[PSUBS-MAILIST] cue ball arm

[hank pronk via Personal_Submersibles]

Hugh,
Now that is interesting!  Just so you know, the original cue ball sits on a ss shaped seat that matches the ball perfectly.  The seal is a regular 1/8 in dia o-ring mounted at the equator of the cue ball.
Hank--------------------------------------------
On Fri, 11/28/14, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] cue ball arm
 To: "'Personal Submersibles General Discussion'" <personal_submersibles at psubs.org>
 Received: Friday, November 28, 2014, 3:27 PM
 
 Hank, A metal ball is
 fine.  Brass is likely to corrode faster than 316 SS
 if it is not looked after. The harder the
 better of course but if it is kept
 greased
 then you won't have a problem.  Forget the seal having
 to be curved
 for the ball.  We use 45
 degree seats at 6000 psi.  There is less torque
 required on a 45 degree seat than a fully
 shaped one and the sealing is
 better.  We
 allow about 3 to 4 thou of crush from finger tight to
 fully
 torqued bolts. Because you are only
 doing low pressure you can get more
 angle
 with the seat contact to give you a greater movement. As I
 said before
 the secret is in the grease for
 ease.  Do you have an oxygen grease?  White
 stuff.  Will reduce the friction by 60%. 
 Regards,  Hugh     
 
 
 -----Original Message-----
 From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
 On Behalf Of hank pronk via
 Personal_Submersibles
 Sent: Saturday, 29
 November 2014 8:59 a.m.
 To: Personal
 Submersibles General Discussion
 Subject: Re:
 [PSUBS-MAILIST] cue ball arm
 
 
 Hi Hugh,
 I
 don't have the original drawings yet, but Vance has them
 and is sending
 them to me.
 I
 am going to experiment with a brass ball to replace the cue
 ball.  With
 the modified ball valve I can
 use a metal ball now.  Any thoughts on that.
 Hank--------------------------------------------
 On Fri, 11/28/14, Hugh Fulton via
 Personal_Submersibles
 <personal_submersibles at psubs.org>
 wrote:
 
  Subject: Re:
 [PSUBS-MAILIST] cue ball arm
  To:
 "'Personal Submersibles General
 Discussion'"
 <personal_submersibles at psubs.org>
  Received: Friday, November 28, 2014, 2:46
 PM
  
  Hi Hank,
  Do you or anyone else, have a cross section
 of  the cue-ball, glands, and
 arm 
 mechanism  anywhere?
  I would like to have
 a look at the
  seal side as well.  We make
 ball valves  and  have done a lot of work on
 different designs of seals. 
 
 Might be able to come up with one that is  easier to
 move.  We use an
 oxygen  grease  which is
 magic for reducing friction. Goes under the name
 of  "slippery pooze" here in the 
 workshop.
  Regards, Hugh.
 
 
  
  -----Original
 Message-----
  From: Personal_Submersibles
 [mailto:personal_submersibles-bounces at psubs.org]
  On Behalf Of hank pronk via
 
 Personal_Submersibles
  Sent: Saturday, 29
  November 2014 5:42 a.m.
  To:
 personal_submersibles at psubs.org
  Subject: [PSUBS-MAILIST] cue ball arm
  
  Hi Alan,
 
 I
  just added a picture of the cue ball arm,
 ball assembly,  installed on
 Gamma.  You
 can see the range  of motion and how it mounts to the
 sub.
  Hank
 
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