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1
slide valve and qev airgun
slide valve and qev airgun
::2012/12/10::
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2
Slide Valve
Slide Valve
::2012/04/27::
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3
Mucon Slide Valve
Mucon Slide Valve
::2012/05/31::
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4
AHS02 Hand Slide valve
AHS02 Hand Slide valve
::2012/10/02::
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5
valterra pvc slide valve
valterra pvc slide valve
::2013/06/13::
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6
horizontal slide valve
horizontal slide valve
::2008/08/23::
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7
CSH Screw Compressor - Slider Valve
CSH Screw Compressor - Slider Valve
::2011/08/26::
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8
Maxitrak Slide Valve Setting
Maxitrak Slide Valve Setting
::2012/10/17::
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9
Superbone ( slide/valve trombone )
Superbone ( slide/valve trombone )
::2007/01/26::
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10
Part 38 - PM #3 Steam Engine-Slide Valve
Part 38 - PM #3 Steam Engine-Slide Valve
::2012/03/17::
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11
CGI 3D Slide Valve Animation for 1883 10 Hp Schleicher Schumm Flame Ignition Engine
CGI 3D Slide Valve Animation for 1883 10 Hp Schleicher Schumm Flame Ignition Engine
::2012/08/20::
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12
Pentair Slide Valve 261165 263064
Pentair Slide Valve 261165 263064
::2013/03/29::
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13
How Do Slide Gate Valves Work?
How Do Slide Gate Valves Work?
::2011/09/02::
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14
Crossley piano base slide-valve engine
Crossley piano base slide-valve engine
::2014/04/22::
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15
Forest slide valve carrier flame igniton engine .
Forest slide valve carrier flame igniton engine .
::2012/06/15::
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16
Sliding stem valve travel demonstration
Sliding stem valve travel demonstration
::2010/01/15::
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17
Crossley Slide Valve flame ignition engine
Crossley Slide Valve flame ignition engine
::2014/09/21::
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18
Otto Slide Valve 4 cycle carrier flame ignition test engine
Otto Slide Valve 4 cycle carrier flame ignition test engine
::2013/02/09::
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19
TDSH Slide Valve
TDSH Slide Valve
::2013/05/19::
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20
Vilter™ Single Screw Compressor Slide Valve Installation
Vilter™ Single Screw Compressor Slide Valve Installation
::2014/04/29::
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21
1889 Schleicher Schumm slide valve Otto 2nd unrestored run
1889 Schleicher Schumm slide valve Otto 2nd unrestored run
::2014/05/18::
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22
TWO CYLINDER SLIDE VALVE STEAM ENGINE CRANKSHAFT: VIDEO #2
TWO CYLINDER SLIDE VALVE STEAM ENGINE CRANKSHAFT: VIDEO #2
::2010/07/29::
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23
Lubricating a Slide Valve
Lubricating a Slide Valve
::2012/06/14::
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24
Double Block & Bleed Parallel Slide Gate Valve
Double Block & Bleed Parallel Slide Gate Valve
::2013/08/23::
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25
QEV + homemade slide valve.
QEV + homemade slide valve.
::2012/09/13::
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26
10 HP Schleicher Schumm slide valve engine Start up week 2 after slide modification, re-rescraping
10 HP Schleicher Schumm slide valve engine Start up week 2 after slide modification, re-rescraping
::2013/04/28::
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27
1888 Crossley-Otto Slide Valve Piano Base Engine - Brings $320,000 at Aumann Auctions
1888 Crossley-Otto Slide Valve Piano Base Engine - Brings $320,000 at Aumann Auctions
::2012/12/03::
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28
8 HP 1889 Schleicher Schumm Slide Valve Start up Sn 3211
8 HP 1889 Schleicher Schumm Slide Valve Start up Sn 3211
::2014/05/25::
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29
Hille Motor Schieber Gasmotor slide valve stationary gas engine
Hille Motor Schieber Gasmotor slide valve stationary gas engine
::2013/04/09::
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30
Trumpet - why you should use the 3rd valve slide
Trumpet - why you should use the 3rd valve slide
::2013/02/12::
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31
My New Twin Cylinder Slide Valve Steam Engine - Bottom Half!
My New Twin Cylinder Slide Valve Steam Engine - Bottom Half!
::2010/12/04::
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32
Forest Flame Ignition Slide Valve Reproduction Engines Grenning Models 2014
Forest Flame Ignition Slide Valve Reproduction Engines Grenning Models 2014
::2014/09/28::
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33
Crossley Piano Base Slide Valve Engine From Anson displayed at the 2013 Nuenen Rally
Crossley Piano Base Slide Valve Engine From Anson displayed at the 2013 Nuenen Rally
::2013/05/22::
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34
Machining flywheels in place on a 1884 Slide Valve Otto
Machining flywheels in place on a 1884 Slide Valve Otto
::2012/08/15::
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35
slide valve steam engine
slide valve steam engine
::2011/01/28::
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36
2nd  video of the slide valve flame ignition test engine
2nd video of the slide valve flame ignition test engine
::2013/02/09::
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37
Martini Slide Valve Flame Ignition Engine at 2013 Nuenen
Martini Slide Valve Flame Ignition Engine at 2013 Nuenen
::2013/05/19::
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38
Film 1 of 2 Twin Cylinder 4 HP Deutz slide valve Special Dynamo service
Film 1 of 2 Twin Cylinder 4 HP Deutz slide valve Special Dynamo service
::2013/05/22::
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39
Film 2 of 2 Twin Cylinder 4 HP Deutz slide valve Special Dynamo service start up
Film 2 of 2 Twin Cylinder 4 HP Deutz slide valve Special Dynamo service start up
::2013/05/22::
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40
Gas  engine,Crossley Otto, Otto slide valve.
Gas engine,Crossley Otto, Otto slide valve.
::2010/02/14::
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41
Crossley slide valve being loaded
Crossley slide valve being loaded
::2013/05/17::
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42
Steam tram powering home made slide valve engine
Steam tram powering home made slide valve engine
::2013/06/18::
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43
First Start - 8Hp Schleicher Schumm Slide Valve Otto
First Start - 8Hp Schleicher Schumm Slide Valve Otto
::2009/07/03::
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44
Vission 20/20 Slide Valve Calibration
Vission 20/20 Slide Valve Calibration
::2013/05/01::
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45
First Unrestored Run - 125 year old 1889 Schleicher Schumm Slide Valve Otto
First Unrestored Run - 125 year old 1889 Schleicher Schumm Slide Valve Otto
::2014/05/16::
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46
4 HP Slide Valve Otto Special Electric
4 HP Slide Valve Otto Special Electric
::2011/08/19::
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47
Hille Inverted Flame Ignition Slide Valve Engine at 2013 Nuenen
Hille Inverted Flame Ignition Slide Valve Engine at 2013 Nuenen
::2013/05/20::
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48
1884 10 HP Schleicher Slide Valve - Restoration Complete -  Test Run at 75 RPM
1884 10 HP Schleicher Slide Valve - Restoration Complete - Test Run at 75 RPM
::2013/07/28::
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49
10 HP Schleicher Schumm Slide Valve  Start-up April 21st 2013
10 HP Schleicher Schumm Slide Valve Start-up April 21st 2013
::2013/04/22::
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50
Two Cylinder Slide Valve Steam Engine Crankshaft: Video #1
Two Cylinder Slide Valve Steam Engine Crankshaft: Video #1
::2010/07/27::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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Cylinder, with slide valve removed to show ports
A double-acting slide valve cylinder.
Steam enters via the steam port SP, and is admitted by the slide valve SV  through the upper passage S  to push down the piston P. At the same time, exhaust steam from below the piston passes back up the lower passage S, via the valve cavity, to exhaust E. As the piston descends, the valve moves upwards to admit steam below the piston and release exhaust from above.

The slide valve is a rectilinear valve used to control the admission of steam into, and emission of exhaust from, the cylinder of a steam engine.

The image description page explains how this SVG animation can be viewed

Use[edit]

In the 19th century, most steam locomotives used slide valves to control the flow of steam into and out of the cylinders. In the 20th century, slide valves were gradually superseded by piston valves, particularly in engines using superheated steam. There were two reasons for this:

  • With piston valves, the steam passages can be made shorter. This reduces resistance to the flow of steam and improves efficiency.
  • It is difficult to lubricate slide valves adequately in the presence of superheated steam.

Murdoch's D slide valve[edit]

Murdoch's long D slide valve

The D slide valve, or more specifically Long D slide valve, is a form of slide valve, invented by William Murdoch and patented in 1799. It is named after the hollow central D-sectioned piston.

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.

The above description (referring to upper and lower valves) clearly relates to an engine with a vertical cylinder, such as a beam engine. Where the cylinders are horizontal, as in a steam locomotive, the valves would be side-by-side.

Balanced slide valve[edit]

The balanced slide valve was invented by the Scottish engineer Alexander Allan. It was not much used in the UK but, at one time, had great popularity in the USA. 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.

See also[edit]

External links[edit]

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