PUMPS & PUMPING SYSTEMS FEATURE
SEEPEX EHEDG PROGRESSIVE CAVITY PUMPS FOR HIGHEST PRODUCT QUALITY
SEEPEX has recently launched the latest design of hygienic progressive cavity (PC) pump which has achieved EHEDG certification, delivering the highest microbiological results with residue free cleaning guaranteed using CIP systems
T
he EHEDG pump is the latest addition to the Seepex’s range of hygienic PC
pumps which are used widely wherever thin to highly viscous, shear sensitive products and those containing soft solids need to be transferred. Food processors have to ensure that product quality and viscosity can be maintained throughout processing and packaging; selecting the best pumps for shear sensitive products is therefore vital to deliver the best product to consumers. Traditional pumping systems can have a
detrimental effect on the quality and texture of some dairy products, particularly yogurt, with shear stresses changing the product consistency by shear thinning, producing a ‘thin runny’ product. Often costly additives are used to
preserve or restore product quality changes; however, there is another solution – the use of progressive cavity pumps with their gentle, low shear
action, ability to handle soft solids without damage and minimal pulsation flow rates.
SHEAR STRESS – BACKFLOW AND ‘SLIP’ Traditionally, twin screw or lobe pumps are used to handle products such as yogurt after the fermentation stage, when the product has set. The running clearance between the screws or lobes results in backflow – also known as ‘slip’ – and this is the main cause of shear- thinning which, in the case of yogurt production, can cause breakdown to a runny, thin product. The higher the pumping pressure, for example through heating or cooling equipment, the more this slip increases. SEEPEX PC pumps are known for their
gentle handling of viscous products. This is due to their unique design, which enables the product to move through the
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The ultra-hygienic BCFH pump range has a low shear action, making it ideal for sensitive foodstuffs such as yogurt
pump in a series of cavities. These cavities are not compressed or distorted in any way, creating a gentle, non- pulsating flow. This ‘non-slip’ action preserves the quality of shear-sensitive products such as yogurt. Additionally, minimal pulsation action creates a smooth laminar flow through pipelines and ensures a constant feed through heat exchangers, minimising mechanical stress and product thinning. SEEPEX PC pumps are used in many
dairy manufacturing plants globally, including for pumping fruit yogurt where the ability to handle soft solids without damage is essential for maintaining fruit piece integrity. PC pump flow has minimal pulsation and linear accuracy, delivering accurate dosing with simple calibration and controls when adding flavours and syrups either in batch or in- line into liquid or viscous products.
Below: SEEPEX’s low shear hygienic PC pumps maintain product quality
SEEPEX
www.seepex.com T: +44 (0) 1935 472 376
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