Main Feed Pumps Parts

End item NSN parts page 1 of 51
Part Number
NSN
NIIN
0-55 O-ring
012443527
0.625-11UN-2B NICU Hexagon Plain Nut
002725701
00-4397-016-888 Dial Indicating Pressure Gage
002395330
00-7024-041-163-110 Electrical Receptacle Connector
009267522
00-7024-41-163-1 Electrical Receptacle Connector
009267522
00.520.0835 Duplex Ball Bearing
001588308
000-051-081 Annular Ball Bearing
001564742
000-8008-454 Electrical Receptacle Connector
010123080
000-90547-060 Tube Repair Plug
002890593
000.238.0767N Compression Helical Spring
002973603
000.239.0767 Compression Helical Spring
002973603
0000-095-160 Retaining Ring
002633831
0000-305808 O-ring
001651960
0000145370 Drive Screw
002535612
0000453578 Bearing Ball
001006158
000073X0131 O-ring
010393075
000094 003226 Cotter Pin
000120123
0001131 Hexagon Head Cap Screw
000680501
000197X0612 Hexagon Head Cap Screw
007247223
000197X0719 Hexagon Head Cap Screw
007247223
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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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