Ningbo Sunwell Sealing Materials Co.,Ltd is one of the leading China viton gasket, expanded ptfe sheet, flange insulation gaskets manufacturers and suppliers with one of the famous brands, and we are also a professional viton gasket company and factory, welcome to contact us. Our experienced staff members are always available to discuss your requirements and ensure full customer satisfaction. In recent years, our company has introduced a series of advanced equipment, including fully automatic spiraling machine, CNC machines, double jacketed machine, full range of sheeting machines. In addition, we have attained ISO 9001:2008 certificate.