Re: [PSUBS-MAILIST] acrylic sphere/lithium Hydroxide

[Coalbunny <coalbunny@vcn.com>]

I have dealt with Reynolds Polymer, and they won't do anything without
an engineer involved.
Carl


Ppjanca@aol.com wrote:
> 
> The ultimate US source for acrylic hyperhemispheres is Reynolds Polymer
> Technologies, Inc. of Grand Junction Colorado (<A
> HREF="http://www.reynoldspolymer.com">www.reynoldspolymer.com</A>), ask for
> Kyle. In the UK you have the choice of Stanley Plastics or Blanson. All three
> have supplied me with PVHO acrylics in the past and with one single (UK)
> exception we have been most pleased with price and delivery. One big question
> to ask them is "what size tooling do you already have, and.... is it
> proprietary?"  Then design around their tooling inventory. I have over $250K
> invested in acrylic tooling and you had better not expect to purchase acrylic
> off of my tooling without some compensation. In many cases a few ice cold
> Coronas will be sufficient compensation if you are a serious builder and
> safety oriented.
> A 66" hyperhemisphere with 5" nominal wall thickness should cost in the
> region of $160K.
> AMRON International (<A HREF="http://www.amronintl.com">www.amronintl.com</A>
> ) sell  "off the shelf" scrubbers but they are relatively easy to make using
> a dual voltage vacuum cleaner motor (BUFFALO is one brand that comes to mind)
> so that you can run it at normal speed on 12/24 vdc and then boost the
> scrubbing action in stressful periods by switching to 120 vdc. I always
> prefer transparent (acrylic again NOT Lexan) canisters with "milk filters"
> upstream and downstream (top and bottom of the acrylic canister) to trap
> fines. The only grade used in commercial boats is "408 white to violet." By
> using the transparent canister you can see the color change take place.  It
> is probably unnecessary to say this but you want the scrubber intake to be as
> low as possible in the command compartment because co2 is a heavy gas. The
> most popular discussion in making scrubbers is "suck or blow." We always
> prefer to draw the command sphere/compartment atmosphere through the scrubber
> bed. My personal feeling is that I am tuned to hear the scrubber slow down
> and immediately suspect (1) low voltage (2) scrubber bed loading (dust or
> moisture).  Hopefully all of you know how to make a lung powered scrubber and
> have plans to do so!
> Again, suck or blow is the big issue. Here the issue seems to be more
> personal pilot opinion.  In diving technology (wet type) we know that
> exhalation resistance can often be more distressing than inhalation
> resistance. For my money I will always scrub on the inhalation cycle!
> We have used all of the popular co2 absorbents but I personally prefer
> Sofnolime. You can purchase directly from  <A HREF="http://www.oclugo.com">
> www.oclugo.com</A> they presently have smaller containers in stock and are
> expecting a large delivery of the 44# "kegs" in a mid-October.
> Another great source for small quantities of absorbent is Advanced Diver
> magazine
> <A HREF="http://www.advanceddivermagazine.com">www.advanceddivermagazine.com
> </A>
> Sorry for the long winded answers.
> Best Regards:
> Phillip Janca
> Chairman
> HyperTec, Inc.
> World Leader in Hyperbaric Technologies
> 800-218-3588
> 940-564-5600
> 940-564-5609 Fax
> http://www.hypertec.ws

-- 
You're going to find that many of the truths we cling to depend greatly
on our own point of view."
-Obi-Wan Kenobi, ROTJ