Circor HOUTTUIN TT Twin-Screw, Installation, Operation & Maintenance Manual

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Troubleshooting
74 TT
Twin-Screw Pump -
Installation, Operation, and Maintenance Manual
Symptom Cause Remedy
The mechanical seal is
leaking excessively. The mechanical seal parts are worn. Replace the worn parts.
The mechanical seal is overheating. Check the flushing and cooling lines.
Suction pressure is above the rated value Reduce the suction pressure
Barrier pressure is above the rated value Reduce the barrier pressure
The screw shaft is scored at the mechanical
seal location. Repair or replace the screw shaft as necessary.
The motor requires
excessive power. The discharge line is obstructed. Remove the discharge line obstruction.
The liquid is more viscous than specified. Bring the liquid viscosity to within specification or
have the pump and motor rerated for the new
condition.
The discharge pressure is too high Bring the discharge pressure to within
specification or have the pump and motor rerated
for the new condition.
The pump is worn or damaged. Inspect and replace the pump if necessary.
Alignment troubleshooting
Symptom Cause Remedy
Horizontal (side-to-side) alignment
cannot be obtained (angular or parallel). The driver feet are bolt-bound. Loosen the pump's hold-down bolts and
slide the pump and driver until you can
achieve horizontal alignment.
The baseplate is not leveled properly and
is twisted.
1. Determine which corners of the
baseplate are high or low.
2. Remove or add shims at the
appropriate corners.
3. Realign the pump and driver.
Vertical (top-to-bottom) alignment cannot
be obtained (angular or parallel). The baseplate is not leveled properly and
is bowed.
1. Determine if the center of the
baseplate should be raised or
lowered.
2. Level screws equally at the center of
the baseplate.
3. Realign the pump and driver.