Watson-Marlow Bredel supplied their peristaltic pump technology to a Cornish food manufacturer for the transfer of liquid egg in glazing processes.
Cornwall Rowe’s, the food manufacturer was repeatedly facing failure with conventional impeller pumps and turned to Watson-Marlow Bredel for a solution.
Cornwall Rowe’s operates two large production sites and 17 retail outlets with more than 400 employees. As well as selling products such as pasties, savouries, sandwiches, cakes, breads, rolls and confectionary through its own stores, the company also supplies on a wholesale basis to virtually all of UK’s leading supermarkets.
Phil Thomson works as part of a team at Rowe’s that ensures production is both continuous and efficient, which can be quite challenging.
A recent problem involved the pasty production line where egg mix is pumped into a glazing unit consisting of a container with two integral spinners. The spinners create a mist that is allowed to fall and form a glaze on pasties passing below on a conveyor.
A conventional impeller pump used for the task kept failing repeatedly causing downtime in the production process.
Mr Thomson explained that the lack of a non-return valve in the impeller pump was causing the problem, requiring the pump to be re-primed every time the process stopped.
Additionally, the congealing egg required the pump and its connections to be cleaned every time, resulting in escalation of downtime.
Rowe’s was already using chemical dosing pumps from Watson-Marlow on site and Mr Thomson was aware of the capabilities of peristaltic technology.
Rowe’s took the recommended 520 series process pump from Watson-Marlow on a trial basis. After a two-week trial at the company’s production facility in Falmouth, Rowe’s duly acquired the Watson-Marlow 520 series pump.
Mr Thomson is extremely satisfied with the performance of the peristaltic pump. Rowe’s has placed an order for another pump and hopes to replace all their pumps with Watson-Marlow peristaltic pumps over the next two years.
Mr Thomson adds that peristaltic technology makes far more economic sense in the long term once downtime and labour costs are added to the cheaper impeller pumps.
Key advantages of Watson-Marlow peristaltic pumps:
- No valves, seals or glands with the fluid contacting only the bore of the hose or tube
- Eliminates the risk of the pump and fluid contaminating the other
- Allows users to clean in-line at full velocity, without the intrusion of the bypass required by most other positive displacement pumps
- Self-draining design with low-shear action and straight-through flow
- Tube is fully swept for superior hygienic performance