Table of Contents
Advertisement
4
For activated sludge or fluids containing long fibres
7 Servicing/Maintenance
230
502
903.06
914.07
Fig. 44: Impeller of pressure class B
ü Bellmouth 138 has been positioned on wooden supports on a level and solid
surface.
ü Suitable hoisting tackle is provided.
ü The pump set has been completely pre-assembled.
ü A new casing wear ring 502 has been fitted in bellmouth 138.
1. Attach the lifting tackle to bail 571 and carefully pull the pump set upright.
2. Centre the pump set above bellmouth 138.
Please note: Make sure the attachment pin of bail 571 and the ribs in bellmouth
138 are aligned in the same direction.
3. Slowly lower the pump set. While lowering the pump set, make sure that studs
920.01 are aligned with the drilled holes.
4. Then lower the pump set until it sits on bellmouth 138.
5. Fasten all studs 902.01 with corresponding nuts 920.01 and discs 550.01.
Observe the tightening torque! (ð Section 7.8, Page 75)
6. Close the threaded holes with screw plugs 903.05.
7. Loosen the impeller nut to adjust clearance gap "A" between impeller 230 and
casing wear ring 502.
8. Use a sensor to check that the required clearance gap "A" is met, see the
following table.
9. Align the holes of impeller 230 and impeller nut 922 and fasten them with
hexagon socket head cap screw 914.07.
Table 23: Clearance gap "A"
Pump size
500 - 270
600 - 350
7.6.7 Leak testing
7.6.7.1 Testing the lubricant reservoir for leakage
After reassembly, the mechanical seal area/lubricant reservoir must be checked for
leakage. The leak test is performed at the lubricant filler opening.
Amacan P
112
902.01
920.01
550.01
138
901.01
922
Standard
Large clearance gap
A [mm]
--
0.35
4)
A [mm]
--
0.9
73 of 112
Advertisement
Table of Contents
