Seal rings for a wide variety of pumps , reaction containers of mechanical devices. working under high temperature or chemical conditions, carbon and graphite seal rings are used to replace metal or plastic materials . According to different operation methods, there are two types , the stationary seal rings and rotary seal rings.

Because there are too many kinds of pumps, reaction containers, and their work conditions is complicated, it is necessary to know operation conditions well, before choosing suitable grades of carbon graphite .