Boiler Feed Water 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 780 m3/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.