Valves(gate valves,stainless steel valves,industrial valves) Standards: 1) American 2) Japanese 3) German Valves(gate valves,stainless steel valves,industrial valves)Standards:1) American2) Japanese3) GermanTypes:1) Ball valve2) Check valve3) Butterfly valve4) Safety valve5) Electric valve6) Hydraulic control valve Valves(gate valves,stainless steel valves,industrial valves)