电动法兰截止阀的阀杆轴线与阀座密封面垂直，阀杆开启或关闭行程相对较短，具有非常可靠的切断动作，使得这种阀门非常适合作为介质的切断或调节及节流使用。
The axis of the valve rod of the electric flange stop valve is perpendicular to the sealing surface of the valve seat, and the opening or closing stroke of the valve rod is relatively short, which has a very reliable cut-off action, making this valve very suitable for cutting off or adjusting and throttling as a medium.
电动法兰截止阀按其通道位置可分为直通式，三通式和直角式。后两种闸阀用于分配介质与改变介质的流向。闸阀开关轻便，体积小，可以做成很大口径，密封可靠，结构简单，维修方便，密封面与球面常在闭合状态，不易被介质冲蚀，在各行业得到广泛的应用。电动法兰截止阀流体阻力小，其阻力系数与同长度的管段相等，结构简单、体积小、重量轻，紧密可靠，目前闸阀的密封面材料广泛使用塑料、密封性好，在真空系统中也已广泛使用。
The electric flange stop valve can be divided into straight through type, three-way type and right angle type according to its channel position. The latter two kinds of gate valves are used to distribute media and change the flow direction of media. The gate valve has the advantages of light switch, small volume, large diameter, reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often closed, which is not easy to be eroded by the medium, and is widely used in various industries. The electric flange stop valve has small fluid resistance, its resistance coefficient is the same as that of the pipe section with the same length, simple structure, small volume, light weight, compact and reliable. At present, the sealing surface material of the gate valve is widely used plastic, with good sealing performance, and has also been widely used in the vacuum system.
电动法兰截止阀结构特点
Structural characteristics of electric flange stop valve
(1)电动法兰截止阀结构比闸阀简单，制造与维修都较方便。
(1) The structure of electric flange stop valve is simpler than that of gate valve, and it is convenient to manufacture and maintain.
(2)密封面不易磨损及擦伤，密封性好，启闭时阀瓣与阀体密封面之间无相对滑动，因而磨损与擦伤均不严重，密封性能好，使用寿命长。
(2) The sealing surface is not easy to wear and scratch, and has good sealing performance. There is no relative sliding between the valve disc and the sealing surface of the valve body when opening and closing, so the wear and scratch are not serious, the sealing performance is good, and the service life is long.
(3)启闭时，阀瓣行程小，因而截止阀高度比闸阀小，但结构长度比闸阀长。
(3) When opening and closing, the valve disc stroke is small, so the height of the stop valve is smaller than that of the gate valve, but the structural length is longer than that of the gate valve.
(4)启闭力矩大、启闭较费力，启闭时间校长。
(4) The opening and closing torque is large, the opening and closing is laborious, and the opening and closing time is long.
(5)流体阻力大，因阀体内介质通道较曲折，流体阻力大，动力消耗大。
(5) The fluid resistance is large, because the medium channel in the valve body is tortuous, the fluid resistance is large, and the power consumption is large.
(6)介质流动方向公称压力PN≤16MPa时，一般采用顺流，介质从阀瓣下方向；公称压力PN≥20MPa时，一般采用逆流，介质从阀瓣上方向下流．以增加密封件能。使用时，截止阀介质只能单方向流动，不能改变流动方向。
(6) When the nominal pressure of the medium flow direction PN ≤ 16MPa, it is generally downstream, and the medium flows upward from the lower direction of the valve disc; When the nominal pressure PN ≥ 20MPa, the reverse flow is generally adopted, and the medium flows downward from the upper direction of the valve disc to increase the seal energy. When in use, the medium of the stop valve can only flow in one direction, and the flow direction cannot be changed.
(7)全开时阀瓣经常受冲蚀。
(7) The valve disc is often eroded when it is fully opened.
电动法兰截止阀的阀杆轴线与阀座密封面垂直。阀杆开启或关闭行程相对较短，并具有非常可靠的切断动作，使得这种阀门适合作为介质的切断或调节及节流使用。
The axis of the valve rod of the electric flange stop valve is perpendicular to the sealing surface of the valve seat. The opening or closing stroke of the valve rod is relatively short, and it has a very reliable cut-off action, which makes this valve suitable for cutting off or adjusting the medium and throttling.
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