Re: [PSUBS-MAILIST] High-Pressure Cable Gland

["Alan James" <alanjames@xtra.co.nz>]

Hi Jens,
Have filed this one thanks.
Interesting that the angle was critical.
Am wondering if it would work filling with epoxy?
I potted wires comming out the back of my linear actuator, inside a 1 & 1/2 
inch tube with either vynil ester or
polyester resin then filled the linear actuator with WD40. I was amazed that 
the WD40 just leaked out.
Re potting with epoxy fixed this.
Alan

----- Original Message ----- 
From: "Jens Laland" <laland@artematrix.org>
To: <personal_submersibles@psubs.org>
Sent: Saturday, February 27, 2010 1:16 AM
Subject: [PSUBS-MAILIST] High-Pressure Cable Gland


> Re.: Insulated electrical leads into pressure vessels...
>
> "Several designs for insulated lead-ins have been tried, but that shown in
> Fig. 131 has given satisfactory service over several years, when working
> with various fluids, including carbon dioxide, ethylene, hydrogen,
> nitrogen, water and transformer oil. A double cone arrangement is used to
> enable the apparatus to be used at pressures above and below atmospheric.
> No leaks are observed for pressures up to 300 atm. and down to vacuum
> equivalent of at least 0.1 cm. of mercury and over a temperature range of
> 0-80° C. With cone angles, other than those shown, extrusion of the
> plastic occurred. Polystyrene was originally used as the insulating
> material but it fissures under varying pressures and leaks occur. Some
> batches of Perspex were found much more satisfactory. Under varying
> pressure this material expands but does not crack."  [From the book
> LABORATORY AND WORKSHOP NOTES 1953-1955]
>
> Click link below to view the uploaded sketch, etc.
>
> ftp://ftp.artematrix.org/through-hull/parbrook1953.jpg
>
> Best regards,
> Jens Laland
>
>
>
>
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