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ReNu pump head technology offers accurate and repeatable flow for polymer dosin

12 June 2019

The launch of a new pump head designed for use with the Qdos range of peristaltic metering pumps has been announced by Watson-Marlow Fluid Technology Group.

Qdos 20 with the ReNu PU pump head offers repeatable flow of 28 l/hr at 4 bar (7.67gph at 60psi) for fluids of wide-ranging viscosity whilst metering accuracy is assured to ±1%. 

The launch of the Qdos 20 ReNu PU responds to a growing worldwide demand for polymer dosing systems in wastewater treatment. Most of these systems use polymers to dewater sludge to minimise its bulk, thus reducing the cost associated with the disposal and storage of the cake by up to 75%. Users of the new pump head already reveal significant process improvements for dosing polymers, when compared to diaphragm metering pumps

The ReNu PU pump head is designed to deliver maximum process uptime. This is facilitated by rapid, safe and easy pump head removal and replacement. There is no need for specialist tools and no requirement for specially trained on-site maintenance technicians. 

Moreover, the ReNu PU pump head offers integral leak detection and chemical containment; an important point as cleaning up polymer spillages can be hazardous to operatives and time consuming. 
Customer feedback

A major utility provider on Lake Michigan, Illinois has confirmed the suitability of the ReNu PU for the accurate dosing of polymer flocculants. The company had a requirement to clean-up wastewater run-off from a limestone quarry; installing a Qdos pump fitted with a ReNu PU pump head allowed them to meet water quality standards with a low maintenance, reliable solution. 

A major UK brewery is also able to testify to the pump head’s effectiveness. The brewery used a diaphragm metering pump for polymer dosing. However, the small non-return valve within the diaphragm pump would easily become blocked by the polymer. In turn, the pump would require frequent cleaning, a process made more challenging by the fluid’s high viscosity.

“We don’t have any such issues with the Qdos, which reliably doses polymer for around 12 hours every day,” says Mr Dave Burrows of SUEZ UK, who is responsible for the effluent plant at the brewery. “I really can’t fault the reliability or simplicity of the Qdos pump or the ReNu PU pump head. In addition, when the pump head reaches its end of life, you get a useful notification. Replacement is quick and easy – we’re up and running again with 5-10 minutes.” The Qdos 20 ReNu PU has proved a complete success, with no issues experienced over an extended period.

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