DG High Pressure Boiler Feed Pump

Application 
Type DG high pressure boiler feed pumps are used for feeding high pressure boiler or pumping high pressure clean water.
The temperature of pumped media is not more than 160°C
Range of capacity: 100 to 580 m3/h
Range of total head: 1128 to 1690m

Construction 
The pumps are sectional casing multi-stage centrifugal pump. Suction and discharge nozzles of pumps are arranged vertically up. Section middle stage and discharge casing are rigidly held together by tie bolts. The joints between these casings are primarily sealed by means of metal-metal contact simultaneously. O-ring are used as auxiliary seals. The forged pieces are used for the suction, stage and discharge casing of type BGB high pressure boiler feed pump.

Shaft sealing 
The rotating of these pumps are sealed by soft-packing and cooling water. In the region of shaft sealing, the pump shaft is protected by renewable sleeve.

Bearings and Axial balancing device 
The rotating assembly is supported by sliding bearings on both ends of the pump shaft. Bearing of pump are forced—lubricated. The oil system is equipped for type DG pump. The axial thrust of rotor is balanced by balance disc. And the thrust bearing is also provided which is used to bear residual axial force caused by the change of working conditions.