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Last Tuesday and Monday Poseidon Sweden introduced the new Xtreme regs in Germany. While the outer appearance and some technical details can be viewed at http://www.poseidon.se/, some brief personal notes about which is not so obvious. The new scd stage internals are identical with the old Jetstream ( pilot valve) , but the inhale membrane cover is totally new designed and can be taken of with just one twist, and the inhale membrane thus be cleaned. It is housed now pointing backwards to the diver's chin, so not prone to open demand in a current. The exhale diaphragm is now a separate one, lying under a front cover, easy to access. Strange look though. Internal dead space has been minimized for better performance. Hoses are the same as old Jetstream. incorporating the opvalve. The new first stage look very sturdy, and do not deny their ancestor, the cyklon 300. Indeed they look so simply built that one demands why they haven't been built like that forever. Except for springs, there are 4 moving parts, hp seat, ballbearing ball, steering needle, upper diaphragm. Nothing to be adjusted, not even IP, which is fixed at 8,5 bar by a cap holding the spring. No adjustment screws here. The ball is said to revolve while in action, so it would be self cleaning. The needles is kept in a replacable broce guide shaft. The hp seat floats within bottle pressure and a strong spring. Some variants are available, geometrically ( straight in line, and 90 degrees bent) and with respect to different gases ( oxygen, nitrox, as opposed to air/trimix with low oxygen content( different O-rings) There is one hp outlet, 2-3 IP ones, according to model. This qualifies the regs as made for doubletank diving. Hope this is sufficient, otherwise feel free to ask. Matthias -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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