Detuning a regulator for octoups duty?

[scrane]

I bought a nice Atomic Z1 to team up with my Z2 as a safe second. Straight off it free flows on a boat entry with the adjuster all the way in. Not a big deal, but a little annoying.
Can/should I detune this reg to not be so jumpy? Should I adjust the poppet spring pressure, or the orifice position in slightly or maybe a little of both? As it stands it is a nice, easy breather. The Atomic has an automatic venturi that is not user adjustable.
Thanks.

 

[lexvil]

You need a new seat.

 

[scrane]

Under normal conditions it is air tight. On entry impact it will lock into full flow until I block the mouthpiece. But I can give it a rebuild.

 

[BoltSnap]

I use two ST1 second stages and I never have a problem with free flowing back up when knob turned in all the way (back up is not detuned at all and is adjusted the same as the primary). You need a tech. to check the Z1 second stage.

 

[scrane]

I have subsequently found in Atomic documentation that the Z1 should be set up to break at 1.1"-1.4" H2O while the SS1 is speced at 1.2"-1.8". Setting the Z1 at 1.8" with the adjuster out should work for me.

 

[rhwestfall]

What is it currently set at (adjuster all the way out, and all the way in)?

 

[RyanT]

My B2 tends to free flow on impact after a giant stride, unless I have it dialed all the way in. Since you've got it already dialed back, I would definitely detune it a bit more.

 

[grf88]

You need a new seat.

????????

 

[AfterDark]

I use on/off valves on all of my second stages. Like this: Regulator Shut Off Adapter "long Type 2 7/8" , Piranha Dive Shop | (piranhadivemfg.com)

 

[rhwestfall]

????????

I'd think it likely he feels the soft seat had indented, and thus is holding seal less than it should.