AOK specializes in valve stem seals, bonded seals (washers), o rings, and precision custom designed rubber molded products. AOK has distributed valve stem seals globally. The valve stem seals are widely used in automobiles, motorcycles, chemicals, forklifts and semiconductors industries. AOK’s high quality can serve customer with great satisfaction; therefore, the valve stem seals were fully inspected before shipment.


With ISO9001 and TS16949 certification and the ability of in-house mold development, AOK is capable of making various types of rubber products from mold design to finished product. Incorporation CAD/CAM system with advanced CNC machine centers and CNC lathes to design and make molds, AOK provides high quality of valve seal and bonded seal has been assured, and approved by our valued customers from Europe, North America, Asia and China. AOK is honored to have their recognition.



Aok Valve Stem Seals Ltd.

No.,24-6,Nankang 3rd Rd., Nantou City 540 Taiwan

TEL: 886-49-2263777

FAX: 886-49-2263776