baja ngajalin, valves Gerbang, produsén, pabrik, harga, Tekenan disegel bonet, API 602, padet ngaganjel, BW, SW, NPT, Flange, ngurangan bore, bore pinuh, bahan boga A105 (N), F304 (L), F316 ( L), F11, F22, F51, F347, F321, F51, Alloy 20, Monel, Inconel, Hastelloy, Aluminium Perunggu jeung alloy husus lianna.Tekanan ti Kelas 150LB ka 800LB ka 2500LB, china.