Shanghai Yunlong Marine Valve Co., Ltd. is a modern professional valve manufacturing enterprise integrating research, development, production, and sales. It is a member of the China Valve Association, a primary supplier network member of China National Petroleum Corporation, a joint venture of China's shipbuilding industry, a member of the China Marine Machinery Standardization Technical Committee, and a member of the National Valve Standardization Technical Committee. The company boasts strong technical capabilities, rich design experience, advanced production equipment, sophisticated manufacturing processes, comprehensive testing methods, and a rigorous operational system. Strict management ensures the production of high-quality and reliable products. The company's products are manufactured in accordance with technical standards and drawings such as Chinese National Standard GB, Ministry Standards CB and JB, Japanese Standard JIS, American Standard API, German Standard DIN, and foreign trade standard CBM. The current product range includes over 200 series and more than 2,000 specifications. Main products include various specifications of marine butterfly valves, gate valves, globe valves, ball valves, needle valves, regulating valves, throttle valves, plunger valves, check valves, safety valves, pressure reducing valves, self-closing valves, quick-closing valves, stop-check valves, hose valves, plug valves, mud boxes, sea valves, seawater filters, oil filters, anti-splash valves, air caps, sounding self-closing valves, hydraulic control valves, marine valves, and high-temperature high-pressure power station valves. Valve body materials include carbon steel, cast iron, stainless steel, bronze, brass, forged steel, and alloy steel. Sealing surface materials include copper alloy, carburized steel, hard alloy, rubber, plastic, and PTFE for soft and hard seals, catering to the needs of different media. Products are widely used in petrochemicals, shipping, nuclear power, chemicals, metallurgy, electric power, food, environmental protection, construction, and other fields. The company has passed the ZC type approval of the Ship Inspection Bureau and has obtained factory approvals from classification societies such as China "CCS", Germany "GL", UK "LR", Norway "DNV", France "BV", Italy "RINA", USA "ABS", Japan "NK", and Korea "KR". It has also passed the ISO9001-2008 international quality system certification. Products have undergone performance tests by the Shanghai Mechanical and Electrical Product Quality Supervision Center and have received approvals from quality supervision authorities MA and ML. The company has been rated as an AAA-level誠信 unit by the * Integrity Promotion Association, a "Quality Stable and Qualified Unit" by China Quality萬里行, and a recommended product by the Water Supply and Drainage Association of the Ministry of Construction and the China Light Industry Bureau. Since its establishment, the company has adhered to the business philosophy of "quality as the foundation, credibility for survival, technology for development, and service to win customers" to provide excellent products and comprehensive services. We sincerely welcome new and old customers and business partners to visit, inspect, discuss cooperation, and create a better future together.