56
GROUNDWORKS
authority specification. Each station is constructed individually and to site-specific drawings. The chamber well is built using concrete rings and engineers then place the pipework and valve assemblies in situ. Adoptable pumping stations can be utilised in multiple housing developments as well as commercial properties. In order to achieve adoption, a pumping station’s speci- fication, build and installation must be compliant with the relevant local water company requirements. This means they have to comply with the current require- ments of ‘Sewers for Adoption’ – the standard set for the design and construction of sewers in the UK – before being adopted by the local water company. This process can in turn result in longer lead times. Selecting a good pumping system is criti- cal to its longevity and performance, and specifiers will be required to supply a range of data about the site, including a series of measurements, materials and capacity.
Operation
When there is an inflow into the pumping station, the level rises. Once the liquid level increases, the start float switch level control
tilts upwards, which sends a message to the control panel to switch the pump on. The pump sends the liquid through the discharge pipe and the level begins to drop. The float switch level control then tilts down, sending a message to the control panel to stop the pump. The level in the discharge pipe falls back, but is prevented from falling further by the non-return valve closing. The cycle continues as the inflow causes the level in the chamber to rise again.
Installation times
A package pumping station usually takes a week to install, while an adoptable pumping station may require three days to install and a further three days to commis- sion in line with a project programme. The installation of a package pumping station involves site excavation and laying of base concrete before the pump chamber is installed into the ground and the pipework connections fitted. Subsequently, the pumping station is encased in concrete. The pumps are then installed into the pump chamber, the electrics are connected and the system commissioned.
Please call 01746 781782 or visit
www.webuildit-ltd.co.uk or
www.bio-pure.com
WWW.ARCHITECTSDATAFILE.CO.UK
ADF MARCH 2017
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