MATERIALS HANDLING
proves its worthPERISTALTIC PUMP R
ecently, a water treatment facility in the USA needed a new pump to feed sodium hypochlorite under high pressure into
its post-chlorination cycle. The previous diaphragm-metering pump had serious locking that shut down the pump. After replacing the diaphragm pump with the new peristaltic Qdos 20, which is reduced downtime. Simultaneously, the possible to avoid any chemical spills when replacing the line. Victoria in Minnesota has around 8,800 inhabitants and is located in Carver County. Residents here are supplied with drinking water from three groundwater wells. About 10 years ago, a water treatment facility was constructed to treat iron and manganese present in the water. Here, several chemicals are used sodium hypochlorite, polyphosphate and sodium permanganate.
OFF-GASSING ISSUES The diaphragm pump used to meter sodium hypochlorite at the post- chlorination stage was experiencing According to Clark Corbett at Vessco, Victoria’s chemical feed equipment supplier, this is a common problem in such applications. “The original gassing to the point where bubbles were getting into the diaphragm and vapour locking it, so the pump stopped working,” he explains. According to Corbett, there were very few options when it came to sourcing a replacement pump that could deal with the application, which runs at relatively
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The Victoria plant now aims to use the latest Qdos technology for all of its chemical metering tasks
However, he pointed the water treatment works to a brand new technology, the Qdos 20 peristaltic metering pump from Watson-Marlow Fluid Technology Group Peristaltic pumps have no valves, seals
water treatment. Importantly, the Qdos 20 ReNu pumphead features a tube pressure sodium hypochlorite applications.
ONE-YEAR TRIAL The Victoria plant ran a Qdos 20 trial model for more than a year – only replacing the ReNu pumphead once in that time. Operating at between 4.8 and signal, the Qdos 20 pump considerably reduced maintenance downtime. As a result, the plant is currently in the process of replacing the trial model with a production unit. Water plant operator Brady Lee says:
“We like these pumps a lot. Maintenance is fast and simple, while controlling the change is very straightforward.”
Case study highlighting how a new pump is reducing maintenance at a water treatment plant in the USA
The Qdos 20 is inherently designed
to reduce maintenance. For example, the ReNu pumphead features an integrated to protect it in the event of any type of failure. Moreover, if the tube fails, operators just quickly and safely replace one component, the pumphead, without the need for tools or special skills. The new pump has been developed to
is especially suitable for applications at the well sites of many smaller water treatment plants, where operators are often injecting into water lines at higher pressure.
SMALL PLANT FLEXIBILITY “Water applications need a reliable feed for chemicals, and it is especially important to keep sodium hypochlorite running,” explains Corbett. “The Qdos 20 addresses the needs of small plants towns tend to have limited maintenance personnel. With this technology, they only need to replace the pumphead, a low-cost disposable part.” Another feature appreciated by the plant is that the line can be replaced without spilling any chemical left in the tubing, a highly important safety feature considering that sodium hypochlorite used for this type of application is extremely corrosive. The Victoria plant is considering acquiring a second Qdos 20 pump for its pre-chlorination sodium hypochlorite application. Also being contemplated is replacing a diaphragm pump used to meter permanganate. The long-term aim is to use Qdos technology for all of the plant’s chemical metering applications
For more information visit
www.wmftg.com
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