... can produce gate, globe, check, ball and butterfly valves with the materials of ductile iron, carbon steel, alloy steel, stainless steel, ... materials available to order. Our products are designed and manufactured in accordance with the standards of GB, ASME, ANSI, API, BS, DIN, JIS ... our clients on your request.Certificates: We have held the certificates of ISO, ISO 9001, SAI Global Watermark, ABS ( ...