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3E32

Cooling Water Pump · Cooling Water Pumps

Technical data from manufacturer or class sources · not yet verified by a person​‍​⁠‌‍‌​‍‌​​⁠⁠‍‍‌​​​

Ebara 3E32 — Cooling water, inline extended shaft.

Specifications

Technical data.reference — unverified

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Motors2/4 pole
Inspection

Inspector Detail

Common issues

  • Mechanical seal leakage from dry running or debris in the sealed fluid
  • Impeller wear ring clearance increase, reducing flow/head performance
  • Bearing wear/noise from misalignment or lubrication neglect
  • Cavitation from insufficient NPSH, especially at high sea water temperature
  • Coupling misalignment causing vibration and premature seal/bearing failure
  • Impeller fouling/erosion from sand, marine growth or debris in raw water

Inspection checklist

  • Check the mechanical seal for leakage/weeping
  • Measure and log discharge pressure/flow against the baseline curve
  • Check motor and pump bearing temperature and vibration
  • Inspect coupling alignment and condition
  • Check the upstream strainer/filter for blockage
  • Inspect the impeller and wear rings at overhaul for erosion/clearance
  • Verify motor insulation resistance and current draw against nameplate

Service intervals

Mechanical sealinspect at each overhaul, typically renewed every 8,000-12,000h or on leakage
Bearing grease/relubricationper motor manufacturer, commonly every 2,000-4,000h or per PMS
Impeller/wear ring inspectionat overhaul, typically every 12,000-16,000h or per condition
Coupling alignment checkannually or after any pump/motor disturbance

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Impeller/casing wear ring radial clearancebauart-typical guide of roughly 0.3-0.6 mm new, condemned around double the new clearance - confirm against Ebara's manual for this frame size
Mechanical seal facerenew at first sign of leakage past what is acceptable for continued running; no dimensional figure applies generically

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Mechanical seal (correct size/material for cooling water duty)
  • Impeller wear rings/casing wear ring
  • Shaft sleeve
  • Motor/pump bearing set
  • Coupling element

Safety

  • Rotating shaft/coupling guard must be in place before operation
  • Hot cooling water circuits carry a scald risk at the seal/gland during running
  • Isolate and lock out electrically before opening the pump casing
  • Pressurized casing - depressurize and drain before disassembly

Class survey

Cooling water pumps supporting essential machinery (main engine, generators) are covered under Continuous Survey Machinery; class checks include standby pump availability, automatic changeover function where fitted, and that spares for essential pumps are carried onboard.

Estimated lifetime: Cast iron centrifugal cooling water pumps of this type typically achieve 15-20+ years of service with periodic seal, bearing and wear-ring renewal at the intervals above; overall casing life is condition-based rather than hour-based.

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