Belle Greve Pumping Station is undergoing an upgrade to prolong its lifespan, work started in 2008 and it is crucial to the island's future sewage management programme. T-T Flow were approached by the principal contractor working on behalf of Guernsey Water, because three DN600 wedge gate valves had previously been supplied a few years ago by a framework manufacturer, which had heavily corroded due to being in a saltwater environment.
The corroded wedge gate valves play a crucial role in controlling the flow and therefore it was vital they were sufficiently working as soon as possible. Following extensive discussions between T-T Flow and themselves to ascertain hydraulic parameters and installation characteristics, T-T Flow proposed a solution and secured an order to supply three replacement DN600 gate valves that would stand these arduous conditions. T-T Flow were able to do this by upgrading the seat and spindle nut material to aluminium bronze and, spindle in super-duplex stainless steel. The ductile iron bodied valves were triple coated in a marine grade-two-pack resin to greater than 800 microns, to ensure the valves were fully protected from the conditions.
The work ran satisfactory for both parties and hopefully they will be able to do work together in the future.