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- Description
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- Did you know
- Maintenance Schedule
- Engineering Knowledge
Description
Finland-based global supplier of complete cargo handling systems, including electrically or hydraulically driven deepwell cargo pumps for LNG carriers and other tankers.
Did you know
- Wärtsilä, a company established in 1834, has been involved in marine equipment for a significant period. While a specific launch year for the general 'Cargo Pump (Tankers (Oil & Gas))' series is not available, Wärtsilä's deepwell cargo pump technology, a core component of these systems, has been continuously developed and refined over time. For instance, the Wärtsilä LNGPac, which incorporates deepwell pump technology for LNG fuel, was introduced in 2009.
- Wärtsilä offers various cargo pump solutions, including deepwell and submerged pumps. The deepwell cargo pump is designed to be submerged in the fluid, with its impeller in a well in the tanktop, making it suitable for double-hulled tankers. In contrast, submerged cargo pumps, such as the Hamworthy/Wärtsilä CX series, are typically installed in a dedicated pump room with suction from cargo tanks.
- Wärtsilä's deepwell cargo pumps are chosen for their ability to eliminate the need for a traditional pumproom, offer greater pumping and stripping efficiency, and provide more flexible cargo segregation. They are also constructed with corrosion-resistant stainless steel components, ensuring durability and reliability.
| Model | Flow Rate (m³/h) | Head (m) | Drive Type |
|---|---|---|---|
| Wärtsilä Deepwell Cargo Pump | Variable (e.g., 1700 for LNG, 350-600 for gas carriers) | Variable (e.g., 115-120 mLC for gas carriers) | Electric or Hydraulic |
| Hamworthy/Wärtsilä CX-300/160m (Submerged) | 300 | 160 | Not specified (typically electric) |
Engineering Knowledge
General engineering guidance only — it may contain errors. Always follow the equipment's own documentation and the judgement of a qualified engineer.
Cofferdam cannot be purged (no air, inert gas, or liquid from check pipe)
Check valves, hose connections, and the purging medium relief valve (should open at approximately 3 bar). Inspect the exhaust trap and deck piping for blockages and clear them if possible.
Cofferdam is blocked and cannot be purged
Disconnect the check pipe from the pump unit (lower seal house), being aware of possible pressurized liquid. Carefully purge to determine if the blockage is in the check pipe or the pump/pipe stack cofferdam. Use steam or solvent to dissolve the blockage, or dismantle the pump if necessary. Perform a leak test after assembly.
Cargo leakage into pump cofferdam
Perform a leak test on the pump cofferdam system at approximately 3 bar. Check for leakage, using soapy water if needed to locate the source. If no leakage is detected during the leak test, a worn cargo seal is likely the cause.
Worn cargo seal causing leakage to cofferdam
Replace the cargo seal set. Carefully inspect the ceramic sleeve for any damage or wear.
Leaking seal element in flange connection causing cargo leakage
Check for loose bolts and pitting corrosion in the seal faces; repair corrosion if found. When reassembling, renew any damaged seal elements.
Crack or pinhole in piping causing cargo leakage
Contact a Framo Service Station for assistance.
Hydraulic oil leakage into pump cofferdam
Drain the pump return side before dismantling. Disconnect the pump head/unit from the pipe stack/casing. Pressurize the pump unit return side at approximately 4 bar and check for leakage to the cofferdam side. Leak test the pump pipe stack/casing at a maximum of 7 bar on the cofferdam side and check for leakage to the return side.
Leaking shaft seal causing hydraulic oil leakage
Replace the shaft seal. Recondition the replaced seal if feasible.
Leaking seal element in flange connection causing hydraulic oil leakage
Check the sealing surface for possible damage and repair if necessary. When reassembling, renew any damaged seal elements.
Crack or pinhole in piping causing hydraulic oil leakage
Contact a Framo Service Station for assistance.
Competitive Models
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Send enquiry
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Code map
^K A A W │ │ │ └── Model: Wärtsilä │ │ └───── Make: Cargo Pump │ └──────── Equipment: Tankers (Oil & Gas) └─────────── System: Cargo