Zhongshan good valve Co., Ltd places great importance on raw materials used in the manufacturing of 4 inch ball valve-carbon steel ball valve. Each batch of raw materials is selected by our experienced team. When raw materials arrive at our factory, we take good care of processing them. We totally eliminate defective materials from our inspections.. With the rapid globalization, delivering a competitive FLOS brand is essential. We are going global through maintaining brand consistency and enhancing our image. For example, we have established a positive brand reputation management system including search engine optimization, website marketing, and social media marketing.. Our dedicated and knowledgeable staff have extensive experience and expertise. To meet the quality standards and provide high quality services at FLOS Ball Valve, our employees participate in international cooperation, internal refresher courses, and a wide variety of external courses in the areas of technology and communication skills..