[PSUBS-MAILIST] Manipulator arm

Wed Jan 21 21:51:29 EST 2015

That is exactly what it is, and you can build a hard tank of any size and just add the airbag on to provide compensatory volume. You need to precharge the airbag, either by just expanding it or by spring loading it, such that you still have positive pressure over ambient at the highest fluid demand.  Also give consideration to vent cap locations - you want to be able to bleed air off over your tank and at any high points.

Sean

On January 21, 2015 4:37:07 PM MST, "swaters at waters-ks.com via Personal_Submersibles" <personal_submersibles at psubs.org> wrote:
>I reveiwed my pictures and Nuytco uses hydro-lek manipulator arms with
>a resevor that looks just like a air bag for semi trucks. I am pretty
>sure they are hydraulic.
>Thanks,
>Scott Waters
>
>
>Sent from my U.S. Cellular® Smartphone
>
>
>-------- Original message --------
>From: hank pronk via Personal_Submersibles
><personal_submersibles at psubs.org> 
>Date:01/21/2015  5:01 PM  (GMT-06:00) 
>To: Personal Submersibles General Discussion
><personal_submersibles at psubs.org> 
>Subject: Re: [PSUBS-MAILIST] Manipulator arm 
>
>
>Alan,
>When I had my tour of Nuytco, I saw the arms well actually a shelf full
>of them and the valves.  I assumed they were hydraulic, but maybe not. 
>It could work with sea water, but fresh water could be problematic with
>freezing.
>Hank--------------------------------------------
>On Wed, 1/21/15, Alan James via Personal_Submersibles
><personal_submersibles at psubs.org> wrote:
>
>Subject: Re: [PSUBS-MAILIST] Manipulator arm
>To: "Personal Submersibles General Discussion"
><personal_submersibles at psubs.org>
>Received: Wednesday, January 21, 2015, 2:50 PM
>
>Not sure,
>but don't the "Deep Workers" have
>a hydraulic
>system using sea water, with externalpump &
>valves.Does
>anyone know anything about this?Alan
>         From:
>"swaters at waters-ks.com via Personal_Submersibles"
><personal_submersibles at psubs.org>
>
>To: Personal
>Submersibles General Discussion
><personal_submersibles at psubs.org> 
>
>Sent:
>Thursday, January 22, 2015 4:58 AM
>  Subject: Re:
>[PSUBS-MAILIST] Manipulator arm
>  
>  
>My plan
>was to use O ring seal. I am using a comoensated
>system.Thanks,Scott
>Waters
>
>Sent from my U.S.
>Cellular® Smartphone
>
>-------- Original message
>--------
>From: hank pronk via
>Personal_Submersibles  
>Date:01/21/2015 
>9:41 AM  (GMT-06:00) 
>To: Personal
>Submersibles General Discussion  
>Subject:
>Re: [PSUBS-MAILIST] Manipulator arm 
>
>
>Scott,
>You
>need to decide on what type of hyd system you are going with
>before you dive into cylinders.  If you are going with a
>pressure compensated system, you can use cylinders with a
>wiper seals on the shafts.  If you not pressure
>compensating, then use cylinders with o-ring seals on the
>shafts.  I would use o-ring sealed shafts regardless.
>Hank--------------------------------------------
>On Wed, 1/21/15, swaters at waters-ks.com via
>Personal_Submersibles
><personal_submersibles at psubs.org> wrote:
>
>  Subject: Re: [PSUBS-MAILIST]
>Manipulator arm
>  To: "Personal
>Submersibles General Discussion"
><personal_submersibles at psubs.org>
>
>Received: Wednesday, January 21, 2015, 8:25 AM
>  
>  Gotcha.
>  I
>got about 8 different suppliers I have found so far with
>  SS cylinders. I think I'll order a few to
>play with. I
>  am also planning on using
>electric silionoids for
>  controlling the
>valves.Thanks,Scott
>  Waters
>
>
>  Sent
>  from my U.S.
>Cellular® Smartphone
>  
>
>-------- Original message --------
>  From:
>hank pronk via Personal_Submersibles  
>
>Date:01/21/2015  6:54 AM  (GMT-06:00) 
>
>To: Personal Submersibles General Discussion  
>  Subject: Re: [PSUBS-MAILIST] Manipulator arm
>
>  
>  
>
>Scott,
>  Gamma uses air cylinders with
>hydraulic fluid and
>  pump.  The hydraulic
>system is very standard except it
>  uses air
>cylinders in place of hydraulic cylinders.  
>
>Hank--------------------------------------------
>  On Tue, 1/20/15, swaters at waters-ks.com via
>  Personal_Submersibles
>
><personal_submersibles at psubs.org> wrote:
>  
>  Subject: Re:
>[PSUBS-MAILIST] Manipulator arm
>  To:
>"Personal Submersibles General Discussion"
>  <personal_submersibles at psubs.org>
>  Received: Tuesday, January 20, 2015, 10:27
>PM
>  
>  
>  Is Gamma all air cylinders? Do you just
>use
>  a air compressor? What happens to the
>air once it is in
>  the
> 
>cylinder and you want to lower the cylinder? Is it
>  recompressed or somehow expelled? I really
>don't know
>  crap about pnematics.
>Haha. Why do all the subs use
>  hydrolics
>and not air. For example
> 
>hydro-lek?Thanks,Scott
>  Waters
>  
>  Sent
> 
>from my U.S. Cellular® Smartphone
>  
>  -------- Original message --------
>  From: hank pronk via Personal_Submersibles 
>
>  Date:01/20/2015  9:06 PM  (GMT-06:00)
>
>  To: Personal Submersibles General
>Discussion  
>  Subject: Re:
>[PSUBS-MAILIST] Manipulator arm 
>  
>  
>  Scott,
>  Not sure why you want hydraulic cylinders. 
>You want
>  air cylinders, they are light
>weight and all
>  aluminum. 
>  If you use 2 in bore air cylinders you can
>run on a 500
>  psi
> 
>system.  Also air cylinders typically have 5/8 rods
>  and
>  that is the most
>important part.  The rod size is
>  what
>  the water pressure is pushing back against
>you
>  system. 
>  Air
>cylinders have a single o ring on the piston and are
>  cheap and easy to replace. If you want ss
>rods then just
>  replace the chrome rods
>when they wear out.  I made
>  my
>  own rods for Gamma, easy peezy.
> 
>Hank--------------------------------------------
>  On Tue, 1/20/15, swaters at waters-ks.com
>via
>  Personal_Submersibles
>  <personal_submersibles at psubs.org>
>wrote:
>  
>    Subject: Re:
>[PSUBS-MAILIST] Manipulator arm
>    To:
>"Personal Submersibles General
>
>Discussion"
> 
><personal_submersibles at psubs.org>
>   
>Received: Tuesday, January 20, 2015, 8:52 PM
>    
>    Hydrolic.
>    Also what size bore does yoursub have
>    Hank?Thanks,Scott Waters
>
>  
>    Sent
>    from my
>U.S. Cellular® Smartphone
>    
>    -------- Original message --------
>    From: hank pronk via
>Personal_Submersibles  
>   
>Date:01/20/2015  7:34 PM  (GMT-06:00) 
>   
>To: Personal Submersibles General Discussion  
>    Subject: Re: [PSUBS-MAILIST] Manipulator
>arm 
>    
>    
>    Are you using hydraulic cylinders or air
>cylinders.
>   
>Hank--------------------------------------------
>    On Tue, 1/20/15, swaters at waters-ks.com
>via
>    Personal_Submersibles
>    <personal_submersibles at psubs.org>
>wrote:
>    
>    Subject:
>[PSUBS-MAILIST] Manipulator arm
>    To:
>"psubs"
>   
><personal_submersibles at psubs.org>
> 
>  Received: Tuesday, January 20, 2015, 7:51 PM
>    
>    Does
>    anyone have a reccomendation on a source
>for
>  hydrolic
>   
>cylinders? Ofcourse there are tons online, just
>  wondering
>    if
>    someone has a particular place they like
>to get
>    them.Thanks,Scott Waters
>    
>    Sent
>    from my U.S. Cellular®
>    Smartphone
>   
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