Symptom
Cause
Remedy
The foundation is not rigid.
Tighten the hold-down bolts of the
pump and motor. Make sure the
baseplate is properly grouted
without voids or air pockets.
The bearings are worn.
Replace the bearings.
The suction or discharge piping
is not anchored or properly
supported.
Anchor the suction or discharge
piping as necessary according to
recommendations in the Hydraul-
ic Institute Standards Manual.
The pump is cavitating.
Locate and correct the system
problem.
The mechanical
seal is leaking ex-
cessively.
The packing gland is not ad-
justed properly.
Tighten the gland nuts.
The stuffing box is not packed
properly.
Check the packing and repack
the box.
The mechanical seal parts are
worn.
Replace the worn parts.
The mechanical seal is over-
heating.
Check the lubrication and cooling
lines.
The shaft or shaft sleeve is
scored.
Machine or replace the shaft
sleeve as necessary.
The motor re-
quires excessive
power.
The discharge head has drop-
ped below the rated point and
is pumping too much liquid.
Install a throttle valve. If this does
not help, then trim the impeller di-
ameter. If this does not help, then
contact your ITT representative.
The liquid is heavier than ex-
pected.
Check the specific gravity and
viscosity.
The stuffing-box packing is too
tight.
Readjust the packing. If the pack-
ing is worn, then replace the
packing.
Rotating parts are rubbing
against each other.
Check the parts that are wearing
for proper clearances.
The impeller clearance is too
tight.
Adjust the impeller clearance.
7.2 Alignment troubleshooting
Symptom
Cause
Remedy
Horizontal (side-to-side) align-
ment cannot be obtained (angu-
lar or parallel).
The driver feet are bolt-
bound.
Loosen the pump's hold-down bolts, and slide the pump
and driver until you achieve horizontal alignment.
The baseplate is not
leveled properly and is
probably twisted.
1.
Determine which corners of the baseplate are
high or low.
2.
Remove or add shims at the appropriate cor-
ners.
3.
Realign the pump and driver.
Vertical (top-to-bottom) align-
ment cannot be obtained (angu-
lar or parallel).
The baseplate is not
leveled properly and is
probably bowed.
1.
Determine if the center of the baseplate should
be raised or lowered.
2.
Level screws equally at the center of the base-
plate.
3.
Realign the pump and driver.
7.2 Alignment troubleshooting
3640 i-FRAME API Type BB2 2-Stage / ISO 13709 2nd Ed. API 11th Ed. Installation, Operation, and Maintenance Man-
ual
117
Содержание Goulds Pumps i-FRAME 3640
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