1
Slide Valve
Slide Valve
DATE: 2012/04/27::
2
Series AHS - 3 way 2 position Hand Slide valve
Series AHS - 3 way 2 position Hand Slide valve
DATE: 2012/10/02::
3
slide valve and qev airgun
slide valve and qev airgun
DATE: 2012/12/10::
4
TDSH Slide Valve
TDSH Slide Valve
DATE: 2013/05/19::
5
Mucon Slide Valve
Mucon Slide Valve
DATE: 2012/05/31::
6
How Do Slide Gate Valves Work?
How Do Slide Gate Valves Work?
DATE: 2011/09/02::
7
Our new slide valve engine
Our new slide valve engine
DATE: 2015/05/17::
8
Superbone ( slide/valve trombone )
Superbone ( slide/valve trombone )
DATE: 2007/01/26::
9
horizontal slide valve
horizontal slide valve
DATE: 2008/08/23::
10
Part 38 - PM #3 Steam Engine-Slide Valve
Part 38 - PM #3 Steam Engine-Slide Valve
DATE: 2012/03/17::
11
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
DATE: 2013/04/28::
12
Double Block & Bleed Parallel Slide Gate Valve
Double Block & Bleed Parallel Slide Gate Valve
DATE: 2013/08/23::
13
Maxitrak Slide Valve Setting
Maxitrak Slide Valve Setting
DATE: 2012/10/17::
14
Double Acting Slide Valve Model Steam Engine
Double Acting Slide Valve Model Steam Engine
DATE: 2009/03/01::
15
Otto Slide Valve engine
Otto Slide Valve engine
DATE: 2007/10/21::
16
Pentair Slide Valve 261165 263064
Pentair Slide Valve 261165 263064
DATE: 2013/03/29::
17
The First Test, Valve/Slide trumpet: Naga Phoenix
The First Test, Valve/Slide trumpet: Naga Phoenix
DATE: 2011/09/28::
18
Gas  engine,Crossley Otto, Otto slide valve.
Gas engine,Crossley Otto, Otto slide valve.
DATE: 2010/02/14::
19
Forest Flame Ignition Slide Valve Reproduction Engines Grenning Models 2014
Forest Flame Ignition Slide Valve Reproduction Engines Grenning Models 2014
DATE: 2014/09/28::
20
Otto Slide Valve 4 cycle carrier flame ignition test engine
Otto Slide Valve 4 cycle carrier flame ignition test engine
DATE: 2013/02/09::
21
Scraping Slide Valve Cover
Scraping Slide Valve Cover
DATE: 2013/03/12::
22
CSH Screw Compressor - Slider Valve
CSH Screw Compressor - Slider Valve
DATE: 2011/08/26::
23
Twin Cylinder Slide Valve engine
Twin Cylinder Slide Valve engine
DATE: 2015/06/19::
24
Crossley Slide Valve
Crossley Slide Valve
DATE: 2015/06/20::
25
Two Cylinder Slide Valve Steam Engine Crankshaft: Video #1
Two Cylinder Slide Valve Steam Engine Crankshaft: Video #1
DATE: 2010/07/27::
26
Hille Motor Schieber Gasmotor slide valve stationary gas engine
Hille Motor Schieber Gasmotor slide valve stationary gas engine
DATE: 2013/04/09::
27
First Unrestored Run - 125 year old 1889 Schleicher Schumm Slide Valve Otto
First Unrestored Run - 125 year old 1889 Schleicher Schumm Slide Valve Otto
DATE: 2014/05/16::
28
Crossley piano base slide-valve engine
Crossley piano base slide-valve engine
DATE: 2014/04/22::
29
QEV + homemade slide valve.
QEV + homemade slide valve.
DATE: 2012/09/13::
30
D-(Slide) Valve on 1870s Planer
D-(Slide) Valve on 1870s Planer
DATE: 2007/09/08::
31
Vission 20/20 Slide Valve Calibration
Vission 20/20 Slide Valve Calibration
DATE: 2013/05/01::
32
Forest slide valve carrier flame igniton engine .
Forest slide valve carrier flame igniton engine .
DATE: 2012/06/15::
33
Comparison: Trumpet, Slide Trumpet, Valve Trombone, Slide Trombone, Flute & Flugel
Comparison: Trumpet, Slide Trumpet, Valve Trombone, Slide Trombone, Flute & Flugel
DATE: 2014/07/09::
34
TWO CYLINDER SLIDE VALVE STEAM ENGINE CRANKSHAFT: VIDEO #2
TWO CYLINDER SLIDE VALVE STEAM ENGINE CRANKSHAFT: VIDEO #2
DATE: 2010/07/29::
35
Warchalowski,Stationärmotor,stationary engine,slide valve,Schiebermotor
Warchalowski,Stationärmotor,stationary engine,slide valve,Schiebermotor
DATE: 2014/10/12::
36
Filter Backwash Valve Leaking or Stiff -Replacing the Stem O-rings
Filter Backwash Valve Leaking or Stiff -Replacing the Stem O-rings
DATE: 2014/08/30::
37
Vilter™ Single Screw Compressor Slide Valve Installation
Vilter™ Single Screw Compressor Slide Valve Installation
DATE: 2014/04/29::
38
Slide Valve Dual Oscillator Steam Engine 1 of ?
Slide Valve Dual Oscillator Steam Engine 1 of ?
DATE: 2006/09/02::
39
Trumpet - why you should use the 3rd valve slide
Trumpet - why you should use the 3rd valve slide
DATE: 2013/02/12::
40
Crossley Slide Valve at Lucke Open House
Crossley Slide Valve at Lucke Open House
DATE: 2011/10/04::
41
Martini Slide Valve Flame Ignition Engine at 2013 Nuenen
Martini Slide Valve Flame Ignition Engine at 2013 Nuenen
DATE: 2013/05/19::
42
Shooting my new QEV slide valve air gun
Shooting my new QEV slide valve air gun
DATE: 2014/12/27::
43
Slide Valve Engine Rare 2 Cylinder under Load
Slide Valve Engine Rare 2 Cylinder under Load
DATE: 2013/08/12::
44
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
DATE: 2012/08/20::
45
Coolspring June 2015 Hille push rod slide valve  at the Flame Expo
Coolspring June 2015 Hille push rod slide valve at the Flame Expo
DATE: 2015/06/25::
46
Crossley slide valve being loaded
Crossley slide valve being loaded
DATE: 2013/05/17::
47
8 Hp Schleicher Schumm Slide Valve Otto Start Up
8 Hp Schleicher Schumm Slide Valve Otto Start Up
DATE: 2009/06/22::
48
Redesigning a vertical slide valve steam engine - Phase Two.
Redesigning a vertical slide valve steam engine - Phase Two.
DATE: 2009/10/02::
49
Fantastic Scale model of a Deutz slide valve with working flame ignition
Fantastic Scale model of a Deutz slide valve with working flame ignition
DATE: 2013/05/20::
50
10 HP Schleicher Schumm Slide Valve  Start-up April 21st 2013
10 HP Schleicher Schumm Slide Valve Start-up April 21st 2013
DATE: 2013/04/22::
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RESULTS [51 .. 101]
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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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