The PTFE products have the lowest frictional factor and the best anti-corrosive property among the known plastic materials. The using temperature can range from -180 - Update: 2013-01-15

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 ... - Update: 2013-01-14