THE BACK PAGE by Editor Jonathan Newell
PUMP WITHOUT
W
THE CHURN Clotted cream manufacturer keeps the product flowing with an energy efficient sinusoidal pump without damaging the goods
hen a world famous Cornish creamery decided to replace its pumping equipment, the owners had to consider the effect that the viscous clotted product would have
on the machine as well as the possible detrimental effects of the machine on the company’s delicate product. Being the largest clotted cream brand in the UK
and with Protected Designation of Origin status, A E Rodda is famous for its particularly thick cream, which it has been making with care in Cornwall since the company was first set up from a farmhouse kitchen in 1890. Spooning lashings of the cream on a dish of
strawberries may be a delight but pumping it into a pot is a difficult task, made even more challenging by Rodda’s recent requirement to become more energy efficient. According to the company’s maintenance
supervisor, Paul Johnson, the pump is used for transferring the cream from mobile storage tanks, depositing it into a pot and sealing it with a lid. “Importantly, the pump must not damage or
compromise the product integrity, which is crucial to our production process,” he says. In 2012, the company installed a MasoSine SPS
200 sine pump from Watson-Marlow Fluid Technology Group (WMFTG).
48 /// Testing & Test Houses /// March 2019 These kinds of pumps have a gentle sinusoidal
action and are frequently used for food, chemical and cosmetics applications and this same approach was needed for the company’s new pouring cream production facility – low shear, low pulsation and gentle handling. “Using a centrifugal pump, for example, would
effectively churn the cream into something like butter,” says Johnson. “A sine pump was clearly the way forward and we were keen on the new Certa from WMFTG, especially because of its energy- efficiency attributes.” Unlike traditional pumps with rotors that cut
through the fluid, Certa’s sinusoidal rotor gently carries product through the pump to dramatically reduce shear, while cutting power consumption by up to 50 per cent with high-viscosity fluids. Further advantages and high performance levels delivered by sinusoidal technology include virtually no pulsation, simplicity, reliability, interchangeable parts and low cost of ownership. With the new Certa 100 now having replaced
the SPS 200 and been operational for around 12 months, Rodda is achieving a flow rate of as much as 4,200 litres an hour without compromising the product. Additionally, the pump is extremely easy to
clean for minimal downtime being cleaner than any lobe or circumferential piston pump. T&TH
❱❱ Gentle sinusoidal pump keeps the clotted cream flowing at up to 4,200 litres an hour without compromising the texture of the product
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