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Manufacturer supplies valves to major water project

INSTALLED BASE 
AVK Valves supplies valves to major water projects across Africa

INSTALLED BASE AVK Valves supplies valves to major water projects across Africa

31st July 2015

By: Bruce Montiea

Creamer Media Reporter

  

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The valves supplied by global manufacturer and distributor AVK Valves to the North–South Carrier (NSC) pipeline project, in Botswana, are meeting all the client’s requirements, says AVK Valves.

The NSC pipeline project – the largest engineering project ever undertaken in Botswana – carries raw water for 360 km from the Dikgatlhong dam to the capital city of Gaborone. Phase 2 of the NSC pipeline project, currently under way, will duplicate the pipeline.

The portion of the project involving AVK Valves, which got under way in September 2013 and ended in June 2014, entailed the supply of wedge-gate valves ranging from 350 mm to 600 mm, and RSV gate valves ranging from 50 mm to 500 mm.

AVK Valves MD Brian McGugan tells Engineering News that the project, which involved a team of five from AVK Valves, was valued at R8-million in total and included the provision of 133 pieces of metal seated flanged gate valves and 184 pieces of resilient seated gate valves, as well as testing all the valves.

McGugan says one of the things that made the task of providing the required valves challenging was the requested delivery period by the contractor, which required that the valves be installed within a short period.

“However, we liaised closely with the engineering consultant, contractor and end-user, from the beginning to when the valves were installed. All our products were manufactured and delivered within the required time, including the nonstandard products,” he says.

AVK Valves also supplied technical suggestions and solutions for the project, McGugan says. Further, the company used loss foam technology to manufacture the valves at its foundry, which contributes to green technology.

Loss foam is economical because manufacturing it involves fewer steps, compared with other forms of foam manufacturing, such as investment casting. Risers are not usually required, owing to the nature of the process, as the molten metal vaporises the foam and the first metal into the mould cools more quickly than the rest, which results in natural directional solidification.

Foam is also easy to manipulate, carve and glue, and its flexibility allows for consolidation of the parts into one integral component.

Edited by Samantha Herbst
Creamer Media Deputy Editor

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