the following are the list of top ball valves manufacturers :

1. ege industrial controls in Turkey
2. galassi & ortolani srl in Italy
3. Chemtech Industrial Valves Ltd in India
4. Fangyuan Valve Group Co. Ltd in china
5. Zhejiang Tehorn Valve Co. Ltd in China
6. Laizhou dongsheng valve co. ltd in china
7. arflu industrial valves in spain
8. Sanco Valves Pvt. Ltd in India
9. AMCO INDUSTRIAL VALVES in India
10. Wenzhou Xindeli Valve Co. Ltd in china
11. Flowjet VALVES in india
12. DALSONS VALVES in india
13. Zhejiang Wod Valve Co. Ltd in China
14. Jiangsu Shoulong Valve Co. Ltd in China
15. burçelik vana in Turkey
16. faf valve company in Turkey
17. vastas valves in Turkey
18. Zhejiang Jieyu Valve Co. Ltd in China
19. Zhejiang RST Valve Technology Co. Ltd in China
20. Wenzhou Yuzheng Valve Co. Ltd in China
21. ZHEJIANG WONSTON VALVE CO. LTD in China
22. Zhejiang BaoShiJia Valve Co. ltd in China
23. Zhejiang Jewelry Fluid Valves Co. Ltd in China
24. ZHEJIANG WENBAO VALVE CO. LTD in China
25. Zhejiang Ouming Fluid Casting Industry Co. Ltd in China
26. Zhejiang Naibang Valve CO. LTD in China
27. ZHEJIANG DECA CONTROL VALVE METER CO. LTD in China
28. WENZHOU AEA VALVE CO. LTD in China
29. TAIZHOU XINGNUO TECHNOLOGY CO. LTD in China
30. ANHUI SUNVAL INTERNATIONAL CO. LTD in China
31. hawa valves india pvt ltd in india
32. VIP Valves (India) Pvt. Ltd.
33. KHD Valves Automation Pvt Ltd in India

What is ball valves 

Ball valve A valve driven by a valve stem that rotates about the axis of a ball valve. Can also be used for fluid regulation and control, this type of valve in the pipeline should generally be installed horizontally.