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John: We were speaking specificaly of the Poseidin Odin second stage which has a inflating/deflating bladder inside the valve housing (essentially a metal barrel serrounded with numerous holes). As the bladder deflates air passes through the holes, when it inflates it stops. The cycle is controlled by a small servo valve at the far end of the tube. The servo valve could freeze if moisture were to work its way through from the 1st stage but this is very unlikely. Ice forming on the outside of the barrel during exhalation in very cold water can break off and form the ice bb's we were talking about. The fact that the ice forms on the outside (low presure side) of the barrel and is blown away by the higher intermediate presure coming through the numerous holes (I've been told 53 but I've never counted) is what makes this such a good cold water regulator. I would rather put up with little ice bb's than a freeflow. Ian you wrote >not true,especially in older regs.At the low pressure seat,you get a large >expansion/cooling effect when the reg cracks under inhale.Any moisture her >has the potential to freeze,locking the lp seat in the open position,causing >freeflow & a further drop in temperature.Depending on the design of the >reg,the seat pressure may not be strong enough to crack the ice & stop the >freeflow. > John L. Dunk o > Tallhassee,Fl. o > screwloose@ne*.co* ______o_________ > > >
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