Amarex KRT series, Installation And Operating Manual, Page: 20 / 124

4 Description of the Pump (Set)
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Amarex KRT
Function The fluid enters the pump axially via the suction nozzle (6) and is accelerated
outward by the rotating impeller (7). In the flow passage of the pump casing the
kinetic energy of the fluid is converted into pressure energy. The fluid is pumped to
the discharge nozzle (2), where it leaves the pump. The casing wear ring (1) prevents
any fluid from flowing back from the casing into the suction nozzle. At the rear side
of the impeller, the shaft (4) enters the casing via the discharge cover (3). The shaft
passage through the cover is sealed to atmosphere with a shaft seal (8). The shaft
runs in rolling element bearings (9 and 10), which are supported by a bearing bracket
(5) connected to the pump casing and/or discharge cover.
Sealing The pump is sealed by two bi-directional mechanical seals in tandem arrangement.
A lubricant chamber in-between the seals ensures cooling and lubrication of the
mechanical seals.
Cooling system Pump sets of installation types K and D feature an integrated motor cooling system.
The heat generated by the motor is transferred via the discharge cover to the fluid
handled by internal circulation. The coolant serves as anti-corrosive and antifreeze
agent, and as a lubricant for the mechanical seals.
4.7 Noise characteristics (for dry installation only - installation type D)
The surface sound pressure level L
pA
4)
equals 85 dB max.
4.8 Scope of supply
A separate name plate is included in KSB's scope of supply. Attach this name plate in
a clearly visible position outside the place of installation, e.g. at the control panel,
pipeline or mounting bracket.
Depending on the model, the following items are included in the scope of supply:
Stationary wet installation (installation types K and S)
▪
Pump set complete with connection cables
▪ Claw with sealing elements and mounting elements
▪ Lifting rope, lifting chain or lifting bail (optional)
▪
Mounting bracket with mounting elements
▪
Base elbow with inspection hole
5)
and fastening elements
▪
Guide cable / guide rail
(guide rails are not included in KSB's scope of supply)
Stationary dry installation (installation type D)
▪ Pump set complete with connection cables
▪ Base elbow with inspection hole
6)
and fastening elements
▪ Optional: intake elbow with inspection hole
4.9 Dimensions and weights
For dimensions and weights refer to the general arrangement drawing/outline
drawing or data sheet of the pump set.
4) Surface sound pressure level to ISO 3744
5) For nominal discharge nozzle diameter ≥ DN100
6) For nominal discharge nozzle diameter ≥ DN100