The butterfly plate of the fluorine lined butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc shaped butterfly plate rotates around the axis, with a rotation angle between 0 ° and 90 °. When rotated to 90 °, the valve is in a fully open state. Fluorine lined butterfly valves and rubber lined butterfly valves, as components used to achieve on-off and flow control in pipeline systems, have been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower, and so on.

襯氟蝶閥在使用過程中存在的問題：

Problems in the use of fluorine lined butterfly valves:

1、由于多層軟硬疊式密封圈固定在閥板上，當閥板常開狀態時介質對其密封面形成正面沖刷，金屬片夾層中的軟密封帶受沖刷后，直接影響密封性能。

1. Due to the multi-layer soft and hard laminated sealing ring fixed on the valve plate, when the valve plate is normally open, the medium forms a positive erosion on its sealing surface, and the soft sealing belt in the metal interlayer is directly affected by the erosion, which directly affects the sealing performance.

2、受結構條件的限制該結構不適應做通徑DN200以下閥門，原因是閥板整體結構太厚，流阻大。

2. Due to structural limitations, this structure is not suitable for valves with a diameter below DN200, as the overall structure of the valve plate is too thick and the flow resistance is large.

3、因襯膠蝶閥的原理，閥板的密封面與閥座之間的密封是靠傳動裝置的力矩使閥板壓向閥座。正流狀態時，介質壓力越高密封擠壓越緊。當流道介質逆流時隨著介質壓力的增大閥板與閥座之間的單位正壓力小于介質壓強時，密封開始泄漏。

3. Due to the principle of rubber lined butterfly valves, the sealing between the sealing surface of the valve plate and the valve seat relies on the torque of the transmission device to press the valve plate towards the valve seat. When in a positive flow state, the higher the medium pressure, the tighter the sealing compression. When the medium in the flow channel is in reverse flow, as the pressure of the medium increases, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the seal begins to leak.

襯氟蝶閥是采用多層軟硬疊的密封圈來達到密封效果的。而如果閥板處于常開的狀態下，很容易造成其密封面的被沖擊性，從而使得其密封性能受到影響。而且在結構的限制之下，這種類型的閥門是不能夠在通徑DN200下使用的，因為其閥板本身的結構太厚，使用這種范兒會造成較大的流阻，不利于對介質輸送的管理。

Fluorine lined butterfly valves use multiple layers of soft and hard stacked sealing rings to achieve sealing effect. If the valve plate is in a normally open state, it is easy to cause impact on its sealing surface, thereby affecting its sealing performance. Moreover, due to structural limitations, this type of valve cannot be used with a diameter of DN200 because the valve plate itself has a thick structure, which can cause significant flow resistance and is not conducive to the management of medium transportation.

而且由于這種閥門的工作原理，閥板的密封面以及其密封性能都是需要借助傳動裝置的力矩來實現的。在正常的流速之下，介質的壓力高低是決定著其密封性的強弱的。如果其壓力較小，那么則很容易導致密封性能較差，從而引起泄露的情況發生。

Moreover, due to the working principle of this valve, the sealing surface of the valve plate and its sealing performance require the torque of the transmission device to achieve. Under normal flow rates, the pressure level of the medium determines the strength of its sealing performance. If the pressure is low, it is easy to cause poor sealing performance, leading to leakage.

作為一種將密封圈安裝在閥板上的閥門，其主要的缺陷之處就在于密封性。如果因為使用不當或者是壓力的不足等因素造成的密封性能較差的話，那么就會影響到閥門的整體性能。

As a valve that installs a sealing ring on the valve plate, its main drawback lies in its sealing performance. If the sealing performance is poor due to improper use or insufficient pressure, it will affect the overall performance of the valve.

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