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[PSUBS-MAILIST] O rings and pressure
Hi, I have a dumb question, I just machined my first sub
part, sort of a test part, a thru hull piece that will have a shaft going thru
it to turn a valve from the inside of the sub to the out side. I machined
an inside groove for an "o" ring, now are there recomended
specs for this "o" ring ? Like so many thousandths thickness
etc.. and should the shaft be notched as well?
Second dumb Question: Is all of your air pressure comming off
the high pressure cylinders (2000 psi) always dropped down to a lower
pressure (200 psi) with a regulator before it is used to blow out a
ballast tank? Is that high pressure too high to use for that (possiblly
freezing up lines?)
Brian Cox