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Post by ScoobieDoo on Jul 29, 2003 16:33:58 GMT -8
I'm looking at the parts breakdown on the DA Aqua Master and comparing them to today's 1st and 2nd stage regs and I can't figure out for the life of me HOW the air is getting from the 1st stage valve into a 'chamber' where the 2nd stage valve can access it. Can someone explain the pathway the air takes once it gets to the 1st stage valve and TEXT where does it go? My diagram shows the air 'dead-ending' after it gets to the 1st stage diaphragm. I-AM-SPAM?
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Post by stuart jefferies on Aug 1, 2003 3:29:21 GMT -8
Ok, I'm going to try and explaine this as simply as I can. I,m not looking at a picture of the Aquamaster but here goes. When the reg is not on the tank the large spring behind the first stage diaphragm forces the high pressure seat into an open position. It is not until the reg is pressurised that the air pressure pushes on the diaphragm and spring and this is when the small spring behind the high pressure seat comes into play. The air goes around the high pressure seat, through the (volcano) into the second stage chamber, which is infact a small space between the first stage diaphragm and second stage valve. There is a pin that connects the high pressure valve to the first stage diaphragm, so when one moves so does the other. A push pull system. So when the tank is opened , air rushes in and pushes against the diaphragm, and the high pressure seat shuts against the volcano. It takes a pressure of approx 100 PSI to do this, hence the air in the space between the two stages is of that pressure. You might think that there is not enough air to take a breath from this and you would be right. When you breathe, you drain air from the chamber and it is replaced at the rate that it is used constantly giving air at 100 PSI. If you look at the picture it may seem that the high pressure seat would block air but it is infact shaped to allow air to go round. Well I hope I havn't confused you too much. It is quite simple when you when you understand how it works. Stuart
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