<div dir="auto">Hi Alan, the yoke that is attached to my hp air tank has a bleeder valve as part of the yoke, then a shut off valve prior to entering the pressure hull. Procedure for tank change out, shut valve, open bleed valve, then remove yoke. I dont have the same type of setup for my o2 tanks though as there is no hidden pressure zone.<div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Mar 28, 2019, 9:06 PM Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
Just wondering if people use / have an external valve to purge air / O2 from the <br>
system to enable the removal of the first stage yoke from the tank.<br>
With a dive set up you just press the second stage purge valve.<br>
Alan<br>
<br>
<br>
<br>
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