7.5.6
Fitting the bellmouth
7.5.6.1
Fitting the bellmouth for pressure class A
Fig. 25: Impeller of pressure class A
✓
Bellmouth 138 has been positioned on wooden supports on a level and solid
surface.
✓
Suitable hoisting tackle is provided.
✓
The pump set has been completely pre-assembled.
✓
A new casing wear ring 502 has been fitted in bellmouth 138.
1.
Attach a lifting accessory to eyebolts 900.
2.
Carefully pull the pump set upright by means of the lifting accessory and
hoisting tackle.
3.
Center the pump set above bellmouth 138.
Note: Make sure that the pin of bail 571 for attaching the lifting tackle and the
baffles in bellmouth 138 are aligned in the same direction.
4.
Slowly lower the pump set. While lowering the pump set, make sure that studs
920.01 are aligned with the drilled holes.
5.
Lower the pump set until it sits on bellmouth 138.
6.
Fasten all studs 902.01 with corresponding nuts 920.01 and discs 550.01.
Observe the tightening torque!
7.
Close the threaded holes with screw plugs 903.05.
Table 15: Diameter of the casing wear ring
Type series
Nominal diameter
[mm]
Nominal diameter
[inch]
700 - 470
470 + 0.1
18.504 + 0.004
800 - 540
540 + 0.2
21.256 + 0.008
900 - 540
540 + 0.2
21.256 + 0.008
1000 - 700
700 + 0.3
27.559 + 0.012
1200 - 870
870 + 0.3
34.252 + 0.012
1500 - 1060
1060 + 0.3
41.732 + 0.012
7 Servicing/Maintenance
Amacan P
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