Research on Valve Pipe & fittings

Hi i am George. Currently i am sourcing for some manufacture which are making good Valves & Fittings & Pipes in China and Korea. Alternatively Joint Venture can be consider. Can anyone out there advise me?

Valves

Ball, Gate, Globe, Swing Check, Wafer Check, Rubber-lined / High Performance Butterfly, Pressure seal Valve / Bellowseal Valve / Jacketed Valve / Plug Valve / Stop Check.

Valve size - 1/4" - 36"

Valve rating - Class 150 - 2500 / PN / DN

Material - Ductile Iron / Bronze / Carbon Steel / Alloy Steel / Stainless steel / Duplex

Tubes, Pipe & Fittings

Tubes & Pipes size - 1/4" - 48"

Material - Ductile Iron / Bronze / Carbon Steel / Alloy Steel / Stainless steel / Duplex

Fittings size - 1/4" - 48"

Rating - Class 150 - 600

Material - Ductile Iron / Bronze / Carbon Steel / Alloy Steel / Stainless steel / Duplex

Thanks!