Radial clear-
ances (mm)
new
min. 0,15 0,17 0,20 0,22 0,25
max. 0,19 0,22 0,24 0,27 0,30
worn
0,78 0,85 0,90 1,05 1,15
Axial
clearance a
(mm)
new
0,8 - 1,2
worn
max. 1,7
When the wear limits has been reached or exceeded, the worn parts must be replaced.
For volute casings (102V) with a wear ring (502.11) and cover casings (161) with a wear ring (502.31)
there are the following possibilities to restore the correct clearance:
1.
Renew impeller (230) and wear ring. Then the original measures are restored.
2.
A customized wear ring (bored to fit) can be supplied to avoid replacement of the impeller. Please
contact factory for details.
When volute casing (102V) or casing cover (161) without wear ring must be repaired, a wear ring can be
installed to renew pump performance. Re-machining of the volute casing and / or casing cover is re-
quired. Please contact the factory for details and assistance.
7.1.14 Reassembly
7.1.14.1 Mounting
1.
Re-assemble the pumps using the reverse order of steps as completed for pump disassembly.
However the following observations should be considered:
•
Pay attention to the utmost cleanliness when re-assembling the pump.
•
For tight tolerances e.g. between stub shaft (210) and motor shaft or impeller (230) and
shaft (210), as well as thread, use suitable anti-galling compound (e.g. Molykote / Never-
Seeze), so that the next mounting and dismounting will be easier.
NOTICE:
Anti-galling compound must be compatible with the pumpage.
Screws should be tightened, with the following torque:
Location
Screw
Size
Screw torque in Nm
Lubricated
threads
Dry threads
Casing screws
M12
35
50
M16
105
150
M20
210
305
All other screws
M10
35
50
M12
60
90
M16
150
220
Do not use excessive force.
2.
For mounting of stub shaft refer to
Mounting of Stub Shaft
.
3.
For mounting of mechanical seal refer to separate "Mounting Instruction of Shaft Sealing" and
7.1.10 Removal of Impeller on page 36
4.
For impellers with back vanes the axial clearance between the back vanes and the casing cover
(161) should be checked after mounting the impeller (230) and tightening the impeller nut (922) (see
Clearance at impellerchapter.
7.1 Maintenance
38
ICB Installation, Operation and Maintenance Instruction
Содержание Goulds Pumps ICB
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Страница 2: ......