Material:PTFE Certificate:CE,API,ISO9001 Trunnion ball valve is the class-1 supplier for CNPC,CAO,CNOOC,Sinopec ... - Type:Welded trunnion ball valve- Processing: Long delivery pipes of natural gas- Method: Handle ... ISO9001:2000, CE ,API,LRQA,TSSuitable medium General type :Water,Oil and natural gasAntisulphur type :Natural gas containing H2S and ...