Pump; Tightening Torque Of The Screws/Nuts; Tightening Torque Of The Impeller Nuts - KSB AU Manuel D'instructions

- Mount the impeller until it comes into contact with the
shaft sleeve.
- Firmly tighten the impeller nuts.
- Finish mounting the pump.
7.5.4

Pump

Mount the pump in reverse order to when dismounting (see
point 7.4.5)
For monobloc construction.
It is the great importance the correct axial
Note
adjustment of the impeller. This is to say,
proper adjustment of clearance between impeller blades and
wear plate (or to pump casing if it is not fitted with wear ring,).
This clearance has to be between 0,15 and 0,35 mm..
Once the pump mounted and before tightening the
coupling fastener, gently move the pump shaft to non-
motor side until the impeller touches the wear plate (if
fitted) or pump casing (if no wear plate is fitted) . Then
move back slightly pump shaft to the motor side until
clearance stated in over paragraph is reached. Finally
tighten the coupling fastener to fix the position.
A non-existent clearance would cause high
friction between the wear plate and the impeller,
while excessive clearance would increase the
liquid recirculation, with consequent loss of hydraulic
performance of the pump.
Additional observations:
- All the joints intervening in the dismounting of the pump
must be renewed.
- Use the bearings (320) indicated.
- Do not forget to correctly position the thrower (507)
through the window of the cover (161).
- Check the correct location of pieces,
Note
especially the seals and impellers, and
tighten the impeller nuts as shown in the chart in point
7.5.6.
- Do not forget to position all the safety and
protection elements, such as coupling guards,
before starting up the equipment.
The pump materials have been selected in accordance with
the process fluid indicated in the datasheets. If this fluid is
modified, check with KSB ITUR that the new fluid is suitable
for the pump.
7.5.5

Tightening torque of the screws/nuts

Tightening Torque in [N∙m]
ISO Metric
thread (for non-lubricated thread)
M4
M5
M6
M8
M10
M12
M16
M20
M24
M27
M30
7.5.6

Tightening torque of the impeller nuts

Tightening Torque in [N∙m]
Metric
thread (for non-lubricated thread)
M14x1.5
M20x1.5
M27x1.5
M33x1.5
M52x1.5
Steel Stainless steel
3.1 2.15
6.1 4.25
10.4 7.3
25.2 17.7
49.5 34.8
85.2 59.9
211 148
412 290
710 500
1050 750
1420 1000
38
100
250
460
2000
AU
15