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may also serve as the feedwater pump. In either case, to force the water into the boiler, the pump must generate sufficient pressure to overcome the steam pressure developed by the boiler. This is usually accomplished through the use of a centrifugal pump. Another common form of feedwater pump runs
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also require feedwater pumps. In this situation, though, the pump was often powered using a small steam engine that ran using the steam produced by the boiler. A means had to be provided, of course, to put the initial charge of water into the boiler (before steam power was available to operate the
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Mechanical seals of boiler feedwater pumps often show signs of electrical corrosion. The relative movement between the sliding ring and the stationary ring provokes static charging which is not diverted due to the very low conductivity of the boiler water (below one micro-Siemens per cm ). Within
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A duplex steam pump has two sets of steam and water cylinders. They are not physically connected but the steam valves on the first pump are operated by the movement of the second pump's piston rod, and vice versa. The result is that there are no "dead spots" and the pump is always self-starting.
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short periods of operation – in some cases, only a few hundred operational hours – pieces having the size of fingertips break off from the sliding and/or the stationary ring and cause rapid increases in leakage current. Diamond-coated (
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steam-powered feedwater pump). The pump was often a positive displacement pump that had steam valves and cylinders at one end and feedwater cylinders at the other end; no crankshaft was required.
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produced as a result of the condensation of the steam produced by the boiler. These pumps are normally high pressure units that take suction from a condensate return system and can be of the
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constantly and is provided with a minimum flow device to stop overpressuring the pump on low flows. The minimum flow usually returns to the tank or deaerator.
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is usually separated from the pump body by some form of mechanical coupling. Large industrial
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Please expand the article to include this information. Further details may exist on the
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357:. John Wiley & Sons (Reprinted by Kessinger Publications, 2007 ).
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Feedwater pumps range in size up to many kilowatts and the
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and steam condensation to deliver water to a boiler.
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avoid this problem and extend durability remarkably.
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Diamond-coated (DLC) seals in 27.000h endurance test
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60:. Unsourced material may be challenged and removed.
253:used on ships and stationary applications such as
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328:"Duplex Pump (from Internet Glossary of Pumps)"
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27:Pump used to feed water into a steam boiler
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120:Learn how and when to remove this message
1627:Glossary of steam locomotive components
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181:about turbine-driven feedwater pumps.
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156:type or positive displacement type.
58:adding citations to reliable sources
354:Practice and Theory of the Injector
1479:National Museum of Scotland engine
25:
1661:List of steam technology patents
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45:needs additional citations for
1646:Murdoch's model steam carriage
1632:History of steam road vehicles
638:Internally rifled boiler tubes
1:
1573:Murray's Hypocycloidal Engine
1296:Return connecting rod engine
316:Technical University of Graz
1220:Condensing steam locomotive
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1527:"Coalbrookdale Locomotive"
217:Failure of mechanical seal
160:Construction and operation
1533:"Pen-y-Darren" locomotive
1202:Single- and double-acting
1372:Newcomen Memorial Engine
349:Strickland Landis Kneass
1712:Steam boiler components
1676:Timeline of steam power
1671:Stationary steam engine
1554:Woolf's compound engine
1461:Soho Manufactory engine
1316:Steeple compound engine
983:straight line mechanism
69:"Boiler feedwater pump"
1681:Water-returning engine
1655:Lean's Engine Reporter
1428:Chacewater Mine engine
1301:Six-column beam engine
330:. Animatedsoftware.com
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179:is missing information
136:is a specific type of
1521:London Steam Carriage
607:Electric water boiler
602:Electric steam boiler
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134:boiler feedwater pump
1467:Bradley Works engine
1291:Reciprocating engine
1114:Babcock & Wilcox
957:Centrifugal governor
526:Babcock & Wilcox
54:improve this article
1008:Sun and planet gear
242:Weir feedwater pump
234:Steam-powered pumps
1508:Richard Trevithick
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920:Gresley conjugated
682:Boiler peripherals
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460:Fire-tube boilers
364:978-0-548-47587-4
262:Duplex steam pump
247:Steam locomotives
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65:Find sources:
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43:This article
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1666:Modern steam
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1600:Porter-Allen
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1311:Safety valve
1240:"Pickle-pot"
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1134:Thimble tube
703:
694:Boiler water
643:Safety valve
633:Fusible plug
571:Thimble tube
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332:. Retrieved
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271:Jet injector
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255:power plants
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193:October 2016
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146:steam boiler
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52:Please help
47:verification
44:
1397:Watt engine
1197:Oscillating
1153:Boiler feed
998:Plate chain
977:Tusi couple
890:Walschaerts
775:Atmospheric
719:Superheater
673:Water gauge
531:Corner tube
1696:Categories
1606:Ljungström
1592:High-speed
1485:Lap Engine
1441:Resolution
1345:Precursors
1230:Kirchweger
1192:Locomotive
1139:Three-drum
1119:Field-tube
1086:Locomotive
1068:Lancashire
988:Link chain
972:Crankshaft
939:Mechanisms
867:Valve gear
663:Steam drum
658:Steam dome
576:Three-drum
536:Field-tube
503:Transverse
488:Locomotive
445:Lancashire
334:2012-04-22
299:References
150:condensate
110:April 2012
80:newspapers
1637:Cugnot's
1580:Salamanca
1281:Hydrolock
1266:Crosshead
1212:Condenser
1048:Egg-ended
430:Egg-ended
279:uses the
185:talk page
142:feedwater
1620:See also
1546:Compound
1421:Old Bess
1261:Blowback
1184:Cylinder
1170:Injector
1129:Stirling
1124:Sentinel
1038:Haystack
952:Cataract
925:Southern
915:Caprotti
790:Compound
709:Injector
648:Smokebox
581:Vertical
566:Stirling
556:Sentinel
551:Monotube
508:Vertical
440:Haystack
351:(1894).
287:See also
249:and the
1717:Boilers
1336:History
1245:Surface
1063:Cornish
1023:Boilers
905:Corliss
842:Corliss
825:D slide
795:Uniflow
785:Cornish
628:Firebox
478:Haycock
468:Cochran
425:Cornish
406:Boilers
144:into a
94:scholar
1648:(1784)
1642:(1769)
1608:(1908)
1602:(1862)
1583:(1812)
1575:(1805)
1565:Murray
1556:(1803)
1535:(1804)
1529:(1803)
1523:(1803)
1517:(1801)
1487:(1788)
1481:(1786)
1475:(1785)
1469:(1783)
1463:(1782)
1444:(1781)
1436:(1779)
1430:(1778)
1424:(1777)
1416:(1768)
1388:(1795)
1382:(1760)
1374:(1725)
1355:(1698)
1321:Stroke
1286:Piston
1271:Cutoff
1144:Yarrow
1096:Launch
1091:Scotch
852:Sleeve
847:Poppet
832:Piston
813:Valves
805:Valves
586:Yarrow
561:Spiral
546:LaMont
498:Scotch
493:Pistol
483:Launch
361:
96:
89:
82:
75:
67:
1707:Pumps
1254:Other
1058:Flued
1043:Wagon
967:Crank
910:Lentz
900:Baker
895:Allan
820:Slide
541:Flash
450:Wagon
435:Flued
101:JSTOR
87:books
1406:Beam
947:Beam
857:Bash
837:Drop
780:Watt
653:Stay
359:ISBN
138:pump
73:news
1225:Jet
1053:Box
885:Joy
875:Gab
420:Box
275:An
224:DLC
56:by
1698::
314:,
226:)
132:A
753:e
746:t
739:v
398:e
391:t
384:v
367:.
337:.
195:)
191:(
187:.
123:)
117:(
112:)
108:(
98:·
91:·
84:·
77:·
50:.
20:)
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