[PSUBS-MAILIST] O-rings

[Dan H.]

John,
That makes a lot more sense.  ;-)

The cross section that's called for should work well.  As I said in the earlier E-mail, it's pretty important to have the mating surfaces true to each other.  Weld first then machine.  That will keep all surfaces true and give you the proper compression of the O-ring all the way around the hatch.

Dan H.

  ----- Original Message ----- 
  From: subvet596 at optonline.net 
  To: Personal Submersibles General Discussion 
  Sent: Thursday, September 19, 2013 7:48 AM
  Subject: Re: [PSUBS-MAILIST] O-rings


  Hi Dan:

  Sorry for the confusion, a run on sentence will do that. I was asking about the size/cross-section of the O-ring. The 316 stainless steel ring would be welded to the dish lid in which the O-ring would be mounted using a machined dove-tail grove,   

  Thanks for the input.

  John K.


  ----- Original Message -----
  From: "Dan H." 
  Date: Wednesday, September 18, 2013 7:07 pm
  Subject: Re: [PSUBS-MAILIST] O-rings
  To: Personal Submersibles General Discussion 

  > John,
  > 
  > Are you sure you really want an O-ring with a one inch cross 
  > section??????????You'd need to machine a groove just under an 
  > inch deep and an inch in across to accept it. If your hatch 
  > cover is what the print calls for, it's not think enough for a 
  > groove of that size. 
  > 
  > The .275 cross section is plenty. The two mating surfaces being 
  > flat and mating with no gap is much more important then the O-
  > ring cross section. 
  > 
  > You should be fine with the O-ring called for. 
  > 
  > Dan H.
  > ----- Original Message ----- 
  > From: subvet596 at optonline.net 
  > To: PSUBS, Inc. 
  > Sent: Wednesday, September 18, 2013 3:35 PM
  > Subject: [PSUBS-MAILIST] O-rings
  > 
  > 
  > Hi All:
  > 
  > I need O-rings for the entry hatches which are 24" id. 26" od. 
  > he question I have is, what is the best cross section size to 
  > use The parker site has the E1157 @ .275 it seemed a little 
  > small to me. I have not yet machined the dove -tail grove yet. 
  > Also are there any specs. available for setting up a 3 dog 
  > mechanism, able to open from inside or out? 
  > 
  > Looking forward to the convention.
  > 
  > 
  > John K.
  > (203) 414-1000
  > 
  > 
  > 
  > -----------------------------------------------------------------
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  > 
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  > 


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