PEEK sleeve has the advantages of high temperature resistance, wear resistance, corrosion resistance, self-lubrication and the like. Compared with metal materials, it has the advantages of light weight and low noise. PEEK has the heat resistance, chemical stability of thermosetting plastics and the processing ability of thermoplastic molding. PEEK has a long-term service temperature of about 260-280℃, a short-term service temperature of 330℃, and a high pressure resistance of up to 30MPa. In addition, it is the good material of high temperature sealing rings. PEEK products are suitable for all kinds of harsh working conditions in the environment. PEEK also has excellent properties such as good self-lubrication, easy processing, stable insulation and hydrolysis resistance, which makes it widely used in aerospace, automobile manufacturing, electrical and electronic, medical treatment and food processing and other fields. Due to the unique performance advantages of PEEK materials, PEEK products can be widely used in petrochemical engineering, electronic and electrical, instrumentation, machinery and automobiles, medical and health care, aerospace, military, nuclear energy and many other fields.