MATERIALS FOR ROTATING AND RING :CARBORUNDUM-CARBORUNDUM. IMPREGNATING RESIN(METAL) GRAPHITE- CARBORUNDUM OPERATIOG PARAMETERS:PRESSURE:0~~2.5MpaTEMPERATURE:-20°C--200°CROTATING SPEED:≤20m/sMEDIUM:OIL ,WATER, SALT,BASE . ORGANIC SOLVENT AND SO ON, Rotary conical single spring pump seal, mechanical seal