ITT 3610 i-FRAME Manual page 64

5.17 Pump operation precautions
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• Check the bearing temperatures using a pyrometer or other temperature-measuring de-
vice. Monitor the bearing temperature frequently during initial operation in order to deter-
mine if a bearing problem exists, as well as to establish normal bearing operating temper-
ature.
• The maximum allowable temperature change for an abnormal transient event such as
thermal shock is 65°C | 150°F.
• For pumps with auxiliary piping, make sure that proper flows have been established and
that the equipment is operating properly.
• Establish baseline vibration readings in order to determine normal running conditions. If
the unit is running roughly, then consult the factory.
• Monitor all gauges to ensure that the pump is running at or near rating and that the suc-
tion screen (when used) is not clogged.
Operation at reduced capacity
WARNING:
• Risk of breach of containment and equipment damage. Excessive vibration levels can
cause damage to bearings, stuffing box, seal chamber, and/or mechanical seal. Observe
pump for vibration levels, bearing temperature, and excessive noise. If normal levels are
exceeded, shut down and resolve.
• Risk of explosion and serious physical injury. Do not operate pump with blocked system
piping or with suction or discharge valves closed. This can result in rapid heating and va-
porization of pumpage.
• Risk of equipment damage and serious physical injury. Heat build-up can cause rotating
parts to score or seize. Observe pump for excessive heat build-up. If normal levels are
exceeded, shut down and resolve.
NOTICE:
Cavitation can cause damage to the internal surfaces of the pump. Ensure net positive suction
head available (NPSH
performance curve of the pump.
Operation under freezing conditions
NOTICE:
Do not expose an idle pump to freezing conditions. Drain all liquid that will freeze that is inside
the pump and any auxiliary equipment. Failure to do so can cause liquid to freeze and damage
the pump. Note that different liquids freeze at different temperatures. Some pump designs do
not drain completely and may require flushing with a liquid that doesn't freeze.
62 3610 i-FRAME API 610 11th Ed/ISO 13709 2nd Ed, API Type BB1 Single-Stage, Axially-Split, Between-Bearing IOM
The specific gravity or viscosity of the fluid is greater than expected
The pumped fluid exceeds the rated flow rate.
) always exceeds NPSH required (NPSH
A
) as shown on the published
3