BSEE


Last year’s exceponal hot, dry weather led Essex & Suolk Water to supplement the exisng infrastructure for a village north of Norwich by recommissioning a disused pumping staon that had been out of service for 40 years, and Sykes Pumps was brought in to provide a temporary pumping soluon


year. East Anglia is always the most vulnerable to water shortages during a heatwave, which means that Essex & Suffolk Water, a water company in the region, is constantly mindful of the need to put in place robust contingency plans to ensure continuity of supply.


A Contingency challenge


Under normal conditions, the nearby pumping station at Belaugh provides 27 mega litres of water per day to Ormesby WTW, supported by abstraction from the Trinity Broads. The challenge for Essex & Suffolk Water was to maintain this level of capacity in the supply network, despite reduced rainfall, operational constraints and increased demand.


Essex & Suffolk Water secured permission from the Environment Agency to resume abstraction from the area’s main natural water source, the River Bure. This could only be done with the required infrastructure, which meant reactivating the disused pumping station at Horning. After 40 years of inactivity, however, the existing pumps at this asset could not be used due to their age and state of repair. Consequently, Essex & Suffolk Water’s contractor, Integrated Water Services, contacted Sykes Pumps to discuss a pumping solution that could abstract the two to three mega litres of water they estimated would be required to supplement the supply from Belaugh. The solution would need to use the existing pumping station while overcoming the need to reactivate the existing pumps.


Flexible solution


uThe temporary pumping soluon was installed by Integrated Water Services with the support and advice of Sykes Pumps


“One of the challenges of the brief,” explains Mark Burden from Integrated Water Services, “is that we didn’t know how hot it was going to get or for how long. Not only did this make the amount of water coming into the system unpredictable but it also made it hard to assess how much strain additional consumption would put on the network. Our aim was to generate an additional two to three mega litres of water per day; we didn’t want to take more than was required yet had to be able to ensure continuity of supply.”


fter the cold snaps of winter, it’s easy to forget just how hot and dry our climate became over the summer months last


PUMPS Supporting continuity of water supply strategy


The Sykes Pumps team visited site to carry out a full site audit and assist with calculations so that a detailed specification could be drawn up. It was important that the temporary solution could be deployed as quickly as possible to maintain resilience in the water supply network so the Sykes Pumps team not only needed to advise on the type and size of pumps required, but also on selecting a location for the pumps for optimum efficiency. Moreover, as Integrated Water Services was dealing with several unknowns, the temporary pump specification also needed to offer sufficient flexibility to adapt to an evolving situation. Explains Sykes Pumps’ hire manager, Rob Richards: “The customer wanted a robust solution that would allow them to increase capacity quickly if the situation escalated. Our response was to provide two duty pumps and a standby, along with two fuel cubes and all the hoses, flanges and accessories needed to connect up the temporary pumps with the existing pumping station infrastructure, adapting the fittings where required to align the temporary pumps to existing connections.”


Tailored installation


Sykes Pumps supplied a super-silenced UVO 150/100E diesel driven pump as the main duty pump; a high performance pump that can provide a maximum head of 93 metres and flows of up to 120 litres per second. The pumpset incorporates the Sykes ‘Univac’ vacuum priming system, utilising a 25cfm rotary vacuum, which enables rapid automatic priming and re-priming from dry. This pump offered both quiet operation and fuel efficiency. The UVO 150/100E was installed alongside two Sykes UVO 200/150F (D90) pumps, each of which provided a maximum head of 135 metres and a flow of 375 litres per second. This configuration enabled the level of water abstracted from the River Bure to be minimised if the need to put additional water into the supply network was less severe, but ensured that more water could be pumped into


22 BUILDING SERVICES & ENVIRONMENTAL ENGINEER APRIL 2019


the network quickly should there be both a significant rise in demand and increased issues with lack of rainfall. Burden continues: “We were planning for a worst case scenario but the combination of pumps and the design of the solution meant that we were able to use it in a best case scenario way, reducing the abstraction required from the river. Originally, one of the UVO 200/150F (D90) pumps was specified as a duty pump but we were able to keep this on standby and only use the smaller pump.”


While the duty pump was a six-inch pump, Sykes Pumps adapted the set up to use eight-inch hoses so that everything on site was standardised. The pumps were connected using 200mm wire armoured suction hoses with bauer couplings to abstract the water and 200mm high pressure flanged discharge hoses to feed the abstracted supply into the network. Rob Richards explains: “Three suction hoses per pump were designed to pump the water out of the pumping station chamber supplied by the river and a 23m flanged high pressure hose connected the pumps to the nearest point on the raw water main to Ormesby WTW.


“The existing pipework connections were 450mm so we also supplied a number of gate valves, non-return valves, adapters, reducers, bends and Y pieces to enable secure and leak- free connection to the 200mm hoses.”


Ample contingency


The temporary pumping solution was installed by Integrated Water Services with the support and advice of the Sykes Pumps team, who assisted with connecting up the pumps. Burden concludes: “The water shortage was not as severe as we thought it might become but having plenty of contingency was the right choice. With Sykes Pumps’ help we were able to bring a Water Company asset that had been out of use for four decades back into service.”


www.andrews-sykes.com Read the latest at: www.bsee.co.uk


uSykes Pumps supplied a supersilenced UVO 150/100E diesel driven pump as the main duty pump


‘


The water


shortage was not as severe as we thought it might become but having plenty of conngency was the right choice


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