... and control performance. Extremely wear resistant. Timely delivery High pressure. High pressure control valveMainly technical inspection1,Nominal size(mm); 6 , ... coefficient4, Flow characteristic : Linear ,linear ,equal percentage5, Nominal pressure: 22 326, Single pressure :standard signal :20~100;other signals : 40~200; ... yarn,asbestos yarn with graphite,graphite packing High pressure control valve