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EMC marine vertical centrifugal pump is used chiefly for cooling fresh water ,cooling sea water service ,bilge & ballast ,ballast ,fire & general service . The pump can be used as an automatic self-priming pump by fitting an air ejector .
This type vertical centrifugal pump has been for convenience of shipboard outfitting and special consideration has been given to such points as minimizing the area of installation ,ease of overhaul and at the same time reduction of maintenance cost ,and smooth operation.
1. The pump rotating element is rigidly connected to the motor shaft through closed coupling and supported by the line bearing provided in the cover and the ball bearing of the motor.
2. The pump casing is integrally cast instead of conventional split construction .
3. Double volute design is adopted for the pump casing ,so radial thrust on the impeller becomes minimum .
4. The axial thrust is caused by the weight of the rotating element alone and it is so designed as to balance the hydraulic thrust .
5. The shaft power curve have a highest point, so it is not to overload the motor power in any conditions.
6. The impeller is of single suction and in order to improve suction performance Francis vanes are adopted .
Marine vertical centrifugal pump