That the purpose of the installation of pumps include:
a. Installation of pumps in horizontal / vertical / inclined
b. Installation of pumps in the dry / wet
c. Installation of pumps in parallel / series
But in the following article will only discuss the installation of pumps in parallel and series along with the consequences alone.
a. Installation of pumps in parallel
Installation parallel is often done because reviewing some very important factors, among others, energy savings in first mover, and others in order to achieve optimum operation. In general, the installation of pumps in parallel are used two or more pump type, size and type of the same technical data. Examples are often found are: Installation of pumps in parallel with half the capacity, and the addition of a pump unit to increase capacity because of the increased need for fluid.
Installation of parallel pumps with a capacity of half (parallel to the two pump units).
Of planning we had to calculate and obtain the curve of the system (line pipe properties).
From the picture above, which need to be considered in determining the pump unit is as follows:
1 At the time only one unit that works the pump working point of the pump will change its capacity will increase and will decrease headnya not the same as when the two pump units work. Therefore, we must determine that the pump can be recommended and guaranteed by the manufacturer for the pump to work at the point-point work in accordance with the system curve and the pump curve.
2 To use a pump that has a steep curve, the nature of that capacity will be achieved for the two pump units operating in parallel is greater than the pump with the built ramps turtles.
3 To determine the amount of the first driving force that will be the basis for calculating the power needed by the pump is at maximum power.
The addition of the pump unit on the system due to an increase in demand with no change in the plant pipe held.
From the picture above we need to consider are as follows:
1 That with the addition of a similar pump unit and have the same technical data, the results of parallel operation of two pump units will not reach twice the capacity achieved by the pump unit operates primarily for the pump curve with the built ramps. Usually for the pump with the built-curve ramps are not recommended for parallel operation.
2 To add a pump units that have different technical data that we have to pay attention to re-curve system, not to the pump which has been installed can not function optimally. See the picture below.
b. Installation of pumps in series
the pump operating in series, pump 1 and pump 2 will result in head H1 + 2 with summation head. Pumps are installed in series with a lot of advantages, especially for the system curve and the system curve pump steep ramps. Pda first time running the pump must be run prior to reaching the pressure and stress that enough, if there was no trouble on cavitation. Conversely when the pump shut off, reverse the sequence that should be done. Surely a better use pump with multiple impeller if it is still possible because it would be cheaper and more efficient as well as both technical.
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