... 15 ,25 ,32 ,40 ,50,65 2,Seat ring diameter3,Rated flow coefficient4, Flow characteristic : Linear ,linear ... Main parts materialsPartsMaterialPartsMaterialbodyA105, WC9 etc.packingFlexible graphiteseat ring gasketFlexible graphite+mesh boardglandASTM A182 F316, A276seat ... -45~+400Gland typeBolted glandPackingV shaped PTFE packing,PTFE yarn packing,PTFE-impregnated asbestos yarn,asbestos yarn with ...