The principle, function and classification of stop valve
Classification:
Release Time：2017-07-12
Globe valve is forced to seal the valve category, when the valve is closed, must be applied to the disc pressure, in order to force the sealing surface does not leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The strength of closing the valve is greater than that of opening the valve. The diameter of the stem must be large, otherwise the failure of the stem top bending will occur. According to the connection of the valve is divided into three types: flange connection, thread connection, welding connection. After the self-sealing valve appears, the medium flow direction of the stop valve enters the valve cavity from above the valve clack.
Globe valveBelongs to the forced sealing valve category, when the valve is closed, must be applied to the valve disc pressure, in order to force the sealing surface does not leak. When the medium enters the valve from below the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The strength of closing the valve is greater than that of opening the valve. The diameter of the stem must be large, otherwise the failure of the stem top bending will occur.
According to the connection of the valve is divided into three types: flange connection, thread connection, welding connection. From the self-sealing valve, the flow of the medium to change from the valve disc into the valve cavity, then under the pressure of the medium, the strength of the valve is small, and the strength of the valve, the diameter of the valve stem can be reduced accordingly. At the same time, under the action of the medium, this form of valve is also more tight. The fully open position of the stop valve should be determined by the stroke of the valve flap.
Valve opening and closing parts is the use of plug-shaped valve, the top of the seal is a plane or sea cone, the valve along the center line of the valve seat for linear motion.Wuhan Xiete Valve Technology Co., Ltd.The production of shut-off valves is very suitable for cutting or regulating and throttling purposes. Because of this type of valve stem opening or closing stroke is relatively short, and has a very reliable cut-off function, and because the change of the valve seat port and the stroke of the valve flap are proportional, it is very suitable for the regulation of flow.
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2026/02/28
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