4.4
Design details
Design
▪
Fully floodable submersible motor pump
▪
Not self-priming
▪
Close-coupled design
Impeller type
▪
Various, application-based impeller types (
Shaft seal
▪
Two bi-directional mechanical seals in tandem arrangement, with liquid reservoir
▪
Reinforced bearings with leakage chamber
Standard bearing assembly
▪
Grease-packed bearings sealed for life
▪
Maintenance-free
Reinforced bearing assembly
Motor-end bearing:
▪
Grease-packed bearings sealed for life
▪
Maintenance-free
Pump-end bearing:
▪
Grease-packed bearings sealed for life
▪
Re-lubrication possible
The following hydraulic system/motor combinations have reinforced bearings:
Table 7: Reinforced bearings
Size of
hydraulic
system
Motor size and number of poles
372
552
554
504
654
D 80-315
X
X
-
-
-
D 100-315
X
X
-
-
-
D 150-400
-
-
X
X
X
D 150-401
-
-
-
X
X
D 200-400
-
-
-
X
X
D 250-400
-
-
X
X
X
Drive
▪
Three-phase asynchronous squirrel-cage motor
Explosion-proof pump sets are supplied with an integrated motor of Ex d IIB type of
protection.
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)
16 of 74
Amarex KRT
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 18 of 96