Valve device using pipes and method of manufacturing it

An apparatus for manufacturing a conduit valve device comprising:

• a metal mold having a first curved surface, said mold further includes a tubular cavity disposed within said curved surface;
• a die having a second curved surface and is spaced apart from said metal mold;
• a conduit having an opening and an internal volume, said conduit is supported by said metal mold and said die;
• a punch member movably supported within said conduit, said punch member includes first and second diameter portions, said first diameter portion is substantially less than said second diameter portion;
• a punch holder disposed within the conduit and supporting said punch member;
• and
• means for moving said punch member from the internal volume of said conduit through said opening and into said tubular cavity of said metal mold to form a flange means integral with and external to said conduit for substantially reducing turbulent fluid flow.

A conduit valve device comprising:

• a fluid control mechanism;
• a first conduit having a first cross sectional area with a first internal surface and a first external surface, said fluid control mechanism is mounted within said first conduit, said first conduit includes an opening with tubular flange means surrounding said opening on said external surface of said first conduit for substantially reducing turbulent fluid flow, said flange means is integrally formed by said first conduit, said flange means includes a first diameter section and a second diameter section, said first diameter section is greater than said second diameter section;
• and
• a second conduit having a second cross sectional area, said second conduit having a second cross sectional area with a second internal surface and a second external surface, said flange means connects said second conduit to said first conduit, said flange means substantially reduces turbulent fluid flow while substantially reducing erosion, fluid flow noise, and stress concentration regions adjacent said flange means due to externally applied forces on said second conduit.