... , 3.PSB,long lifetime 4.CE,API,ISO certificates Cast Iron Flange blow down valve :Widely used for gas transmission pipeline ... US, and DIN in Germany. The knife gate valves, parallel slide valves, and eject valvespresent a fine solution regarding abrasion ... ball valve, butterfly valve, globe valve, check valve, plug valves, control valves, etc. asthe leading valve product system, with a caliber ...