[TheForge] Ice rink

[Paul Sperbeck]

The parts are available from
http://www.sealseat.com/pdf/AIRCO-CONCOA.pdf
I haven't purchased from them in a while, and I believe that they were 
purchased by the Lincoln welder group. I buy from them through my 
business. If the problem is pressure creep and not leakage you can often 
add 10 years to the regulator by reversing the high pressure seal. See 
the parts diagram:
http://www.sealseat.com/pdf/AIRCO-CONCOA.pdf  (page 40 item 13)

The CGA nipples are available from:
http://www.bakersgas.com/western-enterprises-cga-fittings.html
http://www.bettymills.com/shop/product/find?keywords=western+brass
http://www.weldfabulous.com/casearch.aspx?SearchTerm=cga
among others. If you get a tank that will not seal with a new nipple, it 
should be returned to the supplier.

The use of teflon tape is greatly overblown. Properly cleaned and formed 
threads require VERY little sealant. It is more a lubricant than sealant 
anywhay. If you do use Teflon do not apply it to the leading (end) threads
see:
http://www.buyfittingsonline.com/greenfdtape.aspx ( i know I said don't 
use Teflon, this is ok used intelligently)
while this is expensive, it is what the professionals use. I have used 
this for medical gas installations for years:
http://www.fluoramics.com/formula8.shtml


paul
WB9HCO
-- 
Try to notice the thing that happened just before the thing
you didn't want to have happen happened!

Resistance Is Not Futile!
It's voltage divided by current.

No trees were killed in the generation of this message,
  but a tremendous number of electrons were terribly inconvenienced





On 11/17/2012 02:41 PM, Peter Fels & Phoebe Palmer wrote:
> Hi Paul:
> I favor those old Airco 2 stage regs too.
> Can you recommend a source for Regulator rebuild kits?
> I've been unable to get them locally for years  because of liability paranoia.
> While i generally agree about applying sealant to high pressure nipples, (especially oxygen fittings!!!)..
> I have , very carefully, had to use heavy teflon tape  on high pressure nipples to get a seal when the valve is beat up badly. Bad practice for sure. My gas supplier is an hour and 1/2 away and their maintenance department seems to be out to lunch.
> One has to be very careful that no teflon tape fragments get in the regulator intake and the battered seat and nipple is free of teflon when the bottle is empty. Never use any paste or liquid sealant that might flash under HP oxy!
> I see that newer propane nipples have inset "O"rings for seals. Would the same thing work for oxy with it's higher pressure demands?
>
> On Nov 17, 2012, at 9:19 AM, Paul Sperbeck wrote:
>
> If this happens with more than one tank, you need to repair the
> regulator. A damaged surface on the nipple can cause this, Inlet nipples
> are available. If that is not leaking you may have an internal problem.
> DO NOT APPLY TEFLON TAPE OR ANY SEALANT TO THE NIPPLE SURFACE OR THE
> NUT. If you are at all uncomfortable with the pressures involved I
> cannot recommend that you rebuild the regulator yourself.
>
> Repair parts typically will be around $50 wholesale to rebuild the
> regulator, expect to pay between $75 to $100 retail for the parts and
> possibly another $75 to do the rebuild.
>
> It may be cheaper just to replace the regulator. You might be able to
> purchase the regulator and re-use your flow meter depending on
> configuration.
>
> My favorite regulators are older Airco 2 stage units. They have been
> easy to obtain parts for, and have proved to be very reliable after the
> rebuild. I typically pay about $10 to $25 used at swap meets for
> regulators in need of a rebuild.
>
> paul
> WB9HCO