... Fine sealing and control performance. Extremely wear resistant. Timely delivery High pressure. High pressure control valveMainly technical inspection1,Nominal size(mm); 6 ,10 , ... 326, Single pressure :standard signal :20~100;other signals : 40~200;60~180Instruction :1,this series can be used in medium ... -impregnated asbestos yarn,asbestos yarn with graphite,graphite packing High pressure control valve