Open-rod/dark-rod nodular cast iron flange gate valve is a kind of nodular cast iron material made of flange gate valve, with high strength, wear resistance and good seismic performance. This kind of valve is widely used in various construction machinery, petroleum, chemical industry, water treatment and other fields to achieve the cutting off, circulation and regulation of pipeline media.
Open rod/dark rod ductile iron flange gate valves include DN250, DN300, DN400, DN500, DN600, DN700, DN800 and DN900 and other sizes to meet the connection needs of different pipelines. The connection mode of the valve is flange connection, which is easy to install and maintain.
Open rod and dark rod are the two operating modes of nodular cast iron flange gate valve. Open rod operation means that the opening and closing of the valve directly acts on the valve stem through the hand wheel, and the operation is intuitive and simple. The hidden rod operation is to convert the rotating motion of the handwheel through the valve stem nut into a straight line movement of the valve stem, so that the valve is opened or closed. Dark rod operation is more stable than open rod operation, suitable for high pressure, large diameter valves.
In general, open rod/dark rod ductile iron flange gate valve with its excellent material properties and a variety of size specifications, widely used in all kinds of projects, for the safe and reliable operation of the pipeline system provides a strong guarantee.
