Mechanical seal a.Density:1.60-1.90 g/cm3 b.graphite pipe,block , rod c.good sealing ability d ... are graphite seals, graphite bushings, etc. Products are widely used in textile equipment, chemical, pump, mould, mechanical equipment and other industries ... are graphite seals, graphite bushings, etc. Products are widely used in textile equipment, chemical, pump, mould, mechanical equipment and other ...