Carver RS A, Инструкция по установке, эксплуатации и обслуживанию

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RS Series – Multi-Stage, Ring Section Pumps January 2001
20
Prepare the pumping unit for disassembly using
the following list:
1. Read this entire section and review the
applicable sectional assembly drawing
and parts list before disassembling the
pump. For cooling options, refer to
Figure 9.
Before attempting to disassemble the
pump, the electrical power supply from
the driver must be locked and tagged in
the “OFF” position to prevent injury or
death to personnel servicing the pump.
2. Stop the pumping unit.
3. Disconnect suction, discharge, and
gauge lines. Disconnect auxiliary
connections, as applicable.
4. Remove coupling guard. Uncouple the
pump from the driver.
caution
Use of a hoist with adequate capacity is
recommended for removing the pump
from the base.
5. Remove the bolts that hold the
pump to the base. Remove the pump
from the base and take to a suitable
work area.
E. Parts Cleaning and Inspection
NOTE
Mark or number each component while
dismantling according to sequence.
IMPORTANT: Check for shims between
impellers and spacer sleeves, and mark
the sequence accordingly. The
individual components should be
unscrewed or removed.
During disassembly of the pump, individual parts
should be cleaned and inspected as follows:
1. Discard used oil seals, shims and o-
rings. Thoroughly wash and clean all
parts with a suitable solvent.
2. Check shaft for runout, scratches,
grooves, or any possible damage.
Touch up scratches and grooves with a
polishing cloth and inspect for remaining
grooves or deep scratches. A bent or
excessively damaged shaft should be
replaced.
3. Inspect mechanical seals. Repair or
replace mechanical seals that are
extremely dirty or damaged.
4. Check all shaft sleeves and spacer
sleeves visually for score marks,
scratches, pits, grooves or burrs. Touch
up sleeves with polishing cloth and
inspect for remaining grooves or deep
scratches. Remove burrs with a file.
Shaft sleeves and spacer sleeves
should be replaced if any marks, pits or
grooves are still visible after touching
up.
5. Inspect impellers for pitting, erosion, or
clogged vanes. Replace impellers that
are damaged. If new impellers are
installed, check to make sure all
impellers are balanced and axially
aligned with respect to the diffusers.
Refer to paragraph F of this section for
axial alignment procedures.
6. Inspect wear ring clearance for each
stage as follows:
a. Measure outside diameters of
impeller hubs in three places.
b. Measure the inside diameters of
corresponding wear rings in three
places.
c. Corresponding differences
between high readings of inside
diameters of wear rings and low
readings of outside diameters of
impellers. Refer to Table 13 and
Table 14 for specified clearance of
wear rings.
d. If wear ring replacement is
required, take casings and
impellers to a suitable work area
with access to machine shop
equipment. Replace wear rings as
described in paragraph G of this
section.