Pressure gauge: Difference between revisions
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[[Category:Steam Locomotive Parts]] | [[Category:Steam Locomotive Parts]] | ||
== Syphon == | |||
[[File:ShayBackheadShowingGaugeSyphon Nelson.JPG|thumb|right|300px|Shay backhead showing the syphon protecting the [[Pressure gauge|pressure gauge]].]] | [[File:ShayBackheadShowingGaugeSyphon Nelson.JPG|thumb|right|300px|Shay backhead showing the syphon protecting the [[Pressure gauge|pressure gauge]].]] | ||
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: Answer: The gauge will work OK, but you need to be sure to have a loop, aka "syphon", in the tubing going to the gauge, to keep the hot steam from entering the gauge directly. The syphon will fill with condensed water, so steam does does not enter the gauge directly from the boiler. | : Answer: The gauge will work OK, but you need to be sure to have a loop, aka "syphon", in the tubing going to the gauge, to keep the hot steam from entering the gauge directly. The syphon will fill with condensed water, so steam does does not enter the gauge directly from the boiler. | ||
== Support == | |||
[http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=91823&p=231589&hilit=syphon#p231589 Clica] posted on <i>Chaski.org</i>]: | |||
: A State of Michigan deputy boiler inspector told me that you must NOT support the gauge by the syphon pipe. The gauge must have a separate means of support. This is also a requirement on the prototype. | |||
Harold replied: | |||
: That's just good sense. If a gauge is mounted by the pipe, vibration will work harden the copper, eventually leading to the pipe breaking. | |||
== External Links == | == External Links == | ||
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* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=90698&hilit=+gauge+face+ "Steam gauge face", <i>Chaski.org</i>] | * [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=90698&hilit=+gauge+face+ "Steam gauge face", <i>Chaski.org</i>] | ||
* [https://en.wikipedia.org/wiki/Pressure_measurement "Pressure measurement", <i>Wikipedia</i>] | * [https://en.wikipedia.org/wiki/Pressure_measurement "Pressure measurement", <i>Wikipedia</i>] | ||
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=97402&p=291081&hilit=syphon#p291081 "Gauge Syphon tubes", <i>Chaski.org</i>] | |||
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=79392&hilit=syphon "Pressure Gauge Syphon", <i>Chaski.org</i>] | |||
* [http://www.chaski.org/homemachinist/viewtopic.php?f=8&t=74199&p=81549&hilit=syphon#p81549 "syphon line and seating check balls", <i>Chaski.org</i>] | |||
Latest revision as of 14:20, 2 December 2015
Syphon
Shay backhead showing the syphon protecting the pressure gauge.
From Chaski.org
- Question: I have a pressure gauge designed for air compressors. Can I use this same gauge with steam?
- Answer: The gauge will work OK, but you need to be sure to have a loop, aka "syphon", in the tubing going to the gauge, to keep the hot steam from entering the gauge directly. The syphon will fill with condensed water, so steam does does not enter the gauge directly from the boiler.
Support
Clica posted on Chaski.org]:
- A State of Michigan deputy boiler inspector told me that you must NOT support the gauge by the syphon pipe. The gauge must have a separate means of support. This is also a requirement on the prototype.
Harold replied:
- That's just good sense. If a gauge is mounted by the pipe, vibration will work harden the copper, eventually leading to the pipe breaking.