Models AG110, AG120 control valve are used for throttling or on-off control of a wide variety of low-temperature liquids and gases. The valve has an unbalanced plug with a guide construction between the bonnet and the top of the plug by which can make it opening steadily. And for model AG120 control valve there’s another guide construction between the seat and the bottom of the plug that makes the valve have a better stability. Models AG110, AG120 control valve has various flow characteristic by different design of the plug.