In the representative embodiment of the invention disclosed herein, a disc valve is cooperatively arranged to include a disc member of a ductile material which is transversely positioned within an enlarged chamber in {HEAD ~ the axial bore} of {TAIL ~ a tubular housing} and sealingly secured to the housing 
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In the representative embodiment of the invention disclosed herein , a disc valve is cooperatively arranged to include a disc member of a ductile material which is transversely positioned within an enlarged chamber in { HEAD ~ the axial bore } of { TAIL ~ a tubular housing } and sealingly secured to the housing
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