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saett och anordning foer automatisk cirkulation i avloppspumpstationer
saett och anordning foer automatisk cirkulation i avloppspumpstationer
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机译:污水泵站自动循环的装置和装置
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摘要
In the outlet (5) from a pump unit (4) a valve (7) is provided which opens a outlet (9) between the pump outlet (5) and the bottom of the pumping station (1). The valve (7) is controlled electrically or hydrostatically for a predetermined time at the commencement of each pumping operation to disturb and mix-up the sludge with the pumped liquid. IMAGE
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