... and production of copper valves, gas valves, cast steel valves, stainless steel valves, sanitary wares, water meters and various pipe ... Valve For Water,1/2" ~4",PN 16 ISO9001 and ISO14001 approved 100% Pressure Test 1.Technical Standard:Norminal Pressure 1.6MPaWorking Medium:Water ... such as GB, IEC, NBMA, JIS, DIN, etc.(3)We have passed three management system certificates, ISO9001, ISO14001 and ...