VRF 9/350G

Typowe problemy

• Mechanical seal weeping or failure, often triggered by dry running or cavitation on start-up
• Impeller erosion and pitting from cavitation, aggravated by seawater carrying sand or silt
• Bearing wear or overheating from misalignment, or seawater ingress into the bearing housing after a seal failure
• Casing wear ring clearance increasing over time, causing loss of head and capacity
• Shaft sleeve corrosion at the seal faces in continuous seawater service
• Coupling misalignment leading to vibration and premature bearing or seal failure
• Suction strainer fouling causing cavitation and reduced flow
• Motor overload from a partially blocked discharge or worn internal clearances forcing the pump off its curve

Lista kontrolna przeglądu

• Check mechanical seal for leakage at the gland
• Check bearing housing temperature and vibration levels
• Compare discharge pressure and flow against the pump's baseline performance curve
• Inspect suction strainer/sea chest for fouling
• Check coupling alignment
• Inspect casing wear rings and impeller clearances at overhaul
• Check motor running current against nameplate rating
• Listen for cavitation noise, especially at low suction head
• Check foundation bolts and pipework supports for looseness or vibration marks

Interwały serwisowe

Typowe interwały dla tej klasy konstrukcji, nie dane producenta dla Twojego modelu. Wiążąca jest instrukcja producenta.

Typowe granice zużycia

Zakresy są typowe dla tej klasy konstrukcyjnej. Decydujące są zawsze dokumenty producenta dla danego numeru seryjnego.

Krytyczne części zamienne

• Mechanical seal kit
• Shaft sleeve
• Bearing set (drive end/non-drive end)
• Casing wear rings
• Gasket and O-ring set
• Coupling element/insert

Bezpieczeństwo

• Rotating shaft and coupling - guard must be fitted before running
• Pressurized seawater system - isolate and vent before opening the casing
• Electrical hazard at the motor terminal box - lock out/tag out before maintenance
• Heavy components (motor, casing halves) - use proper lifting gear during overhaul

Przegląd klasyfikacyjny

As an essential seawater cooling pump, this unit typically falls under Continuous Survey of Machinery where the ship carries that notation; surveyors look for a satisfactory running/performance test, up-to-date seal and bearing maintenance records, and evidence that standby capacity is available

Szacowana trwałość: No standard running-hour figure applies to a seawater centrifugal pump; service life is normally expressed in years (commonly 15-25 years) and is driven by seal and bearing renewal cycles and water quality rather than a fixed hour count