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Post by sanddancer on Mar 19, 2008 7:34:48 GMT
Hi there,
on inspection of my newly axquired part built Simplex chassis & boiler I was puzzled to find that although the boiler has obviously been steamed before, there was no top water gauge fitting. After hours of pondering, I realized that the only conclusion possible was the gauge top connection had been fitted to the steam manifold, which is not present. This is a professionally made boiler that had been hydraulically tested, which would be pointless if you then needed to drill and silver solder another bush to the shell. I know that with full size boilers the water gauges have dedicated fittings, but is it acceptable to have the top gauge connection fitted to the steam manifold with a model boiler? If it is permissible, then it negates the necessity to potentially weaken the shell by introducing another hole, but I have my doubts about this! Any comment would be appreciated,
regards,
George
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Post by baggo on Mar 19, 2008 10:55:13 GMT
Hi George,
the top fitting of the gauge could be connected to the turret but I can forsee problems with the water level in the gauge jumping about all over the place when one of the steam valves is opened.
The top fitting on Simplex has an elbow that just screws into a tapped hole on the top of the boiler which is probably why it hadn't been done when the boiler was built. This method is common practice and won't compromise the strength of the boiler shell. What I do is, once the elbow is lined up properly, I seal it in place permanently with high melting point soft solder (Comsol)
John
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Post by sanddancer on Mar 19, 2008 17:41:31 GMT
Hi John,
yes, I read your input on gauge fittings, & I know that the modern practice is to fit that sticky up fitting. I was just puzzled about why that hadn't been done with this one. I agree that it is a bad idea, but I still remember the old maxim, every hole in a boiler shell is a potential weakness. The boiler is probably quite old, & things have moved on, so I think that I will make the unit shown on drawing 4. I have already ordered a bit of bronze pb102 to make it with,
regards,
George
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