<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1412640567859_8451" dir="ltr"><span id="yui_3_16_0_1_1412640567859_8662">Perhaps a bolt with O-ring seal in a spare <span id="misspell-0" class=""><span id="yui_3_16_0_1_1412640567859_8719">accessible</span></span> through hull,</span></div><div id="yui_3_16_0_1_1412640567859_8451" dir="ltr"><span id="yui_3_16_0_1_1412640567859_8459">& a correct sized spanner on the support vessel.</span></div><div id="yui_3_16_0_1_1412640567859_8451" dir="ltr"><span id="yui_3_16_0_1_1412640567859_8976">Or an external means of pulling open the over expansion valve, as</span></div><div id="yui_3_16_0_1_1412640567859_8451" dir="ltr"><span>the force needed would be a lot less than for the hatch.</span></div><div id="yui_3_16_0_1_1412640567859_8451" dir="ltr"><span>Alan</span></div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1412640567859_8454"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1412640567859_8453"> <div dir="ltr" id="yui_3_16_0_1_1412640567859_8452"> <hr size="1" id="yui_3_16_0_1_1412640567859_8461"> <font size="2" face="Arial" id="yui_3_16_0_1_1412640567859_8455"> <b><span style="font-weight:bold;">From:</span></b> Hugh Fulton via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> 'Personal Submersibles General Discussion' <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, October 7, 2014 12:49 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] bellows add<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1412640567859_8462"><br><div id="yiv2900744651"><style>#yiv2900744651 #yiv2900744651 --
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#yiv2900744651 </style><div id="yui_3_16_0_1_1412640567859_8466"><div class="yiv2900744651WordSection1" id="yui_3_16_0_1_1412640567859_8465"><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8464"><span style="font-size:11.0pt;" id="yui_3_16_0_1_1412640567859_8463">Mmmm must get some “Don’t drill here” stickers for the expensive ones.</span></div><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8467"><span style="font-size:11.0pt;"> </span></div><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8661"><span style="font-size:11.0pt;"> </span></div><div id="yui_3_16_0_1_1412640567859_8469"><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm;" id="yui_3_16_0_1_1412640567859_8468"><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8470"><b><span style="font-size:10.0pt;">From:</span></b><span style="font-size:10.0pt;" id="yui_3_16_0_1_1412640567859_8660"> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Sean T. Stevenson via Personal_Submersibles<br clear="none"><b id="yui_3_16_0_1_1412640567859_8825">Sent:</b> Tuesday, 7 October 2014 12:24 p.m.<br clear="none"><b id="yui_3_16_0_1_1412640567859_8826">To:</b> Personal Submersibles General Discussion<br clear="none"><b id="yui_3_16_0_1_1412640567859_8827">Subject:</b> Re: [PSUBS-MAILIST] bellows add</span></div></div></div><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8471"> </div><div id="yui_3_16_0_1_1412640567859_8472">In a rescue or recovery scenario with obviously disabled occupants (Thinking hypercapnia, hypoxia, cardiac arrest, etc.)? Get it open no matter what it takes. I'd probably look to loosen a fitting first, but in the absence of anything obvious, drilling a hole in an acrylic viewport takes no time at all.</div><div id="yui_3_16_0_1_1412640567859_8473">Sean</div><div class="yiv2900744651MsoNormal" style="margin-bottom:12.0pt;" id="yui_3_16_0_1_1412640567859_8474"> </div><div id="yui_3_16_0_1_1412640567859_8659"><div class="yiv2900744651MsoNormal" id="yui_3_16_0_1_1412640567859_8658">On October 6, 2014 4:59:56 PM MDT, Hugh Fulton via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</div><pre><br clear="none">A point that I have been pondering is that DW's pull a vacuum and I plan to<br clear="none">pull a vacuum as is also possible with any other system. My question is in<br clear="none">the event of an emergency where the Sub is on the surface or brought to the<br clear="none">surface with an unconscious bod inside and a vacuum, then what methods are<br clear="none">available to get air back inside to allow surface support to get the hatch<br clear="none">to open. With a vacuum then it would be almost impossible to open the hatch<br clear="none">against the vacuum. Positive pressure is not a problem as a relief valve<br clear="none">will compensate automatically. If the relief valve is easily accessible<br clear="none">then it can be unscrewed. What others are being used? Hugh<br clear="none"><br clear="none"><br clear="none"><br clear="none">-----Original Message-----<br clear="none">From: Personal_Submersibles [<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles-bounces@psubs.org" target="_blank" href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>]<br clear="none">On Behalf Of hank pronk via Personal_Submersibles<br clear="none">Sent: Tuesday, 7 October 2014 11:27 a.m.<br clear="none">To: Personal Submersi!</pre><pre> bles</pre><pre>General Discussion<br clear="none">Subject: Re: [PSUBS-MAILIST] bellows add<br clear="none"><br clear="none"><br clear="none">Alan,<br clear="none">I am sure they have a system that reacts to high O2 levels etc etc I think<br clear="none">my situation is unique and a bellows add does not makes sense.<br clear="none">Hank</pre><pre style="text-align:center;"></pre><hr align="center" size="2" width="100%"><pre><br clear="none">On Mon, 10/6/14, Alan James via Personal_Submersibles<br clear="none"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"><br clear="none"> Subject: Re: [PSUBS-MAILIST] bellows add<br clear="none"> To: "Personal Submersibles General Discussion"<br clear="none"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> Received: Monday, October 6, 2014, 6:19 PM<br clear="none"> <br clear="none"> I agree<br clear="none"> Hank,I think<br clear="none"> you should email Phil & warn him:)I have thought that if there was an air<br clear="none">leak in to the cabin the bellows add systemwould stop adding O2. They have<br clear="none">a manual system integrated into the bellows addunit & a continual feed of<br clear="none">O2 regardless of the belows. They would have O2 monitorswith set point<br clear="none">alarms if the O2 % was too high or low but how the!</pre><pre> y would</pre><pre>address analarm<br clear="none">issue I don't know.I like Cliff's method of having a set volume flowing in<br clear="none">(as per<br clear="none"> DW) & O2 addition generatedby O2<br clear="none"> measurements opening an O2 solenoid valve via a PLC. This is similar to<br clear="none">arebreather & James Cameron's system on the Deepsea Challenger.Don't get<br clear="none">me going on the coffee issue. I buy green beans & roast them. Would<br clear="none">growthem if we had the climate. My side of Auckland had power. Hugh lives<br clear="none">on the Dark side.Alan<br clear="none"> <br clear="none"> <br clear="none"> From: hank pronk via<br clear="none"> Personal_Submersibles<br clear="none"> <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none"> <br clear="none"> To:<br clear="none"> <a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a><br clear="none"> Sent: Tuesday, October<br clear="none"> 7, 2014 10:07 AM<br clear="none"> Subject:<br clear="none"> [PSUBS-MAILIST] bellows add<br clear="none"> <br clear="none"> <br clear="none"> I have been pondering the idea of a bellows add system for Gamma. I am<br clear="none">not sure how the DW deals with pressure change due to temperature change. <br clear="none">When I am diving Gam!</pre><pre> ma the</pre><pre>temperature swing is huge causing a big<br clear="none">negative pressure inside. A bellows add system would be dumping O2 in like<br clear="none">mad. Does the DW have an automatic O2 over ride or an automatic air<br clear="none">release to compensate. Does the pilot manually add air to avoid O2 build<br clear="none">up.<br clear="none"> When I surface after a dive without the scrubber or O2 feeding in, I have<br clear="none">to open my hatch vent valve for what seems like forever to equalize the sub<br clear="none">to open the hatch. It is getting better with the air temps dropping. I<br clear="none">can't wait to go for a dive when it is snowing. <br clear="none"> Hank</pre><pre style="text-align:center;"></pre><hr align="center" size="2" width="100%"><pre><br clear="none"> Personal_Submersibles mailing list<br clear="none"> <a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br clear="none"> <a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> <br clear="none"> -----Inline Attachment Follows-----<br clear="none"> </pre><pre style="text-align:center;"></pre><hr align="center" size="2" width="100%"><pre><br clear="none"> Personal_Submersibles mailing list<br clear="none"><br clear="none"></pre><pre style="margin-bottom:12.0pt;"><a 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