BOC Edwards 18B4B, Instruction Manual, Page: 45 / 62

Feb 04 Issue A
18B4B Vapour Booster Pumps
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5.6.3 Clean the main pump components
Use the following procedure to clean the top cone
assembly (45), ‘T’ piece (38) and guard ring (2):
1. Refer to Figure 1. Inspect the interior of the
components. If there are solid deposits of pump
fluid, use an ultrasonic cleaning bath to remove
the deposits.
2. Use a cleaning solution (suitable for the pump
fluid used) to clean the components.
3. Wash the components with acetone to remove
all traces of the cleaning solution.
4. Bake the components to 77
o
C to remove the
acetone. Alternatively, pass warm air over the
components.
5. Inspect all sealing faces and check that they are
free from scratches. Refinish sealing surfaces
that are scratched.
5.6.4 Clean the interior components
Refer to Figure 1 and use the following procedure:
1. Clean the interior jet stages components (5, 6,
35, 42 to 45, 47) in a degreasing tank.
Alternatively, wipe down the components with
a suitable paraffin based cleaning solution:
• Pay particular attention to the jet formation
areas (that is, items 43, 44 and 47, and the
tops of items 5, 6 and 42).
• If there are solid deposits on the components,
use an abrasive pad to remove the deposits.
2. Clean the backing baffle assembly (18): use the
methods described in Step 1 above.
5.6.5 Clean the boiler and fluid return pipes
Refer to Figure 1 and use the following procedure:
1. Undo and remove the four screws which secure
the cleaning port access lid (11) to the boiler
covers, and remove the lid.
2. Undo and remove the M10 nuts which secure
the cleaning port cover (10) to the boiler, then
remove the cover.
3. Remove the cleaning port gasket, then dispose
of it: refer to Section 6.2.
4. Place a suitable container under the fluid drain
connection (29), to collect any cleaning
solution.
5. Support the boiler assembly (33) and tilt it
slightly towards the fluid drain connection.
(Refer to Section 2.3 for the mass of the boiler
assembly.)
6. Pour a suitable paraffin based cleaning solution
into the boiler (33) (alternatively spray the
solution under pressure into the boiler),
directly through the cleaning port, through the
‘T’ piece (38) and through the jet stack fluid
return pipe (34).
7. Check that the cleaning solution drains into the
boiler without obstruction.
8. Use a suitable flexible rod to clean any deposits
from the jet stack fluid return pipe (34).
9. Clean the condenser fluid return pipe (20): use
the method in Steps 4 to 6 above.
10. Inspect the side cone assembly (14): remove
any deposits and flush out with cleaning solution
if necessary.
11. Inspect the interior of the boiler (33). If there
are still hard deposits on the body of the boiler,
do not try to remove these mechanically;
instead, use an ultrasonic cleaning bath to clean
the boiler.