YIYU.YIYU was established on October 16, 2008, with its registered office located in Wenzhou City, Zhejiang Province. YIYU's early business focused on serving valve manufacturers, providing professional valve seal leakage solutions. Since 2004, we have produced metal ring gaskets for international brands such as Japan's Walka, Japan's Nikkas, and Klinger. Our company currently manufactures weld-free metal gasket rings with a maximum diameter of φ2500MM. YIYU is a specialized domestic manufacturer of metal gaskets. Our products hold high-end professional certifications including American Petroleum Institute (API) 6A, API 17D, China's National Special Equipment Manufacturing License (TS), and China GC certification. Among these, API 6A and API 17D represent highly specialized certifications for metal gaskets with stringent audit requirements. Furthermore, our company's advanced technical expertise has earned recognition from industry experts. We participated in drafting national mechanical industry standards and served as one of the drafting units for metal ring gaskets. Our primary products include: sealing gaskets, sealing washers, mechanical seals, sealing rings, and packing.
