Sine pumps help transfer 2 tonnes of hazelnut spread every hour

Paul Boughton

The Kessko factory in Bonn, Germany is using four MasoSine SPS series pumps supplied by Watson-Marlow Pumps Group to help deliver high quality ‘sweet’ products to customers in the bakery, confectionery, ice cream, biscuit and soft drink trades. At the heart of this effort, the SPS pumps offer reliable service that includes the transfer of up to 2 tonnes of hazelnut spread (containing soft solids) every 60 minutes.

Inside the production hall, one of Kessko's 180 employees enters the exact weight of 12.5kg of hazelnut spread per container into the filling system. He actuates the foot pedal and the sweet chocolate and hazelnut mixture that children so enjoy spreading on their toast, flows quickly into the containers courtesy of a MasoSine SPS pump.

“We fill 160 containers in this process every hour,” says technical manager Reiner Liffmann, “which is the equivalent of 2 tonnes of hazelnut spread.”

Viscous substances

With their powerful suction, the MasoSine SPS pumps are ideal for viscous substances such as the chocolate spread being handled at Kessko. They provide a particularly gentle, virtually pulsation-free pumping operation. This is what distinguishes MasoSine pumps from other positive displacement models such as gear pumps, for example.

The sinusoidal design of the rotor creates four chambers with each turn, through which the medium – in this case the sweet spread – is pumped from the inlet port to the higher-pressure discharge port. The rotor, unlike on rotary lobe pumps with multiple shafts, is powered by a motor via just one shaft. The scraper gate prevents any liquid from flowing back from the discharge side to the lower-pressure suction side of the pump. Since the chamber volume does not change, the system is perfect for pumping liquids containing soft solids or viscous media.

A heated jacket for the housing is used especially for this type of application, while other pumped liquids require a cooling jacket in order to keep the temperature of the product constant. This is also available for MasoSine SPS pumps.

Even the cleaning of the SPS pumps is a straightforward process. The pump is stripped down in 10 minutes. Once the pumphead front cover has been removed, all the internal parts that come into contact with the product can be removed (without tools) and cleaned. The SPS pumps are also suitable for CIP and SIP cleaning processes.

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