The DESWELL pumps consist of 3 main components, namely the pump cylinder, the pipe stack and the base arrangement. In order to achieve the required head, the pump cylinder is designed with a variable number of impellers and casings. The pipe stack consists of a number of intermediate pipes in which the cargo is transported to the outlet flange of the discharge socket. The intermediate shaft, which drives the impellers, is placed in the centre of the pipe stack. The shaft is supported by guide bearings for each 1.5 metres, which is also the length of the intermediate pipes in the pipe stack. The bearings are made of carbon and are lubricated by the cargo.
If a mechanical seal should fail, it can be replaced without depressurising the tank, thanks to a built-in static seal. This feature is standard in all DEEPWELL pumps for liquified gases.
The base arrangement is bolted to the dome flange of the tank and thus carries the pump. The main parts are the discharge socket, the seal arrangement, the bearing arrangement, and the motor console with the electric motor.
For barges where limited height of the base arrangement is available DESMI has constructed a very noiseless arrangement with belt drive.
The pumps are designed to operate in temperatures ranging from -104°C up to +180°C. The material combination will for each order be selected in due consideration of the cargo list and the operating temperatures of the pumps. |
