WEIRBULLETIN | AUGUST 2011 FEATURE MINERALS OIL & GAS POWER & INDUSTRIAL


Subway success for Envirotech Peristaltic Pumps


Envirotech Peristaltic Pumps from Weir Minerals Canada have been selected to pump cement for lining the new underground metro extension in the City of Toronto, Ontario, Canada.


It all started two years ago when the


world’s largest peristaltic hose pump manu- facturer turned down the application as being impossible. Lovat (a company of Caterpillar) who manufacture tunnel boring machines, re- quested Weir Minerals Canada to take a look at pumping a mixture of sand, fly ash, cement and water – 90% solids by weight. A sample of the mixture was successfully tested using the Envirotech Peristaltic pump and the first pumps to be supplied were


installed on Lovat boring machines destined for Spain.


The line is being manufactured in Weir Minerals Canada’s plant in Mississauga, On- tario, the business currently has orders from Canada, USA, Mexico, Chile, Peru, Singapore and the Netherlands.


How pump technology is protecting fish


Final checks are made to fish pumps before leaving the plant


With the continuously dwindling fish population in Canada over the last two decades, the Ministry of Fishery and Oceans introduced new protective regulations. The rules mean that infrastructure such as power plants, water treatment plants and pumping stations cannot kill fish in pumps and turbines. Enter Weir and its partner of 26 years,


Hidrostal AG. Hidrostal holds the unique technology of Screw Centrifugal Pumps used to handle viscous, stringy liquids and sludge.


The pumps are assembled and tested at Weir Minerals Canada and at Weir Specialty Pumps in Salt Lake City, Utah. Wemco-Hidrostal Live Fish Pumps provide the answer to stopping local authorities and companies getting caught in the regulator’s net. The pumps are becoming the preferred choice of several municipalities and power companies, achieving a fish survival rate of 94- 100%, depending on the fish species. The most recent shipment from Weir


Minerals Canada’s plant is destined for Pattulo Drainage pumping station in Surrey, British Columbia, Canada. The project includes three 20” pumps complete with submersible motors. Europe has also now introduced simi-


lar environmental measures to protect fish. Hidrostal AG, headquartered in Neunkirch, Switzerland has invited the Weir companies to share their experience with Hidrostal’s newly organised live fish pumping committee.


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