[PSUBS-MAILIST] Penetrator Air Void Question/Concern

[Steve McQueen via Personal_Submersibles]

Alan, yes I think you understand my application.  Thanks for the feedback. I don’t think I will worry much about this.  Sometimes things are easier when you are only dealing with K-250 type depths : )

 

Steve

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
Sent: Tuesday, January 31, 2017 4:51 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] Penetrator Air Void Question/Concern

 

Steve,

if I am reading it right it doesn't seem a problem.

This must be what Emile & Carsten do. They have a blue globe

outside & inside, & the cable between would have to travel through

a void. The inner cable gland would be a back up for any leaks, & also

stop the cable extruding in to the hull.

I am using them, & I have always been wary of the cross sectional make up

of the wires; ie. if you have two wires in the cable can the cable sheath crush

in an oblong shape & let water through the cable gland!

Alan

 

  _____  

From: Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
To: personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org>  
Sent: Wednesday, February 1, 2017 3:51 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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