4.4
Design details
Design
▪
Fully floodable submersible motor pump
▪
Not self-priming
▪
Close-coupled unit
Impeller type
▪
Various, application-based impeller types
Shaft seal
▪
Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
Standard bearing assembly
▪
Grease-packed bearings sealed for life
▪
Maintenance-free
Reinforced bearing assembly (optional)
Pump-end bearing:
▪
Grease-packed bearing sealed for life
The following hydraulic system/motor combinations can be equipped with a
reinforced bearing:
Table 7: Reinforced bearing
Hydraulic system
sizes
Motor size and number of poles
50-172
002, 012, 022
50-222
032, 042
Drive
▪
Three-phase asynchronous squirrel-cage motor
Explosion-proof pump sets comply with type of protection Ex d IIB.
4.5
Types of installation
Two design variants are available, depending on the installation type:
▪
Stationary wet installation (type of installation S)
▪
Transportable wet installation (type of installation P)
The pump set is designed for continuous operation in submerged condition. The
motor is cooled by the fluid handled on the motor surface. Operation with the motor
outside the fluid handled is possible for short periods.
4 Description of the Pump (Set)
Amarex® N
15 of 66
Goodnal STP ST041 Biological Treatment (KSB WAS PUMP 1 & 2 PU-0530-010 OM Instructions) Vendor Manual
Q-Pulse Id VM381
Active 29/10/2013
Page 17 of 76
