Llwyn On Reservoir Scour Valve Refurbishment
Case
Study
Blackhall

Llwyn-On Reservoir
Scour Valve Refurbishment

Our engineering services team were called in to assess the condemned valves’ condition. After our intelligent approach it was concluded that full refurbishment was possible with the utmost planning and careful consideration to dam safety. The Blackhall team consulted our extensive archives1.

Original drawings, photos and order contract data were retrieved from 1923. Our design team were tasked with bringing the valves up to modern day standards using the latest material specifications. New patterns were commissioned for the internal plunger and the internal gear mechanism was re-engineered and manufactured, in advance of the valve returning to the factory.

Meanwhile, back on site our service engineers installed a complex lifting and track system to extricate the valve from the 350m tunnel. Competent project management was essential in ensuring critical deadlines were met. The valves were returned back to Brighouse for a full upgrade and subsequently returned to site for their successful re-installation and commissioning.

The project was a resounding success and went on to be presented at the British Dam Society conference. Dr. Andy Hughes2, who co-wrote and presented the paper, comments; “Blackhall are the only company who were bold enough to take on a project of this magnitude. Their success is testament to their unique skills and extensive experience.”

1. Blackhall acquired the Intellectual Property from Blakeborough Valves in 1989.
2. Dr. Andy Hughes is a Professor in Dams & Reservoirs.

“Blackhall are the only company who were bold enough to take on a project of this magnitude. Their success is testament to their unique skills and extensive experience.”

Dr. Andy Hughes
Professor, Dams and Reservoirs