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Slide Valve
Slide Valve
Published: 2012/04/27
Channel: TaskForceTips
slide valve and qev airgun
slide valve and qev airgun
Published: 2012/12/11
Channel: Boks725
HOW TO MAKE A STEAM ENGINE SLIDE VALVE - MODEL ENGINEERING FOR BEGINNERS #10
HOW TO MAKE A STEAM ENGINE SLIDE VALVE - MODEL ENGINEERING FOR BEGINNERS #10
Published: 2016/02/16
Channel: Keith Appleton
SLIDE VALVE OPERATION
SLIDE VALVE OPERATION
Published: 2013/10/30
Channel: Vichai K.
Mucon Slide Valve
Mucon Slide Valve
Published: 2012/05/31
Channel: ProcessComponents
valterra pvc slide valve
valterra pvc slide valve
Published: 2013/06/13
Channel: Plastic Pipe Shop Ltd
Series AHS - 3 way 2 position Hand Slide valve
Series AHS - 3 way 2 position Hand Slide valve
Published: 2012/10/02
Channel: Process Systems
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
Published: 2013/04/28
Channel: Wayne Grenning
The First Test, Valve/Slide trumpet: Naga Phoenix
The First Test, Valve/Slide trumpet: Naga Phoenix
Published: 2011/09/28
Channel: schlubme
Vortex Orifice Slide Gate Valve
Vortex Orifice Slide Gate Valve
Published: 2013/12/31
Channel: Vortex - Solids & Bulk Handling Components
Deutz slide valve motor type A
Deutz slide valve motor type A
Published: 2016/03/18
Channel: Rik Lemmens
horizontal slide valve
horizontal slide valve
Published: 2008/08/23
Channel: sx35
CSH Screw Compressor - Slider Valve
CSH Screw Compressor - Slider Valve
Published: 2011/08/26
Channel: BITZERUSaftermarket
TDSH Slide Valve
TDSH Slide Valve
Published: 2013/05/20
Channel: Pilgrim Falcon
PM Research #1 Steam Engine with Slide Valve Action Window!
PM Research #1 Steam Engine with Slide Valve Action Window!
Published: 2017/02/07
Channel: flybob56
How to make a semi-automatic airgun (version 1)
How to make a semi-automatic airgun (version 1)
Published: 2012/03/28
Channel: wyz2285
Maxitrak Slide Valve Setting
Maxitrak Slide Valve Setting
Published: 2012/10/17
Channel: Maxitrak Mes
How Do Slide Gate Valves Work?
How Do Slide Gate Valves Work?
Published: 2011/09/02
Channel: Aerodyne Environmental
1882 Crossley Slide Valve Start-up first time
1882 Crossley Slide Valve Start-up first time
Published: 2016/02/21
Channel: Wayne Grenning
Pentair Slide Valve 261165 263064
Pentair Slide Valve 261165 263064
Published: 2013/03/29
Channel: PoguePoolSpa.com
Schmidscher Wassermotor Nr.5 Bj. 1871 Water slide Valve Engine
Schmidscher Wassermotor Nr.5 Bj. 1871 Water slide Valve Engine
Published: 2015/08/08
Channel: Thomas Lange
Crossley piano base slide-valve engine  (high quality vision)
Crossley piano base slide-valve engine (high quality vision)
Published: 2014/04/22
Channel: Patrick Livingstone
Vortex Roller Slide Gate Valve
Vortex Roller Slide Gate Valve
Published: 2013/12/31
Channel: Vortex - Solids & Bulk Handling Components
Vission 20/20 Slide Valve Calibration
Vission 20/20 Slide Valve Calibration
Published: 2013/05/01
Channel: Emerson Commercial and Residential Solutions
Prototype Slide Valve Steam Engine
Prototype Slide Valve Steam Engine
Published: 2016/01/30
Channel: 1957Shep
Crossley Slide Valve
Crossley Slide Valve
Published: 2015/06/20
Channel: steamer123
Otto Slide Valve engine
Otto Slide Valve engine
Published: 2007/10/21
Channel: Wayne Grenning
Our new slide valve engine
Our new slide valve engine
Published: 2015/05/17
Channel: John Palmer
Vilter™ Single Screw Compressor Slide Valve Installation
Vilter™ Single Screw Compressor Slide Valve Installation
Published: 2014/04/29
Channel: Emerson Commercial and Residential Solutions
Hand Scraped cast iron slide valve demonstrating  lack of frictional force with a static oil film
Hand Scraped cast iron slide valve demonstrating lack of frictional force with a static oil film
Published: 2015/11/28
Channel: Wayne Grenning
R V Holding Tank -  Slide Valve Replacement
R V Holding Tank - Slide Valve Replacement
Published: 2016/07/08
Channel: BillGoudy
Disassembling mercedes benz Auxiliary Air Valve AKA Air Slide Valve Part 1
Disassembling mercedes benz Auxiliary Air Valve AKA Air Slide Valve Part 1
Published: 2012/02/02
Channel: Mike Wade
Slide Valves VL VDI
Slide Valves VL VDI
Published: 2012/11/19
Channel: wamgroupspa
tapco slide valve
tapco slide valve
Published: 2015/12/11
Channel: kogela100
New Slide Fuel Valve
New Slide Fuel Valve
Published: 2016/02/27
Channel: Жизнь прекрасна
Hot stroke test  of a FCCU high temperature slide valve @ 750 degrees Celsius.
Hot stroke test of a FCCU high temperature slide valve @ 750 degrees Celsius.
Published: 2016/06/29
Channel: Delta Controls BV
Part 38 - PM #3 Steam Engine-Slide Valve
Part 38 - PM #3 Steam Engine-Slide Valve
Published: 2012/03/17
Channel: W5CYF / TinkerJohn
3 1/2 HP Crossley Slide Valve Restroration Animation
3 1/2 HP Crossley Slide Valve Restroration Animation
Published: 2014/07/17
Channel: Wayne Grenning
Burrell Slide Valve Faces
Burrell Slide Valve Faces
Published: 2013/04/04
Channel: MWSteamEngineering
Superbone ( slide/valve trombone )
Superbone ( slide/valve trombone )
Published: 2007/01/26
Channel: basunfan
Shooting my new QEV slide valve air gun
Shooting my new QEV slide valve air gun
Published: 2014/12/27
Channel: wolfgangdeath22
Slide piston valve
Slide piston valve
Published: 2017/04/15
Channel: MamodSteamModels
The evolution of my QEV slide valve Airgun
The evolution of my QEV slide valve Airgun
Published: 2014/12/29
Channel: wolfgangdeath22
Perin Panhard slide valve gas engine
Perin Panhard slide valve gas engine
Published: 2012/09/15
Channel: crossleyl
slide valve steam engine
slide valve steam engine
Published: 2011/01/28
Channel: tank1es
Hand Slide Valve Suppliers
Hand Slide Valve Suppliers
Published: 2016/09/04
Channel: Joy Z
Low Profile Slide Valves VIB – Seal Replacement
Low Profile Slide Valves VIB – Seal Replacement
Published: 2015/10/28
Channel: wamgroupspa
29-Slide Valve | Steam Engine | ( Catia )
29-Slide Valve | Steam Engine | ( Catia )
Published: 2014/09/07
Channel: Engineering Design
Functioning of Slide Fuel Valve
Functioning of Slide Fuel Valve
Published: 2011/07/11
Channel: Aayushman Singh
Slide Valve Upgrade for Cereal Cookers
Slide Valve Upgrade for Cereal Cookers
Published: 2014/10/22
Channel: Baker Perkins
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WIKIPEDIA ARTICLE

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 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.

See also[edit]

External links[edit]

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