... . Extremely wear resistant. Timely delivery High pressure. High pressure control valveMainly technical inspection1,Nominal size(mm); 6 ,10 ,15 ,25 ... gasketASTM A276 431cover boardASTM A29 1045discFlexible graphite+316bonnetA216 WCB, 316 etc.bonnet gasketFlexible graphite+mesh boardcage gasketFlexible graphite+mesh boardmain ... yarn,asbestos yarn with graphite,graphite packing High pressure control valve