[PSUBS-MAILIST] Penetrator Air Void Question/Concern

[Alan James via Personal_Submersibles]

Steve,if I am reading it right it doesn't seem a problem.This must be what Emile & Carsten do. They have a blue globeoutside & inside, & the cable between would have to travel througha void. The inner cable gland would be a back up for any leaks, & alsostop the cable extruding in to the hull.I am using them, & I have always been wary of the cross sectional make upof the wires; ie. if you have two wires in the cable can the cable sheath crushin an oblong shape & let water through the cable gland!Alan

      From: Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org>
 To: 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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