KSB Amarex N, Operating Manual

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4 Description of the Pump (Set)
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Amarex N
4.4 Design details
Design
▪ Fully floodable submersible motor pump
▪ Not self-priming
▪ Close-coupled design
Drive
▪ Three-phase asynchronous squirrel-cage motor
▪ Motors integrated in explosion-proof pump sets are supplied in Ex d IIB type of
protection.
Shaft seal
▪ Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
Impeller type
▪
Various application-oriented impeller types
Bearings
Standard bearings:
▪ Grease-packed bearings sealed for life
▪ Maintenance-free
Reinforced bearings (optional, only for S impeller)
▪ Amarex N S 50-172, motor version YL / motor size and number of poles 002, 012,
022
▪ Amarex N S 50-222, motor version YL / motor size and number of poles 032, 042
Pump-end bearings:
▪ Grease-packed bearings sealed for life