ITT Goulds Pumps V 3298, Инструкции по установке, эксплуатации и обслуживанию

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APPENDIX V
Reliability Tips for Operating
Lined Magnetically-Driven Sealless Pumps
QUICK REFERENCE SUMMARY
These summarized reliability guidelines outline
recommendations for creating an optimal environment for
operating lined mag-drive pumps. For further details on
the subject of operating a lined-mag drive pump with
superior reliability, please request the Lined Mag-Drive
Reliability Guide from your ITT Goulds Pumps’
representative.
·
Do not operate mag-drive pumps under no flow
conditions.
·
Do not operate mag-drive pumps against a closed
discharge valve.
·
Do not operate mag-drive pumps with solids that
exceed the manufacturer’s maximum limits in particle
size or concentration.
·
Before operating mag-drive pumps, confirm chemical
compatibility of process liquid with all wetted pump
components in an effort to reduce corrosion,
permeation, or erosion.
·
Do not operate mag-drive pumps with process liquids
that may exceed the maximum temperature limits or
fall below the minimum temperature limits defined by
the pump manufacturer.
·
Do not operate mag-drive pumps outside of the
manufacturer’s recommended operating range.
Otherwise, recirculate adequate flow through bypass
lines when operating near or below the manufacturer’s
recommended mechanical and thermal operating flow
to prevent excessive temperature rise or recirculation
cavitation.
·
Consider the inner and outer magnet assemblies’
material temperature limits and recoverable flux
density losses due to increased temperatures.
·
Do not operate mag-drive pump without considering
the process liquid’s vapor pressure characteristics over
the temperature range of the application. Adequate
NPSHa as well as vapor pressure is mandatory to
prevent cavitation or vaporization in localized low
pressure regions within the pump.
·
Use power monitoring devices when potentially
operating near or outside of the manufacturer’s
recommended operating envelope.
·
Consider temperature controlling devices such as heat
jackets or steam tracing for pumps that are subject to
process fluids that transform characteristics such as
viscosity, specific gravity, crystallization, coagulation,
solidification, or vaporization with variable process
temperatures.
·
Use temperature monitoring devices such as
thermocouples, RTDs, temperature controllers, or
thermometers when process fluid is susceptible to
critical variations in temperature.
·
Use leak detectors such as fiber optic sensing devices
or pressure monitoring devices when fluid is prohibited
from entering the atmosphere.
·
Ensure selected motor torque at maximum power and
start-up conditions for corrected hydraulic and
magnetic loss power at worst case fluid specific gravity
and viscosity is less than the magnet break-away torque
at maximum temperature.
·
Keep process liquid in liquid form. Prevent the liquid
from flashing.
·
Do not exceed the manufacturer’s maximum viscosity
limits as internal fluid circulation velocities will be
inadequate to properly cool and lubricate sleeve
bearings.
3298 Family Rev. 4/07
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