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1.3.8 The SE pump
The SE pump is used for pumping wastewater, water containing sludge and
solids. The pump is unique in the wastewater market because it can be in-
stalled submerged in a waste water pit as well as installed dry in a pipe sys-
tem. The series of SE pumps contains both vortex pumps and single-channel
pumps. The single-channel pumps are characterised by a large free passage,
and the pump specification states the maximum diameter for solids passing
through the pump.
1.3.9 The SEG pump
The SEG pump is in particular suitable for pumping waste water from toi-
lets. The SEG pump has a cutting system which cuts perishable solids into
smaller pieces which then can be lead through a tube with a relative small
diameter. Pumps with cutting systems are also called grinder pumps.
1.4 Summary
In this chapter, we have covered the principle of the centrifugal pump and
its hydraulic components. We have discussed some of the overall aspects
connected to design of the single components. Included in the chapter is
also a short description of some of the Grundfos pumps.
Figure 1.30: SE pump.
Figure 1.31: SEG pumps.
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