fmerkel
Contributor
I got pounced on in another thread for repeating some nugget I had been told in my reg service class to the effect that piston regs tend to get out of tune more quickly than diaphragm regs. One reply called it "nonsense."
We are subject to our experience the way I see it. But some folks have a little experience and think that gives them lots of credibility. There are folks on this forum that are legions ahead of me in all kinds of areas. Sorting out the true experts from the 'know it alls' is part of the challenge. The longer I work on regs the more I tend to get 'practical' vs. 'technical'.
For getting 'out of tune' I don't have an opinion of piston vs. diaphragm. If you search SB you will sure find a lot of threads on MK 20 creep though. Once that is taken care of the reg seems to do OK, though this particular reg seems to be hell on the piston O-ring also. I'm going to polyurethane next change to see if that helps.
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