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Submersible motor pump for handling wastewater

 KSB in India has launched Amarex N, a new cost-efficient low-weight pump set which is compact enough to be installed in narrow sumps and tanks. The pump is designed for handling all types of wastewater in municipal, industrial and commercial applications.
Amarex N is available in 7 models ranging from DN 50 to DN100 size, with maximum flow rate of 53 litres per second and a discharge head of up to 49 metres. Standard variant can withstand fluid temperature up to 55 C. The pump will primarily be used in pumped drainage systems, for example where wastewater needs to be drained from below the flood level or in systems with long discharge pipes and insufficient natural slope for gravity drainage.
The pump is equipped with free flow impeller (type F) which can handle solids up to size 100 mm max. An option of cutter impeller (type S) is available in size 50 mm with the free passage of 6 mm to cut any fibrous material in the fluid. It benefits in selection of lower size pump which in turn saves initial investments and running costs. 
The shaft is sealed off towards the motor by a shaft seal ring, and by a bi-rotational mechanical seal at the pump end, so the motor is protected against fluid ingress. A reservoir between the two seals, which is filled with environmentally compatible oil, ensures proper cooling and lubrication of the mechanical seal even if the fluid contains gas. Generously dimensioned ball bearings sealed for life support the stainless steel shaft.

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