Water & Wastewater Treatment

PUMP CENTRE CONFERENCE & EXHIBITION 2014 PREVIEW 13 during Spring Freshet (Canada's annual thaw-flood events) as well as storm events within the catchment area. In addition the existing pumping station is believed to have been respon- sible for significant fish mortalities. Bedford Pumps have supplied three submersible axial pumps from their SAF Fish Friendly range. Each pump is fitted with Bedford Pumps' innovative Fish Friendly impel- ler which enables the fish to pass through the hydraulic passages unimpeded. The design of the SAF pumps, in addition to protecting the fish, also demonstrates a significant improve- ment in hydraulic efficiency, resulting in an 8% reduction in power absorbed. Bedford Pumps' standard range of Fish Friendly pumps cover from 400 to 7,000l/s at 2 to 6m head and are avail- able as a submersible or direct drive variant. They are ideally suited for land drainage, flood defence and fish farm applications. Larger capacity pumps can also be designed to meet specific requirements. Stand S2 The SAF range of pumps have been rated as 'Excellent' in a trial designed to assess their ability to comply with EU legislation brought into force to tackle the rapid decline in global populations of the European Eel. The rigorous tests were performed by VisAdvies, an independent research consultancy in the field of water management focusing on the environment of fish in all types of inland waterways, in a dry dock in the Netherlands. They performed the evaluation by means of forced exposure of the fish to the pump. Three representative groups of fish were used, in two size classes, 0-15cm and 16cm plus. The pump was tested at a duty of 1,300l/s at 1.5m head, running at speeds of 330, 425 and 518rpm consecutively. The three pumpsets will each provide a duty of 2700l/s at 5.25m head. Fish Friendly SAF pump on trial in Holland PUMP TRIALS ↖ Solid Disc Type ZB • High speed, non-slam check valve design • Fastest speed of response of any check valve • Eliminates reverse flow to pumps • Minimises over-pressure surge (water hammer) • Only check valve design to work equally well when installed vertically or horizontally • Low seat leakage • No maintenance requirements NOZZLE CHECK VALVES FOR THE WATER INDUSTRY Ring Disc Type NK www.checkvalves.co.uk

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