Pump in the power plant is utilized to flow feedwater into steam boiler. The name of this pump is Boiler Feed Pump (BFP). Type pump which is often used is centrifugal pump. Centrifugal pump has some parts. The following below are the parts of centrifugal pump:
- Stuffing Box
Stuffing Box serves to prevent leakage in the area where the shaft penetrates the pump casing.
Packing is used to prevent and reduce the leakage of fluid from the pump casing through the shaft. Packing is usually made of asbestos or Teflon.
Shaft serves to continue the torque from the drive during operation and the seat of the impeller and other rotating parts.
- Shaft sleeve
Shaft sleeve serves to protect the shaft from erosion, corrosion and wear of the stuffing box. In multi-stage pump can be as leakage joint, internal bearings and inter stage or distance sleever.
Vane is blades of the impeller as a place of passage of fluid in the impeller.
Casing is the outermost part of pump that serves as a protective element that rotates, the seat of diffusor (guide vane), inlet and outlet nozzle as well as a place to give flow direction from the impeller and convert energy of fluid velocity into dynamic energy (single stage).
- The Eye of Impeller
The eye of impeller is the entrance side of suction direction of impeller.
Impeller serves to convert mechanical energy of the pump into velocity energy speed of fluid which is pumped continuously, so that the liquid on the suction side can continually fill the empty caused by the displacement of fluid that entered previously.
- Wearing Ring
Wearing the ring serves to minimize leakage of fluid passing through the front of impeller and the back of impeller, by minimizing the gap between the impeller casing.
Bearing serves to withstand the load shaft so it can rotate continuously, either in the form of radial loads and axial loads. Bearing also allows the shaft to rotate smoothly and remain in place, so that frictional losses become smaller.