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This valve worked by "connecting the upper and lower valves so as to be worked by one rod or spindle, and in making the stem or tube which connects them hollow, so as to serve for an induction pipe to the upper end of the cylinder." This allowed two valves to do the work of four.
191:. It was not much used in the UK but, at one time, had great popularity in the United States. It gave some of the advantages of a piston valve to a slide valve by relieving the pressure on the back of the valve, thus reducing friction and wear.
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92:
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188:
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27:
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With piston valves, the steam passages can be made shorter. This reduces resistance to the flow of steam and improves efficiency.
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981:
790:
167:
The above description (referring to upper and lower valves) clearly relates to an engine with a vertical cylinder, such as a
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65:. As the piston descends, the valve moves upwards to admit steam below the piston and release exhaust from above.
954:
886:
108:
In the 19th century, most steam locomotives used slide valves to control the flow of steam into and out of the
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used to control the admission of steam into and emission of exhaust from the cylinder of a
1160:
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57:. At the same time, exhaust steam from below the piston passes back up the lower passage
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and patented in 1799. It is named after the hollow central D-sectioned piston.
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112:. In the 20th century, slide valves were gradually superseded by
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slide valves adequately in the presence of superheated steam.
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31:Cylinder, with slide valve removed to show ports
171:. Where the cylinders are horizontal, as in a
260:
183:The balanced slide valve was invented by the
8:
916:
855:
542:
324:
267:
253:
245:
156:, is a form of slide valve, invented by
120:steam. There were two reasons for this:
1142:Glossary of steam locomotive components
45:, and is admitted by the slide valve
39:A double-acting slide valve cylinder.
7:
175:, the valves would be side-by-side.
61:, via the valve cavity, to exhaust
994:National Museum of Scotland engine
25:
49: through the upper passage
1176:List of steam technology patents
116:, particularly in engines using
41:Steam enters via the steam port
53: to push down the piston
1161:Murdoch's model steam carriage
1147:History of steam road vehicles
1:
1088:Murray's Hypocycloidal Engine
222:Steam locomotive nomenclature
135:
811:Return connecting rod engine
144:Murdoch's long D slide valve
735:Condensing steam locomotive
1233:
1042:"Coalbrookdale Locomotive"
1048:"Pen-y-Darren" locomotive
717:Single- and double-acting
887:Newcomen Memorial Engine
1191:Timeline of steam power
1186:Stationary steam engine
1069:Woolf's compound engine
976:Soho Manufactory engine
831:Steeple compound engine
498:straight line mechanism
152:, or more specifically
136:Murdoch's D slide valve
99:animation can be viewed
1196:Water-returning engine
1170:Lean's Engine Reporter
943:Chacewater Mine engine
816:Six-column beam engine
145:
100:
93:image description page
66:
32:
1036:London Steam Carriage
143:
90:
38:
30:
982:Bradley Works engine
806:Reciprocating engine
629:Babcock & Wilcox
472:Centrifugal governor
179:Balanced slide valve
18:Balanced slide valve
523:Sun and planet gear
127:It is difficult to
1023:Richard Trevithick
621:Water-tube boilers
435:Gresley conjugated
154:Long D slide valve
146:
101:
95:explains how this
67:
33:
1204:
1203:
1130:
1129:
1009:
1008:
693:
692:
593:Fire-tube boilers
448:
447:
16:(Redirected from
1224:
1154:fardier à vapeur
988:Whitbread Engine
949:Smethwick Engine
917:
856:
675:Feedwater heater
543:
325:
269:
262:
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173:steam locomotive
21:
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1055:
1005:
962:
906:
894:Fairbottom Bobs
879:Newcomen engine
873:
845:
791:Expansion valve
764:
750:Watt's separate
721:
689:
663:
615:
587:
532:
508:Parallel motion
444:
395:Stephenson link
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314:
283:Operating cycle
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240:The Slide Valve
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189:Alexander Allan
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158:William Murdoch
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929:Kinneil Engine
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901:Elsecar Engine
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821:Steeple engine
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680:Feedwater pump
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546:Simple boilers
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528:Watt's linkage
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477:Connecting rod
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1217:Engine valves
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1029:Puffing Devil
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1015:High-pressure
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968:Rotative beam
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868:Savery Engine
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841:Working fluid
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518:Rotative beam
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495:hypocycloidal
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276:Steam engines
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202:Corliss valve
200:
199:
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155:
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150:D slide valve
142:
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114:piston valves
111:
103:
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83:
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64:
60:
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52:
48:
44:
37:
29:
19:
1181:Modern steam
1168:
1153:
1115:Porter-Allen
1094:
1028:
955:
935:
892:
826:Safety valve
755:"Pickle-pot"
649:Thimble tube
334:
217:Sleeve valve
212:Poppet valve
207:Piston valve
182:
166:
162:
153:
149:
147:
107:
82:steam engine
70:
68:
62:
58:
54:
50:
46:
42:
912:Watt engine
712:Oscillating
668:Boiler feed
513:Plate chain
492:Tusi couple
405:Walschaerts
290:Atmospheric
169:beam engine
118:superheated
75:rectilinear
71:slide valve
1121:Ljungström
1107:High-speed
1000:Lap Engine
956:Resolution
860:Precursors
745:Kirchweger
707:Locomotive
654:Three-drum
634:Field-tube
601:Locomotive
583:Lancashire
503:Link chain
487:Crankshaft
454:Mechanisms
382:Valve gear
227:Valve gear
1152:Cugnot's
1095:Salamanca
796:Hydrolock
781:Crosshead
727:Condenser
563:Egg-ended
187:engineer
129:lubricate
110:cylinders
1211:Category
1135:See also
1061:Compound
936:Old Bess
776:Blowback
699:Cylinder
685:Injector
644:Stirling
639:Sentinel
553:Haystack
467:Cataract
440:Southern
430:Caprotti
305:Compound
195:See also
185:Scottish
851:History
760:Surface
578:Cornish
538:Boilers
420:Corliss
357:Corliss
340:D slide
310:Uniflow
300:Cornish
1163:(1784)
1157:(1769)
1123:(1908)
1117:(1862)
1098:(1812)
1090:(1805)
1080:Murray
1071:(1803)
1050:(1804)
1044:(1803)
1038:(1803)
1032:(1801)
1002:(1788)
996:(1786)
990:(1785)
984:(1783)
978:(1782)
959:(1781)
951:(1779)
945:(1778)
939:(1777)
931:(1768)
903:(1795)
897:(1760)
889:(1725)
870:(1698)
836:Stroke
801:Piston
786:Cutoff
659:Yarrow
611:Launch
606:Scotch
367:Sleeve
362:Poppet
347:Piston
328:Valves
320:Valves
769:Other
573:Flued
558:Wagon
482:Crank
425:Lentz
415:Baker
410:Allan
335:Slide
78:valve
73:is a
921:Beam
462:Beam
372:Bash
352:Drop
295:Watt
148:The
91:The
69:The
740:Jet
568:Box
400:Joy
390:Gab
104:Use
97:SVG
1213::
84:.
47:SV
43:SP
268:e
261:t
254:v
63:E
59:S
55:P
51:S
20:)
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