Ret ring with concentric serrations made of various types of metal. Serration peaks gasket was used when bolting force is not sufficient to seal a flat gasket, because it contacts flange face only at serration peaks. Commonly used on valve bannets and flanges attached to equipment. 3 types of cross section as per right table are available. Serration peaks gasket Festures: (1) Serration peaks gasket is suitable for high temperature and high pressure application. (2) High corrosion resistance. (3) Constant and teliable sealing. 　 Serration peaks gasket Application (1) Working temperature:650°C (2) Working pressure:6.4 to 　　　　　25.0 MPa (3) Minimum pre-tightening 　　　　　specific pressure: y=70MPa (4) Gasket coefficient: m=4.25