Super Duplex Valve Supplier in Mexico South American Valve is a well-known Super duplex valve supplier in Mexico (Válvula super dúplex). A super duplex valve is a valve made from super duplex stainless steel, which is a type of stainless steel that contains a high level of chromium, molybdenum, and nitrogen. This combination of elements gives super duplex stainless steel excellent resistance to corrosion, high...