Supporting > Boilers
Hiraoka Style Sight Glass
steamer:
--- Quote from: Wrecks on March 16, 2024, 01:38:17 PM ---
--- Quote from: uuu on March 16, 2024, 01:00:23 PM ---There are commercial items available, so you can look at the pictures and try and get an idea. https://maccmodels.co.uk/shop/live-steam-fittings/3-cock-water-gauges/1-4-x-40-3-cock-water-gauge-left-hand-2/
These ones use a PTFE seal on the shut-off cocks. The same maker does them with linked levers, so you can shut off both ends at the same time.
They do stick out a bit more than the plain gauges, so potentially it makes them more vulnerable.
You could consider a guard glass instead, to both protect the gauge, and deflect the water-steam in the case of breakage.
Clearly with or without the shut-off cocks, you need a quick way of dousing or dropping the fire. Gauges have been broken at our club and it's not as much of a drama as you might imagine.
Wilf
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I like the guard idea. I might do that. And the not much drama thing is what I was hoping to hear, so I might just leave it alone. Gonna have to think about it, I guess.
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While full scale stop valves are great, getting them to work reliably in scale is a problem. You are much better off with a guard glass and a manual stop valve top and bottom. Small ball checks can get gummed/plugged up and not work correctly in scale. Kozo actually did an article on this and how to handle a broken glass in use, poke around in his book and I'm sure you will find the article.
Dave
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