company Walter Rau complies with the process-oriented standard "DIN EN ISO 9001:2000" and successfully applies a HACCP concept.

The Walter Rau production plant in Hilter, Germany, has first been audited as per IFS (International Food Standard) in since February, 2004, by the Fresenius Institute. The production plant achieved a top result: the highest IFS level right from the beginning and has consistently been able to maintain this ever since.

Since the end of the seventies this quality-oriented company trusts in the innovative technical solutions from GARVENS and SAFELINE, both members of the METTLER TOLEDO PI Division. A checkweigher of the type S3 from Mettler-Toledo Garvens checks the product weight in the production line of the margarine classic "Deli Reform". This line is a four-lane production line with one of the lanes passing the S3 checkweigher. The continuously captured weight data allows the checkweigher feedback control to automatically correct the filling behavior of upstream fillers and thus to optimize the margarine portions.

Automatic feedback control is one of the software options that are available with this model and many other Garvens checkweighers; it guarantees highest accuracy in filling products into containers and reduces expensive giveaway of product substance – thus it is a major asset to a quick return on investment. It does of course also ensure that any "off weights" not suitable for trade are reliably rejected.