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Hello David, > I wanted to find out what type of tanks are the most prevalent in technical > diving Diameters/ volume : 140/ 171/204 mm for 7/ 10-12long/15-18-20 l steel tanks Aluminium mmay vary a bit, the 7 l ones are slightly bigger. The distance between tank axis and sealing surface on a DIN air valve normally is 15 mm. So if tanks are connected with a face-seal manifold by the DIN openings, the tank bands must hold the tanks in parallel and at the right distance, so that no tension or offset angle may occur at the sealing. The barrel-type manifold are better, because they provide means to adjust for an parallel axis offset in the tank bands, but care must be taken not to screw the left/right adjusting threads resulting in an awkwardly tilt angle. And they are more shatterproof and impactresistant, because impacts do not affect the sealing radial o-rings. However you need a different setr of valves. With ordinary DIN valves in the manifold, the precision in the distance / angle settings is within the tank bands. Something where there is still room for improvement with many designs. Is that what you have asked for ? Matthias (wreck, caving etc..). Also, what type of manifold do you use? > Lastly, are there different types of maniflolds and bands for different > capcity tanks? > > thanks in advance. > > Layne Hedrick > Nautical Archaeologist > NOAA Science Diver > AAUS Science Diver > NAUI Instructor > SSI Instructor > TDI Instructor > DAN O2 Instructor > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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