... service offer manual butterfly valve valve details :1.valve body:cast iron ,wcb ,ss304,ss316,etc2.seal :EPDM...3.Pressure :Pn10-4.lug version ,5 ... ). Sample: We may need 7 days to make the sample with 1 pc , also we need the sample fee and the ... customers,which is the most suitable for the working environment. butterfly valve with worm gear