Composite insulator for railway traction lines is used in tunnels of electrified railway under severe conditions. They can effectively prevent pollution flashover outage and free from cleaning and maintenance work. It will hold on not only tension, but also bending. With a very small size, they can hardly be substituted by porcelain or glass insulators in case if small tunnel space.

The (Silicon Rubber)Composite railway insulator is used in tunnels of electrified railway under severe conditions. The (Silicon Rubber)Composite railway insulator can effectively prevent pollution flashover outage and free from cleaning maintenance work with a very small size ,they can be substituted by porcelain or glass insulators in case of small tunnel space. Usually ,they could be manufactured by means of injection whole-molding technology. The juncture between end fitting and core is totally embedded in HTV silicon rubber,emilinating conventional and traditional seal defects.