Now, this may be considered a little out of the engineer's
duty, but it will save lots of annoyance if he has his tank supplied
with this little appliance, which is simple but does the business.
A boiler should be washed out and not blown out, I believe I am safe in
saying that more than half the engineers of threshing engines today
depend on the "blowing out" process to clean their boilers. I don't
intend to tell you to do anything without giving my reasons. We will
take a hot boiler, for instance; say, 50 pounds steam. We will, of
course, take out the fire. It is not supposed that anyone will attempt
to blow out the water with any fire in the firebox. We will, after
removing the fire, open the blow-off valve, which will be found at the
bottom or lowest water point. The water is forced out very rapidly with
this pressure, and the last thing that comes out is the steam. This
steam keeps the entire boiler hot till everything is blown out, and the
result is that all the dirt, sediment and lime is baked solid on the
tubes and side of firebox. But you say you know enough to not blow off
at 50 pounds pressure.
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