Globe valve also known as the door valve, belongs to the forced sealing valve, so when the valve is closed, must apply pressure to the disc, in order to force the sealing surface leakage.When the medium under the disc into the valve, the operating force to overcome the resistance, is the friction of the valve stem and packing and by the pressure of the medium produced by the thrust, the force to close the valve is greater than the force to open the valve, so the diameter of the valve stem to be large, otherwise the valve stem bending fault will occur.According to the connection mode is divided into three kinds: flange connection, screw connection, welding connection.From the appearance of the sealed valve, the flow of the globe valve media will be changed from the upper disc into the valve chamber, then under the action of media pressure, the force to close the valve is small, and the force to open the valve is large, the diameter of the valve stem can be reduced accordingly.At the same time, under the action of the medium, this form of the valve is more rigorous.China's valve "three to" has been stipulated that the flow of the globe valve, all adopt from top to bottom.When the globe valve opens, the opening height of the disc is 25% ~ 30% of the nominal diameter.The flow rate has reached the maximum, indicating that the valve has reached the full open position.So the full open position of the globe valve should be determined by the stroke of the disc.

Stop valve (Globe Valve) is a plug - shaped disc, sealing above the plane or sea cone, disc along the center line of the seat in a straight line.The stem movement form, (common name: dark stem), there are also lifting rotary stem type can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid flow.Therefore, this type of stop globe valve is ideal for cutting or regulating and throttling.Due to the relatively short stem opening or closing stroke of this type of valve, and the very reliable cutting function, and the seat port changes in a direct proportion to the stroke of the disc, it is very suitable for flow regulation.