[PSUBS-MAILIST] Penetrator Air Void Question/Concern

[hank pronk via Personal_Submersibles]

Rick,I would not dive without an aircraft  altimeter or gauge that does the same job.  Most guys are going to sky diving altimeters and they have a new face sticker made.  Gamma came with an altimeter so that is what I am used to.  When you dive there are pressure changes from temperature changes.  That shows up right away on an altimeter, you then just give a shot of air inside to  add some pressure.  Also you can end up with an over pressure that shows up right away on an altimeter.  That is important if the over pressure is significant.  You can vent it off before you hit the surface or you may have an over pressure valve.  The altimeter is not just for life support.  Hank 

    On Tuesday, January 31, 2017 12:46 PM, Rick Patton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Would love to hear from anyone who is presently using LED's for their outside lighting. I am getting ready to fab the housings for my outer lights and am tempted to use a bulb and reflector that is used in a divers flashlight that has a reflector OD of say 3" to 4",  but have heard a lot about LED's in the group. Also like to hear what people are using for an altimeter for monotering the O2 levels. I already have a gas monotering device that checks for 02 and Co2 so would I even need an altimeter?Thanks
Rick
On Tue, Jan 31, 2017 at 6:37 AM, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

If there is room for a 1/8" pipe nipple inboard, you could put a small pressure gauge on the panel somewhere. If you get an increase, it would tell you the outer seal leaked. That's the way we did it for the oil-filled space between double shaft seals at Perry. Don't see why it wouldn't work for this application, as well.Vance


-----Original Message-----
From: Steve McQueen via Personal_Submersibles <personal_submersibles at psubs. org>
To: personal_submersibles <personal_submersibles at psubs. org>
Sent: Tue, Jan 31, 2017 9:51 am
Subject: [PSUBS-MAILIST] Penetrator Air Void Question/Concern

All, I am running a multi conductor cable (11-12mm OD) for my 12V stern thruster thru an existing 1/2" pipe nipple in the aft head of my K-250.

I am using a Blueglobe gland fitting (BG 220 VA, rated @ 1,160 psig) on the outboard pressure side of the nipple and a Conax gland (PG5-500-A-N,rated @ 800 psig) for the gland fitting inboard.

I was originally only going to have interior Conax gland and let the pipe free flood. Then I decided I wanted to have redundancy and keep the pipe interior dry to help prevent corrosion (it is old school (not SS)). 

My question: Is the air void that will exist between the 2 gland fittings a concern? Think empty pipe with both ends capped. I'm thinking not...


Thanks,
Steve
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