supply of 80 nb double disc valve with matching flange with cylinder supply of 80 nb double disc valve with matching flange with cylinder , 80 nb double disc valve with matching flange with cylinder end cover-alloy cast iron 250 bhn ( min ) / ductile iron, middle ring- alloy cast iron 250 bhn ( min ) / ductile iron, disc-wear resistant special alloy 500 bhn ( min ) , seat ring- wear resistant special alloy 500 bhn ( min ) , gland- leaded tin bronex, gland packing- kevlar packing, pin- stainless steel, disc drive- carbon steel, spring- spring steel, pneumatic actuator- double acting actuator, working pressure rating: 6 bar, end connection: ansi b 16.1, class 125 of to suit customer requirement, actuator- pneumatic air cylinder double acting