Main Feed Pumps Parts

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Part Number
NSN
NIIN
00.520.0835 Duplex Ball Bearing
001588308
00543101-007 Duplex Ball Bearing
001014642
1168P Duplex Ball Bearing
001091375
16065 Duplex Ball Bearing
001091375
20407DT Duplex Ball Bearing
001566819
20407DU Duplex Ball Bearing
001566819
215536-14 Duplex Ball Bearing
001091391
27407 Duplex Ball Bearing
001091375
2X55 Duplex Ball Bearing
001588298
30305DND Duplex Ball Bearing
001091346
45P Duplex Ball Bearing
001091375
61361PC798 Duplex Ball Bearing
001982210
61362PC880 Duplex Ball Bearing
001982210
6536 Duplex Ball Bearing
001588298
7212BG Duplex Ball Bearing
001588308
7212BGY2 Duplex Ball Bearing
001588308
7212BGY2BRGS Duplex Ball Bearing
001588308
7212BYG Duplex Ball Bearing
001588308
7304BEGAMVU099 Duplex Ball Bearing
001014641
7304BEM/DGA Duplex Ball Bearing
001014641
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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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