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

[vbra676539 at aol.com]

I roughed out a homemade top hat valve, pneumatically operated, that has worked for decades on Hyco subs. They aren't on the computer, but I could mail you a copy if I can find one. There are some modern variants with better sealing capabilities used in the tourist sub industry, as well. Considering the costs, you'd probably want to be thinking about building them yourself.
Vance



-----Original Message-----
From: Joe Perkel <josephperkel at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Sat, Dec 7, 2013 10:28 pm
Subject: Re: [PSUBS-MAILIST] Flush Mount Valves in MBT's



I should add that my roof comment reflects my circa 1925 flat roof!
 
Joe
 
 
 
 
 
  On Saturday, December 7, 2013 10:20 PM, Joe Perkel <josephperkel at yahoo.com> wrote:
  
  




Hi Vance,

Flush mount meaning that the valve body itself is within thetank and flush with the upper surface. Since the body of the valve protrudesdown into the tank, I’m wondering about trapped air like rainwater on a house collectingin low spots on the roof and not going down the gutter. 
The question was prompted by my virtual but acurate construction of the as drawn K-350 in order to better understand it's workings prior to any real attempt at redesign. Im currently on the tubing diagram, but things like this prompt me to think ahead a bit.

I really really like the up high and straddled MBT set ups on the big guys like Alvin and JAMSTEC’s Shinkai with remote vents in each of the two tanks. I would want to emulate that very set up.

Joe

 
 
 
 
 
  On Saturday, December 7, 2013 9:54 PM, "vbra676539 at aol.com" <vbra676539 at aol.com> wrote:
  
  

Flush mount? Not sure what you're thinking of here. Pneumatic valve suggests a valve operated pneumatically. That's relatively easy in the home shop at whatever diameter you prefer. Hyco used them on everything, as do all the tourist subs out there. Otherwise, you'd mount a valve on the tank's high point and operate it with a reach rod from inside, like the Perry boats. I'm with you about the tubing run. Bad design. You'd want to reduce that to a minimum or none at all.
Vance



-----Original Message-----
From: Joe Perkel <josephperkel at yahoo.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Sat, Dec 7, 2013 8:09 pm
Subject: [PSUBS-MAILIST] Flush Mount Valves in MBT's




I need a little help understanding the installation ofremotely operated pneumatic valves in soft tanks. I’ve been looking at variousproducts on the Net, and from what I see, there doesn’t seem to be an off theshelf 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 eliminatesthe exterior tubing routed to the conning tower.
Am I missing a valve type or installation that wouldaccomplish this?
Thanks
Joe




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