Pump sizing for Sewerage Lift Station
Pump sizing for Sewerage Lift Station
(OP)
We have just finished sizing the pumps for a sewerage lift station. The static head is approximately 40 meters water pressure gauge. The pump delivers approximately 19.8 litres per second.
The friction loss is approximately 5 meters water pressure gauge. In theory, the pump must overcome at least 45 meters water gauge pressure.
We selected a pump with a total dynamic head of 50 meters water pressure gauge. Is the maximum pump discharge pressure too close to the system pressure? Do you think that after say 1 year of operation, the system pressure can increase due to factors such as say soiling on the internal surface of the pipe? Too large a pump is inefficient. Are there any standards that provide a guide on how much greater the pump's TDH should be above the system pressure?
The friction loss is approximately 5 meters water pressure gauge. In theory, the pump must overcome at least 45 meters water gauge pressure.
We selected a pump with a total dynamic head of 50 meters water pressure gauge. Is the maximum pump discharge pressure too close to the system pressure? Do you think that after say 1 year of operation, the system pressure can increase due to factors such as say soiling on the internal surface of the pipe? Too large a pump is inefficient. Are there any standards that provide a guide on how much greater the pump's TDH should be above the system pressure?





RE: Pump sizing for Sewerage Lift Station
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RE: Pump sizing for Sewerage Lift Station
It is worthwhile calculating 1, 2 or even 3 system curves for the hydraulic requirements of the station, ie 1.) new condition 2.)fouled pipe line and 3.)any anticipated increased demand.
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Pump sizing for Sewerage Lift Station
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