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Hi all,

(This I had partially sent to Scott and just found some older 
message dealing with that subject.)

"I'd go for the MK 20 UL that can blow up together with your tank 
when you open the valve. If you happen to have a chip of aluminum 
(the technician scratched it with a tool) in the gas path, that one 
would make for a good spark and loves to react with the O2 content. 
Happens with all light metals. 
Wasn't the most expensive, but the most dangerous I've ever bought."

I had sent the following to that dealer (which covers the same 
problem):

IMPORTANT NOTICE (MARCH 1999)
DAN Announces Oxygen Regulator Recall 

DAN announces that Allied Healthcare Products, Inc. is recalling 
all oxygen regulators sold under the Life Support Products (LSP) 
brand. This recall, first announced on Feb. 4 by Allied, is to 
replace aluminum components in the unit's high-pressure 
chamber with brass components. This action is being taken in response 
to reports of fires and explosions, the exact causes of which remain 
unknown. 

Over the past five years the Food and Drug Administration has 
received 16 reports of aluminum regulators used with oxygen cylinders 
burning or exploding. These incident caused severe burns to 11 
healthcare workers and patients. 

DAN has sold two regulators that are affected by the recall. The two 
regulators (pictured) are the LSP 270-020 and the LSP 280-020. These 
regulators were sold in the DAN Standard, Dual, Mini, Charter and 
Training Unit oxygen systems from 1985-1997.

This recall does not affect the DAN Rescue Pak, Rescue Pak Plus and 
the regulators that are sold with those systems, the B & F Regulator 
(Part # 84025G) and the Allied Spectrum Regulator (Part # 
32-29-5551).

This, in conjunction with present recall efforts, will result in the 
replacement of all-aluminum high-pressure parts with brass parts. 
This interim measure will enable the regulators to be used during the 
period required to manufacture non-aluminum regulators. 

This information has been provided to the FDA. It is Allied's 
understanding that the FDA is recommending the elimination of all 
aluminum in oxygen regulators. Users can reduce the risk of oxygen 
fire and explosion by keeping in mind the following precautions:

The oxygen cylinder, cylinder valve and regulator should be free of 
all contaminants. 
The cylinder valve should be opened slowly whenever the unit is used 
in order to minimize heat of rapid compression in the regulator. 
Users who refill their own oxygen cylinders should take extra care to 
avoid the introduction of contaminants during the filling process. 
For more details about this recall, visit Allied's Internet site at   

http://www.alliedhpi.com/corporate/mediaCenter/9902oxygen.htm.

<snip>

The dealer was full of denial. I understand that some people have to 
live from what they sell, and heck, the reg is expensive enough to 
make for a good deal.

Same dealer had sold me boundary wings before I had a clue.
All went to ebay.

Claudia
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