KSB Megaflow
26
Fig.24 – Clearance Impeller type E
Pump Size
Clearance (mm)
a
b
80-200
100-250
0,25 + 0,05
1,0
125-315
150-400
200-500
0,45 + 0,05
1,0
Table 12 – Clearances for Impeller type E
15.4.2 Replace of the Volute Casing Wear Plate
Center the impeller through the inner passage hole of the shaft (use cutter block), machining the wear region of the impeller
(hub suction side) until it becomes uniform (machining limit 2 mm of diameter). Measure it after machining.
Then remachine the plate inner diameter according to the impeller measure and following the clearances mentioned at
tables 9 and 10. Extract the damaged plate from the volute casing and set the spare plate with the flat gasket and the
o-ring fixing them in the casing, with screws. (901.2).
Note: The tolerance for radial and axial run out should be at maximum 0,05 mm.
15.6
Dismantling instructions
The numbers indicated in parenthesis, after the name of each part, refer to the part list and to the sectional drawing of
chapter 17.
Due to this modern project, the Megaflow pumps offer maintenance advantages. They can be disassembled from the rear
end, taking out the bearing bracket, discharge cover and impeller without disconnecting the volute casing (102) from the
piping system. In case a spacer coupling type is used, even the drive can be kept in its place during the maintenance works.
15.5.1 Pump with packing: Bearing Brackets CS40, CS50, A30K, A40K, A50K and A60K
Close suction and discharge valves (if any). Drain the pump by removing the threaded plug (903.2)
Disconnect and remove any auxiliary connections. (if any). Remove coupling guard (if fitted). Remove the venting (672).
Remove the threaded plug (903.4) and drain oil from support. Remove the constant level oiler (638) from the support.
If the coupling sleeve has spacer, remove it.
In case there is no spacer, remove the coupling sleeve by moving the drive backwards.
Take the coupling from the pump shaft. Loosen the pump foot fasteners, that fix it to the baseplate. If necessary, undo the
hexagonal head bolts (901.3 or 901.6)
Tight the extractor bolts and all set will be pulled out of the casing. Pressure covers fixed with studs between casing pump
and the bearing bracket do not have extractor bolts.
Set the extractor bolts to their original positions so they do not cause any problem to the assembly.
Edge the set with wood in the balance region.
Lock the shaft by means of using a device put in the region of the shaft key (904.1). Loosen and remove the impeller nut
(922) and the gasket (400.3) Do not damage the gasket.
Take out the impeller (230), the shaft key (940.2) and the gasket (400.1). Undo the hexagonal head bolts (901.6) if existing.
Loosen the nuts (920) and remove the gland cover (452). Extract the discharge cover (163) and the gasket (400.1). Then,
remove the shaft protecting sleeve (524). Remove the thrower (507) and the key (940.1). Loosen the hexagonal head bolt
(901.4), setting free the pump foot (183). By loosening the bolts (901.5), remove the bearing covers (360) and the gaskets
(400.4).
Summary of Contents for MEGAFLOW 100-250
Page 33: ...KSB Megaflow 33 17 3 Execution with K Impeller AK Bearing Bracket Figure 26 ...
Page 34: ...KSB Megaflow 34 17 4 Execution with O Impeller AK Bearing Bracket Figure 27 ...
Page 36: ...KSB Megaflow 36 17 6 Execution with Impeller K O Bearing Bracket P65 160 Figure 27 ...
Page 38: ...KSB Megaflow 38 17 8 Execution with Impeller K and Bearing Bracket P80 200S Figure 28 ...
Page 40: ...KSB Megaflow 40 17 10 Execution with Impeller E Bearing Bracket AK Figure 29 ...
Page 42: ...KSB Megaflow 42 17 12 Execution with Impeller E and Bearing Bracket P65 160X Figure 30 ...