The Planted Tank Forum - View Single Post - Metering(needle) valves selection for our CO2 pressurized system
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post #41 of (permalink) Old 07-11-2011, 03:35 AM Thread Starter
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Join Date: Feb 2009
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Originally Posted by btimmer92 View Post
good thought though, it would work if the pressure didn't build up between the two valves, because as we know, flow varies with pressure

Jaggedfury once had the same idea you did, except he was actually telling his customers that this could be done with his paintball neede valves..... :0
the problem is that the input psi is 800, too much, if for some reason the second valve stuck, the space between 1st and 2nd valve will be 800 psi, if this space is plastic air tube but not metal that can withstand 800 psi, it will burst.
so cut off the flow from second valve will cause trouble, and always turn off flow at 1st valve.
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