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Brewing success

25th September 2017

Posted By Paul Boughton


Filling the Steinie bottles, which had their height and diameter redesigned
Stainless steel push-in connectors of the Eisele series 17 easily withstand the conditions in the wet areas of beverage filling systems

Hygienic stainless steel connections prove reliable in brewing a traditional German beer, explains Thomas Maier

Due to their high-quality material and craftsmanship, stainless steel push-in connectors are the often the first choice for connecting pneumatic control lines in the wet areas of filling systems. Push-in connectors, which combine reliability and durability, are proving a success at one of Germanys oldest breweries.

Technological and logistical innovation

In addition to the brewery’s well-known traditional green bottle of bock beer, which is sold in crates of 20, the shorter Steinie bottle, sold in crates of 30, is also high in demand.

The brewery completely redesigned the unwieldy crate to produce a more manageable container with considerable advantages for the environment.

Not only is the new design more practical for transport and storage by the consumer, but it also achieves 50% higher logistical efficiency: optimal pallet utilisation now allows stacking of 42 crates per pallet instead of the previous 28, yet still with 30 bottles per crate.

The advantages in terms of handling, transport and ecology are obvious. This is made possible by use of a Steinie bottle whose diameter and height have been optimised and which can be used in its existing form by any other brewery, as well.

Advanced technology for hygienic applications

All filling systems have stringent hygiene and cleanability requirements, which is why breweries depend on high-quality stainless steel components down to the smallest detail.

Series 17 of the Eisele Inoxline is a good choice for this requirement.

The push-in connectors with a release sleeve and one seal are available in many versions, are manufactured from non-corrosive and acid-resistant stainless steel 1.4301 and are designed to meet very stringent requirements with respect to cleaning and corrosion resistance.

Durable, FDA-approved seals ensure a reliable seal from -0.95 to 16 bar. The new filling systems at the brewery are equipped with Eisele connections as standard equipment. In the older bottle filling systems, nickel-plated brass connections were still being used for some connections between the control lines and valves in the wet area, which proved to be less than ideal in the wet and aggressive environment.

Constant temperature changes and the effects of acids, alkaline solutions and cleaners resulted in extreme wear and leaky connections, which then had to be replaced. Nor were the surfaces of these pneumatic connections ideal with respect to hygiene.

Around 10 years ago, the brewery went in search of alternative connection components and discovered the Eisele solution and ordered several connections for test purposes.

The results convinced the brewery. Since then, it has not experienced any problems with these connections and maintenance expense and machine downtimes have been reduced considerably.

As a result, all of the old connections for pneumatic control lines were successively replaced with components of the Eisele Inoxline in the course of maintenance and repairs.

The brewery’s new filling systems are also equipped with these components as standard equipment.

A suitable solution for every application

The general purpose stainless steel connectors enable very fast connecting and disconnecting of compressed air tubes without the use of tools.

Even in the case of frequent connecting and disconnecting – for maintenance purposes, for example – the patented collet prevents damage to the tube and ensures a tight seal at all times. All it takes to disconnect the tube is to press on the release sleeve.

The screw-in end for mounting the push-in connector on the machine or process valve is sealed with an enclosed O-ring. Series 17 components allow the full flow rate inside the tube despite their compact design.

The connectors proved to be a good choice for filling systems for beer specialities; in the future, components from the product line will be involved in producing every single bottle of bock beer from Lower Saxony’s beer capital.

Thomas Maier is MD of Eisele Pneumatics









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