Boiler feed water and pumps are specific types of pumps that are specially designed and used for feeding stationary boilers of the conventional ( organic fuel) fired steam power plants with water. These pumps are normally high pressure units that use suction from a condensate return system. The pumps II3 90-180 and II3 90-110 deliver feed water into the steam generating plants that are used for the exploitation of the oil fields). Motor driven horizontal multistage segmental or barrel- casing ( with a withdraw able cartridge of ring section type) centrifugal pumps- single flow impeller arrangement, with all the impellers facing the same way.Feed water pumps range in size up to many horsepower and the pump rotor is supported by the oil-ring or pressure lubricated plain bearings.
Shaft sealing: These are mechanical seals or packed glands. Pumps for 380 and 580 m3/h rated capacity may be operated either equipped with a fluid coupling or without it. The pump for a duty of 780m3/h may be equipped either with a fluid coupling or with an adjustable - frequency synchronous motor. In case of 600 m3/h pump a fluid coupling is indispensable.





