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It was determined after careful study that one of the safest and most
reliable sealing techniques, is the captured O-Ring method presently utilized
on all DIN 477 standard 1st stage regulators.  OMS valves use the same, exact
captured O-Ring sealing method.

Terho>	It's not that simple ! The captured design
	alone don't help much if the other things are
	not designed properly. These other things
	include O-ring material and hardness, valve
	material and surface finnish quality, valve
	tolerances, shape and size of the ring slot,
	O-ring compression ratio and a special
	high pressure support ring beside the O-ring.

	I have seen many self-made lamps, etc. where
	these things are done poorly because people think
	that using O-rings is something very simple !
	I have done professional O-ring design work
	and recommend strogly to think twice or get
	more information before self-made ring assemblies
	are designed. There're no reason to ruin good idea
	by poor implementation.

	All this is not related to OMS, I do not know
	how they have done it. I just wanted to point
	out few things for all self-made-men.

	Terho

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