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KEEPING THE PRESSURE ON

Posted: Thursday 3rd April 2008

One of the most advantageous devices in water engineering, the self-tapping ferrule off-take, speeds up the connection of buildings to the distribution system. It avoids isolating the supply and installing a conventional tee fitting, yet most self-tapping off-takes also introduce a flow restriction and pressure drop.

Head losses typically result from a design compromise. The cutter assembly produces a hole in the pipe effectively, retaining the coupon and any swarf but it presents an obstruction to the flow of water through the ferrule.

To overcome the problem and maximise pressure at the point of use, GPS PE Pipe Systems have introduced the Protecta-Line® self-tapping ferrule off-take. While minimising head losses, the design also maintains water quality in contaminated ground, enabling the ferrule to integrate fully with the Protecta-Line® pipe system for drinking water supply.

GPS PE Pipe Systems incorporated larger-than-average DZR brass, nitrile rubber-sealed, gunmetal cutter and sleeve assemblies, together with an optimised geometry stem and banjo. A self-locking insert sleeve, for the tapped hole, securely clamps the fitting base to the pipe crown and an integral seal positively isolates the barrier pipe’s aluminium layer from the drinking water. The Protecta-Line ferrule is available in all sizes 63mm to 180mm with either a 25mm or 32mm outlet.

GPS PE Pipe Systems
St Peter’s Road
Huntingdon
Cambridgeshire
PE29 7DA




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