At present, the first-line brand manufacturers of valves include the following: 1. Atlas Copco: a world-leading manufacturer of industrial tools and equipment. Its valve products are widely used in various industries. industry.

2. Siemens: A world-renowned manufacturer of industrial automation and electrical equipment, its valve products have a high reputation in the industrial field.

3. Emerson: A leading global provider of industrial automation solutions, its valve products have strong technical strength in fluid control and regulation.

4. Schlumberger: A leading global oil and gas service company, its valve products are widely used in the oil and gas industry.

5. Wilkerson (Velan): A company specializing in valve design and manufacturing. Its products cover various types of valves, including ball valves, gate valves, butterfly valves, etc.

6. Suzhou Neway Valve Co., Ltd. (Trademark: Neway)

7. Shanghai Guanlong Valve Machinery Co., Ltd. (Trademark: Guanlong)

8. Shanghai Qizhong Valve Manufacturing Co., Ltd. (trademark: Qizhong)

9. Sanhua Holding Group Co., Ltd. (trademark: Sanhua)

10. Chaoda Valve Group Co., Ltd. (Trademark: Chaoda)

11. Jiangsu Shentong Valve Co., Ltd. (Trademark: Shentong)

12. CNNC Suva Technology Co., Ltd. (Trademark: Su Valve)

13. Zhuzhou Nanfang Valve Co., Ltd. (trademark: Nanfang)

14. Jiangnan Valve Co., Ltd. Holding Group (trademark: Jiangyi)

15. Jiangsu Suyan Valve Machinery Co., Ltd. (trademark: Suyan) The above are some of the first-line brand manufacturers in the valve industry, covering multiple countries and regions and involving various types of valve products.