Die formed graphite ring Die formed graphite packing ring is made of pure flexible graphite , or graphite with nikle/ss316/brass wire reinforced. Performance and features Perfect self lubricant performance. High elasticity coefficiency. Scope of application Working temperature:~200~400íµ(200~800íµ under non-oxidation atmosphere) Working pressure:ín35mpa Density:1.4 ~ 1.6 g/cm3 Max.Machinable size:5~850mm