Walter Rau relies on Garvens/Safeline solutions

Walter Rau Lebensmittelwerke and Co KG, a German food producer, maintains high standards thanks to technical solutions from Garvens and Safeline, both members of the Mettler Toledo PI Division.

Walter Rau complies with the DIN EN ISO 9001:2000 process-oriented standard and successfully applies an HACCP concept.

Its production plant in Hilter, Germany, has been audited in line with the International Food Standard (IFS) since February 2004 by the Fresenius Institute.

The plant achieved the highest IFS level from the beginning and has consistently been able to maintain this.

A checkweigher of the type S3 from Mettler-Toledo Garvens checks the product weight in the production line of the 'Deli Reform' margarine classic.

This 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 behaviour of upstream fillers, thus optimising the margarine portions.

Automatic feedback control is one of the software options that is available with this model and many other Garvens checkweighers; it guarantees high accuracy in filling products into containers and reduces expensive giveaway of product substance, meaning that it is a major asset to a quick return on investment.

It also ensures that any 'off-weights' not suitable for trade are rejected.

Another Garvens S3 checkweigher is used for Walter Rau's cooking fats and oils for large-scale consumers and industrial use.

For example, the solid fat rods are checked at a conveyor speed of 20m/min, the checkweigher weighing up to 40 rods in a minute.

All Garvens checkweighers in the Walter Rau plant are connected with the Freeweigh.Net statistical quality-control system, which provides evidence of the fill quantities.

This quality-control system provides reports for evaluating the production data.

The stored article (product setup) details and the evaluation of production batches are a proof of the course of production, which can be precisely traced back.

Graphics enhance the reports so that production analyses - even over long periods of time - are facilitated.

Beside the checkweighers, the Freeweigh.Net system can also monitor the metal detectors used in the production lines.

In another section of the 'Deli Reform' margarine production line, the margarine packs are conveyed in a single lane through a metal detector from Mettler Toledo Safeline.

The Signature Safeline detector model can be integrated in a range of standard or bespoke conveyor systems and excels in maximum detection sensitivity because of its modern multi-frequency technology.

Even small metal particles can be detected.

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