Profile: China Yonglong Valve Co., Ltd. manufactures valve products. We are an ISO 9001 and CE certified company. Our products include gate, ball, butterfly, cast steel, forged steel globe, alloy steel, forged steel check and duplex stainless steel valves. Our valves are manufactured as per ANSI, API, MSS, JIS, DIN and BS standards. We manufacture our valve products with carbon, stainless, alloy and special steel materials such as alloy & duplex stainless steel. Our products are widely used in oilfield, oil refinery plant, petroleum, chemical, power station and city pipeline networks.