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