[PSUBS-MAILIST] Light housing gaskets

[Alan via Personal_Submersibles]

Hi Hugh,
yes am using heat paste under the LED. Should I be using it between
the base & middle housing on assembly?
The drawing is not quite right & I am taking the fins up as far as I can.
 The light has kept cool when testing in the sink.
Good point about the o-ring height. I was hoping the top gasket might
seal if it was compressed to half during assembly. Maybe if I syringed
vasaline in to the gap above the o-ring in assembly it would help.
Alan 

Sent from my iPad

> On 19/04/2017, at 2:45 PM, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan I suggest you reduce the height of the main body and add it to the bottom piece with more grooves.
> As you will no doubt be anodising you will not get as good transfer of heat through the joint.
> Also if possible move the face O’ring to the outside more as water gets between the faces and corrodes.
> Are you using heat transfer paste?
> Hugh
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan James via Personal_Submersibles
> Sent: Wednesday, 19 April 2017 2:28 PM
> To: Personal Submersibles General Discussion
> Subject: [PSUBS-MAILIST] Light housing gaskets
>  
> Cliff & Alec,
> just ordering 20 tempered borosilicate lenses at $2-50 each including postage!
> They will go in the pressure chamber, so I'll know whether I got good value.
> Just wondering what you guys used as gaskets under the lens.
> I did have an o-ring under the acrylic lens but are putting a gasket under the glass.
> I have an o-ring in the bore of the lens housing but would like my gasket to be a
> secondary seal as well as seat.
> Alec, with your experience of lenses breaking, I am looking at a suitable thickness
> of neoprene or similar for the top gasket that I can compress to half it's thickness
> when bolting the housing together. This will give me a bit of machining tolerance.
> see attachment
> Alan
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