![]() ![]() Pressure Gauge Hydraulic control valve Purging connection OPERATION MANUAL FRAMO CARGO PUMPS Local Control Valve Wear rings are fitted between the impeller and the volute casing. A backstop unit is fitted to the shaft, enabling cargo to be loaded through the pump. Any leakagees in the cofferdam chamber will, by purging with compressed air or nitrogen, be blown through the cofferdam check pipe and collected in the exhaust trap. The cargo seal is exposed only to static head from the cargo. This seal arrangement consists of a mechanical oil seal, single cofferdam lip seal and a double cargo lip seal. The hydraulic section is surrounded by a cofferdam that completely segregates the hydraulic oil from the cargo, with a manual seal-condition monitoring system. A short, independent shaft, supported by bearings lubricated by hydraulic oil, is connected to a singlestage, end-suction centrifugal pump. The motor is surrounded by low pressure hydraulic oil. to associated instructions 1000-0102-4: Purging Routine for cargo pumps with liquid filled cofferdam 1000-0109-4: Interchange of hydraulic control valve 1375-0027-4: Service manual for Speed Torque Controller (STC)ġ.3 Pump unit The pump unit is mounted to the pipestack/casing with the compact hydraulic motor located inside the casing. The pipestack connect the pump unit to the top cover plate. Precautions if using cargo pumps in sea water The pressure gauge indicates the oil pressure to the motor. This specially developed control valve regulates hydraulic pressure and oil flow to the motor according to the given discharge situation. All the connections are on the top cover plate, to which a hydraulic control valve is also mounted for remote and local operation of the cargo pump. ![]() ![]() The pump consists of three main parts: Top cover plate Pipe stack Pump unit.ġ.1 Top cover plate The cargo pump is supported by a deck trunk welded to the deck. The Framo cargo pump is a single stage centrifugal, hydraulically driven, submerged cargo pump in stainless steel. ![]()
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