Cooker firm cuts contamination
November 1st 2005

When Glen Dimplex Home Appliances on Merseyside wanted an efficient means of pumping vitreous enamel on to the surfaces of its cookers, it turned to peristaltic technology.

The company had developed a method of spraying enamel using high speed disc technology.

Initial use of this technology employed pressure pots that used pressurised air to force the fluid to the application, which in turn atomised the material.

These pressure pots proved unreliable, leading to concerns about repeated cross contamination when changing colour, and irregular flow of material to the atomising head.

The company trialled a peristaltic pump from Watson-Marlow Bredel Pumps and hasn't looked back since. Ian Anders, metal finishing manager, says "One of the problems with vitreous enamels when processed is that it is more like a grinding paste than a fluid, so the pump needs to be robust and reliable."

Now, nothing but the hose or tube touches the fluid, eliminating the risk of the pump contaminating the fluid or the fluid contaminating the Watson Marlow 505DU and 504U pumps.

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