[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

re: My last word on needle valves..

Dave Gomberg Wrote:

To: Aquatic-Plants at actwin_com 
Subject: My last word on needle valves.... 
From: Dave Gomberg <gomberg at wcf_com> 
Date: Wed, 17 Jan 2001 13:44:35 -0800 



This is a good news/bad news story.

First I should say that as the seller of over 250 CO2 systems, it is my 
guess that my system is the most widely used in this country.  And I am 
concerned that my customers have a positive experience with it.  This does 
require paying attention to end of tank (see 
http://www.wcf.com/co2iron/faq.html#dump  ).

I searched and searched for a proper needle valve that could be used in 
connection with my high-pressure system for those who wanted a more 
belt-and-suspenders approach to end-of-tank management.   And the good news:

I found a terrific valve, the Fabco NV-55 which costs between $15 and 
$20.  You buy one from your local Fabco distributor (see 
http://www.fabco-air.com/distributors.html    ).  It seems to be quite well 
built and to allow you to regulate the flow pretty accurately, even when 
the input pressure to the valve is 30 psi.

Now the bad news:

I left the valve in place overnight.   This AM, the hose connecting the 
regulator to the Fabco valve had blown off the regulator and dumped the 
whole CO2 cylinder.   The bad news of that is that I needed to go get a 
refill, and I may have to rebuild my regulator.  The good news is that no 
fish were killed (because the dump occurred into the room, not into the 
airspace over the tank).

So all in all, I have to say the risks of a needle valve outweigh the 
benefits FOR ME.   And I will not use one.   But you may come to a 
different conclusion.   If you do and if you are a user of my system, send 
an SASE with $.55 in stamps on it to me and I will send you free the 
adaptors to connect your NV-55 to the green hose that comes in my system.

Sorry the news isn't better.     Dave

I reply:
This is_not_an issue when the needle valve is threaded to the regulator. I 
personally would never trust and never use any type of hose in between a 
needle valve and regulator except maybe metal. My three regulators have 
needle valves threaded into them and never a problem as you describe. One 
less chance for disaster.