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.

衬氟蝶阀在使用过程中存在的问题：

Problems in the use of fluorine lined butterfly valves:

1、由于多层软硬叠式密封圈固定在阀板上，当阀板常开状态时介质对其密封面形成正面冲刷，金属片夹层中的软密封带受冲刷后，直接影响密封性能。

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、受结构条件的限制该结构不适应做通径DN200以下阀门，原因是阀板整体结构太厚，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、因衬胶蝶阀的原理，阀板的密封面与阀座之间的密封是靠传动装置的力矩使阀板压向阀座。正流状态时，介质压力越高密封挤压越紧。当流道介质逆流时随着介质压力的增大阀板与阀座之间的单位正压力小于介质压强时，密封开始泄漏。

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.

衬氟蝶阀是采用多层软硬叠的密封圈来达到密封效果的。而如果阀板处于常开的状态下，很容易造成其密封面的被冲击性，从而使得其密封性能受到影响。而且在结构的限制之下，这种类型的阀门是不能够在通径DN200下使用的，因为其阀板本身的结构太厚，使用这种范儿会造成较大的流阻，不利于对介质输送的管理。

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.

而且由于这种阀门的工作原理，阀板的密封面以及其密封性能都是需要借助传动装置的力矩来实现的。在正常的流速之下，介质的压力高低是决定着其密封性的强弱的。如果其压力较小，那么则很容易导致密封性能较差，从而引起泄露的情况发生。

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.

作为一种将密封圈安装在阀板上的阀门，其主要的缺陷之处就在于密封性。如果因为使用不当或者是压力的不足等因素造成的密封性能较差的话，那么就会影响到阀门的整体性能。

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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