I don't know for sure, but my guess would be inflatable PFDs have the same sort of "over-pressure relief valve" as scuba diving Bouyancy Compensators do. It's a plastic disc held down by a spring of a rated strength. When the pressure inside the vest exceeds the determined amount (which should be well below what the fabric and seams can withstand), the pressure pushes the disc open, bleeding off air until the pressure lowers to the point the spring can push the disc shut again. Simple, and fairly foolproof. Philip Torrens N49°16' W123°06' >From: Elaine Harmon <eharmon_at_cs.miami.edu> >To: Mel Lammers <mslammers_at_earthlink.net> >CC: PaddleWise_at_lists.intelenet.net >Subject: Re: [Paddlewise] Inflatable PFD's >Date: Mon, 30 Aug 1999 17:14:57 -0400 (EDT) > >On Mon, 30 Aug 1999, Mel Lammers wrote: > > > I wonder what happens if you have it mouth inflated and then get tossed >and > > forgetting, pull the CO2 inflator tab. > > > > Does it have a safety valve or do you hear a loud bang? > > I asked the owner, what if you pull the tab when it's partly inflated and >you want to top it up in a hurry, and she didn't know. Maybe someone on >the list does? e > > >Elaine Harmon - eilidh_at_dc.seflin.org - eharmon_at_cs.miami.edu *************************************************************************** PaddleWise Paddling Mailing List Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************
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