電動法蘭截止閥的閥桿軸線與閥座密封面垂直，閥桿開啟或關閉行程相對較短，具有非常可靠的切斷動作，使得這種閥門非常適合作為介質(zhì)的切斷或調(diào)節(jié)及節(jié)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.
電動法蘭截止閥按其通道位置可分為直通式，三通式和直角式。后兩種閘閥用于分配介質(zhì)與改變介質(zhì)的流向。閘閥開關輕便，體積小，可以做成很大口徑，密封可靠，結(jié)構簡單，維修方便，密封面與球面常在閉合狀態(tài)，不易被介質(zhì)沖蝕，在各行業(yè)得到廣泛的應用。電動法蘭截止閥流體阻力小，其阻力系數(shù)與同長度的管段相等，結(jié)構簡單、體積小、重量輕，緊密可靠，目前閘閥的密封面材料廣泛使用塑料、密封性好，在真空系統(tǒng)中也已廣泛使用。
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.
電動法蘭截止閥結(jié)構特點
Structural characteristics of electric flange stop valve
(1)電動法蘭截止閥結(jié)構比閘閥簡單，制造與維修都較方便。
(1) The structure of electric flange stop valve is simpler than that of gate valve, and it is convenient to manufacture and maintain.
(2)密封面不易磨損及擦傷，密封性好，啟閉時閥瓣與閥體密封面之間無相對滑動，因而磨損與擦傷均不嚴重，密封性能好，使用壽命長。
(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)啟閉時，閥瓣行程小，因而截止閥高度比閘閥小，但結(jié)構長度比閘閥長。
(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)啟閉力矩大、啟閉較費力，啟閉時間校長。
(4) The opening and closing torque is large, the opening and closing is laborious, and the opening and closing time is long.
(5)流體阻力大，因閥體內(nèi)介質(zhì)通道較曲折，流體阻力大，動力消耗大。
(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)介質(zhì)流動方向公稱壓力PN≤16MPa時，一般采用順流，介質(zhì)從閥瓣下方向；公稱壓力PN≥20MPa時，一般采用逆流，介質(zhì)從閥瓣上方向下流．以增加密封件能。使用時，截止閥介質(zhì)只能單方向流動，不能改變流動方向。
(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)全開時閥瓣經(jīng)常受沖蝕。
(7) The valve disc is often eroded when it is fully opened.
電動法蘭截止閥的閥桿軸線與閥座密封面垂直。閥桿開啟或關閉行程相對較短，并具有非常可靠的切斷動作，使得這種閥門適合作為介質(zhì)的切斷或調(diào)節(jié)及節(jié)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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