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MATERIALS HANDLING


DEPENDABLE R


DOSING


ecently, a production plant in China that makes thermoplastics found itself needing a dosing system for viscous media. The challenging aspect of this application was to reliably pump liquid


media across a wide range of viscosities, at relatively high pressure and precision. The company requiring the pump is an international leader in the development, production and supply of high-quality thermoplastics. It has a specialised R&D department in the Netherlands and its main production sites are located in the Netherlands, Belgium, China, India and the USA.


Suurmond developed a fluid dosing unit that incorporates a stainless steel gear pump for the China site


VISCOUS MEDIA DOSING IN CHINA The Chinese site was in need of a high-precision, viscous media dosing unit to dispense small quantities of additives to a compounding process that takes place in a mixing extruder. There were also stringent demands in   range of viscosities, typically from 150 to 1,500 mPas. Moreover, the item at the top of the wish list was


‘a dependable unit’. It goes without saying that for the company, as supplier to the world’s largest electronics manufacturers, failure to deliver on time is not an option. Based on the customer’s detailed needs and


 incorporates a stainless steel gear pump.


38 www.engineerlive.com


Wim van der Kolk presents a case study on an innovative dosing system for a range of viscosities


The dosing solution was built as a mobile unit that incorporates pump, motor, buffer tank and controller


This type of rotary positive displacement pump


 applications. The pumps have superior corrosion resistance and can withstand high temperatures. This type of pump has proven to be capable of accurately handling a wide range of viscosities. The solution was built as a mobile unit that includes


 tank and the controller for the complete unit. One of the controller’s functions is to enable setting of the additive dosing rate. The dosing precision is tightly   for the pump motor. The dosing unit is now successfully in operation in China – and the company reports that it is more than  


Wim van der Kolk is with Suurmond. www.suurmond.com


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