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> | |||
== See also == | |||
Articles on Safety Valves: | Articles on Safety Valves: | ||
Revision as of 16:00, 8 July 2016
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
See also
Articles on Safety Valves: