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I will tell you what I know about the Nitrox Stick that I have. Starting at the K bottle of O2, there is a regulator which is used to control the liters per minute and adjust the mix percent. There is a flow restricter built in that in theory, limits the ammount of O2 flowing to the Stick. This is to prevent blends abouve 40% from entering the compressor. The metered O2 then flows up a section of tubing to the Nitrox Stick, which is mounted outside the building. The O2 is then blended inside the Nitrox Stick and flows to the compressor through another(larger diam.) tube/pipe to the compressor inlet. FYI, we are running a IR 4R15 with Anderol 750 synthetic. The blended nitrox then flows through our filter system (no, it's not OCA) to the fill whip. I have not taken the Nitrox Stick apart to see what is inside it, but it looks like a two foot section of PVC with the top third being about 2 inches in outside diam. larger than the lower third. The pure O2 inlet is on the very top and the outlet to the compressor is on the bottom. It is claimed that a vortex is created inside the unit and this blends the O2 with air. It is claimed that the Stick does a very efficient job of blending and we should not get any trace O2 traveling down the sides of the intake plumbing. Flamers please note: I do not own the dive store, I did not spec the unit. Regards, Brett Taylor Olympia, WA. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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