The use of globe valves is as follows: Globe valves are used in most media flow systems. Has developed to meet the petrochemical, electricity, metallurgy, urban construction, chemical and other sectors of the various forms of the globe valve. The use of stop valves is extremely common, but the larger the opening and closing torques, the longer the length of the structure, usually the nominal diameter is limited to below 250mm, but also to 400mm, but the choice of special attention to import and export direction. Most of the following 15Omm most of the cut-off valve media most of the inflow from the valve below, and more than 2O0mm most of the globe valve medium inflow from the top of the valve. This is due to the closing torque of the valve. In order to reduce the opening or closing torque, generally more than 2O0mm off valve are provided within the bypass or bypass valve. The most obvious advantages of the stop valve are: (l) During the opening and closing process, the wear resistance is achieved due to the smaller friction between the valve disc and the sealing surface of the valve body than the gate valve. (2) The opening height is generally only l / 4 of the diameter of the valve seat passageway and is therefore much smaller than the gate valve. (3) Usually there is only one sealing surface on the valve body and the valve flap, so the manufacturing technology is relatively good and easy to maintain. However, the shortcomings of the globe valve can not be ignored. The main disadvantage is the large flow resistance coefficient, resulting in pressure loss, especially in the hydraulic device, this pressure loss is particularly evident. More keyword search: Globe valve