Bill Coye Knife Maker Oct 4, 2009 #41 The new LN dewar has a open-cell foam stopper to allow bleed-off. BC
Rusty McDonald KNIFE MAKER Oct 4, 2009 #42 Bill Coye said: The new LN dewar has a open-cell foam stopper to allow bleed-off. BC Click to expand... the new ones have this foam stopper like Bill Said and I think the older ones have a pressure release valve that will automatically let pressure off when it gets too high but those are sealed tanks and are not for the novice.
Bill Coye said: The new LN dewar has a open-cell foam stopper to allow bleed-off. BC Click to expand... the new ones have this foam stopper like Bill Said and I think the older ones have a pressure release valve that will automatically let pressure off when it gets too high but those are sealed tanks and are not for the novice.