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In a message dated 8/19/98 4:16:01 AM Eastern Daylight Time, f.sonnemans@we* equip.com writes: > You might ask why not ScubaPro, but I am not sure that their piston based > regulators are ideal. If silt can cause problems in the second stage, it > also can cause failure in the first stage (I assume, for piston types). > Personnaly I believe the membrame type is better for two reasons: > 1. less sensitive to floating particles, contamination and cold water. > 2. will not free flow in case of a high pressure valve failure. > > Still most cavers use Scubapro. Am I wrong here? and why? > > I need to purchase another reg. and want to avoid buying the wrong one. > > Thanks in advance for your comments > > Frank Hold on...a diaphraghm better then a piston...hmmm. Well, lets look at potential for failure...a BIG rubber disk that can crack, warp slip etc to let water into the working part of the 1st stage...not to mention miniscule little passages for air to flow... Compare that to a MK20, balanced piston. No major failure point, if an O-Ring wears out, you'll more then likely only get a IP creap, or a slight piss out the ambient holes around the piston...and you have time to fix em before they fail. They have a HUGE air flow capability compared to a diaphraghm, and will out flow them (diaphraghms) by at least 35-50 Cubic Feet Per Min... They have ports set up for DIR rigging, (try that with yor Abyss) and with a G250 second stage you can take it apart to clean it if silted out. If your worried about silting out your first stages, I'd say you really need to work on your bouyancy...why would you be dragging your first stages in the silt? I dive deep wrecks that are filled w/ silt and have never had a problem w/ the first stage being affected by silt. Get a MK20/G250 and DIR from the start. Sean -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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