Centrifugal Pump · Pumps
Naniwa Pump Naniwa FS Series — Pumps, cooling.
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| Mechanical seal / packing inspection | every 3-6 months |
|---|---|
| Bearing lubrication (grease or oil renewal) | per the pump manufacturer's schedule, commonly annually or every 2,000-4,000 running hours |
| Suction strainer cleaning | monthly, or more often if the cooling water is fouled |
| Coupling alignment check | annually, and after any pump or motor removal |
| Wear ring / internal clearance check | at overhaul, typically every 2-4 years depending on duty |
| Wear ring radial clearance | typically a few tenths of a millimetre when new for this pump size; renew when clearance has roughly doubled - confirm against the pump's own clearance table |
|---|---|
| Overall bearing housing vibration | investigate and consider bearing renewal once trended vibration significantly exceeds the pump's own established baseline, rather than acting on a single generic figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Cooling water pumps supporting essential machinery are normally within the vessel's machinery survey scope; availability of a standby pump and correct valve line-up are commonly checked alongside pump condition.
Estimated lifetime: Bearings commonly achieve on the order of 20,000-40,000 running hours with correct lubrication and alignment; mechanical seals are typically shorter-lived, often in the 8,000-20,000 hour range depending on water quality and duty - both figures depend heavily on installation and cooling water condition.
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