[PSUBS-MAILIST] Original MBT vent?

[hank pronk via Personal_Submersibles]

 I like the simplicity of this vent valve set up. It could be built with bolt together flanges allowing for maintenance.  Stop valves should not be needed because the valve is so close to the hull, and really how much different is it to having a valve with a nipple into a penetration.   I can see it not passing but,,,,Hank

    On Wednesday, June 9, 2021, 02:20:43 PM MDT, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 It's straight off a World War II sub--I wonder if Lloyds made him do that.Vance


-----Original Message-----
From: Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Wed, Jun 9, 2021 3:59 pm
Subject: [PSUBS-MAILIST] Original MBT vent?

I found this K-600 drawing (see attached image) of MBT vent valve dated March 23, 1976.  Rejected I suspect because it brought a water source into the cabin and offered multiple leak points.  The date listed on the drawing is interesting because even going back to the MK-III vessel which predates VAST, I'm seeing the traditional MBT vent valve outside the conning tower with just the valve stem protruding inside.  Was this something he considered an improvement that was rejected by the Norwegians?  Did it vent faster?  George, you left us with many questions.
Jon_______________________________________________
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