Safety valve: Difference between revisions
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[[Category:Steam Locomotive Parts]] | [[Category:Steam Locomotive Parts]] | ||
== | == Operation == | ||
[http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=76322 Bill Shields provided this description on <i>Chaski.org</i>]: | |||
: Figure 1: The steam running past the ball now puts pressure on the ENTIRE ball, rather than just the 'sealing face'. The discharging steam is contained in an annular ring that keeps the pressure ABOVE atmospheric...how much above is adjustable. This adjustment, combined with the total area of the ball exposed to the now flowing steam, keeps the ball 'up' | |||
: Figure 3: Not all valves have these balls. I personally like valves with more of an industrial poppet type of seat (Figure 2), that is guided both top and bottom...makes me a bit more comfortable... | |||
<gallery widths="400px" heights="400px" perrow="2"> | |||
File:SafetyValve1 BillSheilds.jpg|Figure 1 | |||
File:SafetyValve2 BillSheilds.jpg|Figure 2 | |||
File:SafetyValve3 BillSheilds.jpg|Figure 3 | |||
</gallery> | |||
== Greenly Design == | |||
<gallery widths=300px heights=300px perrow=2> | |||
File:Henry Greenly Northern-Hudson throttle and safety valves.jpg|Safety valve design from Henry Greenly's 1.6 inch scale Northern/Hudson. | |||
</gallery> | |||
== See also == | |||
Articles on Safety Valves: | |||
* [[Beginner's Locomotive Safety Valve]] | |||
== External Link == | |||
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=98707&sid=15c11f6a1b82a2434ee391d14f36b9a4 "Getting rid of safety valve buzzing", <i>Chaski.org</i>] | * [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=98707&sid=15c11f6a1b82a2434ee391d14f36b9a4 "Getting rid of safety valve buzzing", <i>Chaski.org</i>] | ||
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=97717&start=12 "Pop Off Valves", <i>Chaski.org</i>] | |||
* [https://grabcad.com/library/steam-engine--28 3D CAD files for Safety valve] | |||
* [https://grabcad.com/library/safety-valve-for-live-steam-locomotive 3D CAD files for 2-1/2 inch scale Safety valve] | |||
Latest revision as of 11:57, 22 November 2019
Operation
Bill Shields provided this description on Chaski.org:
- Figure 1: The steam running past the ball now puts pressure on the ENTIRE ball, rather than just the 'sealing face'. The discharging steam is contained in an annular ring that keeps the pressure ABOVE atmospheric...how much above is adjustable. This adjustment, combined with the total area of the ball exposed to the now flowing steam, keeps the ball 'up'
- Figure 3: Not all valves have these balls. I personally like valves with more of an industrial poppet type of seat (Figure 2), that is guided both top and bottom...makes me a bit more comfortable...
Figure 1
Figure 2
Figure 3
Greenly Design
Safety valve design from Henry Greenly's 1.6 inch scale Northern/Hudson.
See also
Articles on Safety Valves: