Svanehøj

Cargo pump cofferdam cannot be purged (no air, inert gas, or liquid from check pipe).

Check for insufficient purging medium supply by inspecting valves, hose connections, and the purging medium relief valve (which opens at approximately 3 bar). Also, check the exhaust trap and deck piping for blockages and clear them if possible.

Cargo pump cofferdam is blocked.

Disconnect the check pipe from the pump unit (lower seal house), being cautious of possible pressurized liquid. Purge carefully to determine if the blockage is in the check pipe or the pump/pipe stack cofferdam. Use steam or solvent to dissolve the blockage, depending on the medium. Dismantling the pump may be necessary. Perform a leak test after reassembly.

Cargo leakage to pump cofferdam is observed.

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 by the leak test, the cargo leakage is likely due to a worn cargo seal.

Cargo leakage to pump cofferdam due to worn cargo seal.

Replace the cargo seal set. Carefully inspect the ceramic sleeve for any damage or wear.

Cargo leakage to pump cofferdam due to leaking seal element in flange connection.

Check for loose bolts and pitting corrosion in the seal faces. Repair corrosion if present. When assembling, renew any damaged seal elements.

Cargo leakage to pump cofferdam due to crack or pinhole in piping.

Contact a Framo Service Station for assistance.

Hydraulic oil leakage to pump cofferdam is observed.

Drain the pump return side before dismantling. Disconnect the pump head/unit from the pipe stack/casing. Pressurize the pump unit return side to 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.

Hydraulic oil leakage to pump cofferdam due to leaking shaft seal.

Replace the shaft seal. The replaced seal may be reconditioned if feasible.

Hydraulic oil leakage to pump cofferdam due to leaking seal element in flange connection.

Check the sealing surface for possible damage and repair if necessary. When assembling, renew any damaged seal elements.

Hydraulic oil leakage to pump cofferdam due to crack or pinhole in piping.

Contact a Framo Service Station for assistance.