RiyuanSpecs:DN40-DN500Ningbo Riyuan fluoroplastics Technology Co., LtdNingbo riyuan fluoroplastics Technology Co., Ltd. is a professional company specializing in the research, design, manufacture and butterfly valve seat Sealing parts. With advanced science and technology and rich experience in fluid control, it provides solutions for the application technology of fluid medium corrosion, pressure, temperature and flow control.