Tuning Huma regulator change pressure setting on its own?

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qball

qball

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Apr 13, 2020
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CA, United States
Ok I know my memory isn’t what it use to be but I swear the huma regulator I put in my 1701T was set at 1800 psi. Was shooting it today and noticed POi changed and realized it’s off reg a little. No big deal, pump it up and noticed the pressure gauge which only shows the regulated portion is showing just over 2000 PSI. Weird, so i shot and dry fired till 1500 psi and pump it up again and it went back to just over 2000 psi! Emptied and fill again and it’s still at over 2000 psi!!!



so question is if the pressure fall below reg pressure for a while would the huma regulator increase the reg pressure/setting? It’s about 7-8 months old and never had issues before. I don’t mind the high reg tune but it’s weird that it changes by itself. 
 
#1 reason this "Can" happen is a worn seal disk. This crops up after Many many shots ... Or, if there was no intake bleed damper screw within the adjuster bonnet ?

In servicing what is likely 100+ Humas in past years the o-ring life on the inner spool and adjustment bonnet seldom go much past 4 years before they harden, fracture or start leaking.

* THIS IS NOT a HuMa issue, but one of O-rings used under high pressure and a Dynamic application.
 
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Thanks scott! The regulator is about 7-8 months old at most so should not be oring.....I think. It’s holding very steady at just over 2000 psi so I’m wondering if storing below reg pressure for a few weeks could cause that. I just reset the HS to get my desired speed with higher reg and I’m good with it but just got my curiosity up. Funny thing is I was thinking about raising the regulator so it did it for me......is this a new smart feature? 
 
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According to the guidelines, you have to adjust past the slack of the threads when increasing (or was it decreasing)the pressury setting. That means yoy have first adjust 10 bar higher, than intended, and then just adjust down to the setting you want.If you do not do that, the scale will be more off.
Click to expand...

That would be when increasing to settle the O-ring.
 
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