Main Feed Pumps Parts

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Filter By: Annular Ball Bearings
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Part Number
NSN
NIIN
000-051-081 Annular Ball Bearing
001564742
00035876N Annular Ball Bearing
001448589
0006206 Annular Ball Bearing
005543197
000625006211 Annular Ball Bearing
005555238
001-41308P Annular Ball Bearing
005545966
0011 Annular Ball Bearing
005543197
002000-03 Annular Ball Bearing
001448589
00213-0571 Annular Ball Bearing
005543913
00213-0573 Annular Ball Bearing
002939302
004-99974 Annular Ball Bearing
002939302
0042832 Annular Ball Bearing
002939163
0042980 Annular Ball Bearing
002939302
0042980-3 Annular Ball Bearing
002939302
0042986-0 Annular Ball Bearing
001448518
00503886 Annular Ball Bearing
005555238
005165490 Annular Ball Bearing
005165490
006207000 Annular Ball Bearing
005165490
00643A483-063 Annular Ball Bearing
001448589
0067916 Annular Ball Bearing
001448519
0067916-7 Annular Ball Bearing
001448519
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Main Feed Pumps

Picture of Main Feed Pumps

A deaerating feed tank (DFT), often found in steam plants that propel ships, is located after the main condensate pump and before the main feed booster pump. It has these three purposes:

Based on the relevant theoretical Rankine cycle diagram, there are four main processes, or steps:

In the practical implementation of a Rankine cycle, it is common to break the single pump (process 1 to 2) into three pumps: (in water flow order: condensate pump, feed booster pump and then feedwater pump).

A surge volume allows the plant to change bells (power output level) without running the feed pump dry or flooding the turbines. Consider the plant running in a steady state condition.

The bell is increased, more power output demanded, the rate of feed is increased. This draws more water from the condenser, perhaps to the point of being dry and starving the boiler resulting in a loss of propulsion. This is until the water, converted to steam, provides its energy to the turbine and then is condensed in the condenser.

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