[PSUBS-MAILIST] Flush Mount Valves in MBT's

[Alan]

Hi Joe,
One stainless low profile unit came close.
I liked the idea of a cheap off he shelf item with little modification needed.
In G.L. section 7 D 4.4 it states "where diving tanks have flooding holes without
means of closure, double shut off valves may be stipulated for the vent pipe."
I don't know what ABS says about this. 
Alan

Sent from my iPad

On 9/12/2013, at 9:13 AM, Joe Perkel <josephperkel at yahoo.com> wrote:

> 
> Hi Alan,
> 
> That's similar to a Kingston isn't it? That shape would assure complete venting, one would have to be assured of fail safe reliability in whatever was used. I would like a normally closed fail safe mode in whatever style best assures sealing.
> 
> Joe
> 
> 
> 
> Sent from Yahoo Mail for iPad
> 
> From: Alan <alanlindsayjames at yahoo.com>; 
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>; 
> Subject: Re: [PSUBS-MAILIST] Flush Mount Valves in MBT's 
> Sent: Sun, Dec 8, 2013 7:10:19 PM 
> 
> Hi Joe,
> While thinking about the ballast valve, it occurred to me that
> the drain pop up plugs found in modern bathrooms, are very
> similar to what we want.
> https://www.google.co.nz/search?client=safari&hl=en-gb&biw=768&bih=928&tbm=isch&sa=1&ei=47ukUvT-EsqhkwWt04DoAQ&q=drain+pop+up+waste&oq=drain+pop+up+waste&gs_l=img.3...46028.57398.0.58014.39.28.0.2.2.0.324.3866.8j5j4j5.22.0....0...1c.1.32.img..27.12.2132.cLok805IcCc
> Hope that link came out OK. It was an image search on DRAIN POP UP WASTE
> They would need to work upside down for our application, so they would be flush on the
> inside of the ballast tank (eliminating an air trap) but extend a bit above the ballast tank.
> Some models look like you could just stick an air line straight on to them, & with a spring 
> In them, they would work.
> There may be some model that is ideal.
> Alan
> Sent from my iPad
> 
> On 8/12/2013, at 2:09 PM, Joe Perkel <josephperkel at yahoo.com> wrote:
> 
>> I need a little help understanding the installation of remotely operated pneumatic valves in soft tanks. I’ve been looking at various products on the Net, and from what I see, there doesn’t seem to be an off the shelf remotely operated valve that would install flush and fully vent the tank. What I’m looking for is a flush mount and a clean installation which eliminates the exterior tubing routed to the conning tower.
>> Am I missing a valve type or installation that would accomplish this?
>> Thanks
>> Joewith 
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