RE: [PSUBS-MAILIST] Soft ballast venting valve

["Brian Cox" <ojaivalleybeefarm@dslextreme.com>]

Hi Frank,
            I went to the boat yard today and found some very nice bronze ball valves.  The body is bronze and the ball is stainless with some type of plastic insert around the ball, probably delron or something similar.  I think rather than some exotic butterfly valve I will settle for this.  They are readily available and a lot cheaper.  And then I'll go with the stainless Swagelock components for HP air.    I wonder if there would be any problem with going from a stainless flange and then using a stainless nipple to a bronze ball valve.

Brian

-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of irox
Sent: Monday, January 05, 2009 3:48 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Soft ballast venting valve



Hi Frank,

if I'm reading this correctly, you can only blow your main tanks
once while at operating depth.  Have you considered increasing
the amount of compressed air you carry so you have more chances
of surfacing?  I think ABS recommends enough air to blow the main
tanks 6 times at operating depth (somebody correct me if I'm wrong,
I don't have the ABS book in front of me).

Thanks for the pictures, this sub looks really unique!  I still
want to come and visit you soon!

Cheers,
  Ian.


-----Original Message-----
>From: ShellyDalg@aol.com
>Sent: Jan 5, 2009 11:48 AM
>To: personal_submersibles@psubs.org
>Subject: Re: [PSUBS-MAILIST] Soft ballast venting valve
>
>Hi Dean. Good to hear from you again. Ya, it's the speed (or lack of) that  
>the bigger valves addresses. If the typical dive is fairly deep and you only  
>need to go down and up once or twice it's probably not an issue. But if you 
>want  to go up and down a lot like cruising shallow waters it may make it  
>easier/faster to have large valves. I should be able to blow my tanks dry 4  times 
>at the surface without using the reserve tanks. If I need to blow while  still 
>deep, maybe only once. Going to try to avoid that, but if you did have to  
>blow air in while deep, and then you started to "shoot" to the surface, a bigger  
>valve might come in handy to dump some expanding air and slow your ascent. 
>Frank  D.
>**************New year...new news.  Be the first to know what is making 
>headlines. (http://www.aol.com/?ncid=emlcntaolcom00000026)




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603-529-1100
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