4.5
Configuration and function
1
2
3
4
5
6
7
8
9
10
Fig. 2: Sectional drawing of Vitastage
1
Suction nozzle
2
First impeller
3
Stage casing
4
Diffuser
5
Last impeller
6
Discharge casing
7
Motor
8
Shaft seal
9
Discharge nozzle
10
Pump foot
The pump is installed in either horizontal or vertical position. It is designed with an
axial fluid inlet and a radial fluid outlet. The hydraulic system is fitted on an
extended motor shaft and the casing is directly bolted to the motor.
The fluid enters the casing via the suction nozzle (1) and is accelerated outward in a
cylindrical flow by the first impeller (2). At the flow contour of the stage casing (3)
the kinetic energy of the fluid is converted into pressure energy and the fluid is
routed to the next impeller (11) via the diffuser (4). This process is repeated in all
stages until the fluid has passed the last impeller (5). The fluid then passes through
the discharge casing (6) to the discharge nozzle (9), where it leaves the pump. The
drive shaft enters the casing at the rear of the last impeller (11). The motor (7) is
bolted to the casing. The shaft passage through the casing is sealed with a dynamic
shaft seal (8). Pumps installed horizontally are mounted on motor feet, whereas
vertically installed pumps are mounted on a pump foot (10).
The pump is sealed by a standardised mechanical seal.
4.6
Noise characteristics
Table 7: Surface sound pressure level L
pA
2)
Size
Motor rating
[kW]
Noise characteristic
[dB]
VS 05/1
1.5
69-70.2
VS 05/2
1.5
69.5-71
VS 05/3
2.2
69-71.4
Design
Function
Sealing
2)
Measured at a distance of 1 metre, 1.6 metres above the installation surface
4 Description of the Pump (Set)
Vitastage
15 of 44
