不锈钢硬密封蝶阀采用精密的J形弹性密封圈和三偏心多层次金属硬密封结构，被广泛用于介质温度≤425℃的治金、电力、石油化工、以及给排水和市政建设等工业管道上，作调节流量和载断流体使用。采用三偏心结构，阀座与碟板密封面均采用不同硬度和不锈钢制作，具有良好的耐腐蚀性，使用寿命长，本阀均有双向密封功能，产品符合阀门压力试验标准。
Stainless steel hard seal butterfly valve adopts precise J-shaped elastic seal ring and three eccentric multi-level metal hard seal structure. It is widely used in metal treatment, electric power, petrochemical industry, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤ 425 ℃, as a flow regulator and flow carrier. It adopts three eccentric structure, and the sealing surface of valve seat and disc plate are made of stainless steel with different hardness, which has good corrosion resistance and long service life. This valve has two-way sealing function, and the product meets the national valve pressure test standard.
不锈钢硬密封蝶阀为偏心金属密封结构，密封形式为金属对金属密封，可调换金属密封圈对金属密封，不锈钢板与石墨复合板密封圈对金属密封。驱动形式除了电动之外还有:手动，蜗轮杆传动，气动等。
The stainless steel hard seal butterfly valve is an eccentric metal seal structure, and the seal form is metal to metal seal. The replaceable metal seal ring is metal seal, and the stainless steel plate and graphite composite plate seal ring are metal seal. Besides electric drive, there are also manual drive, worm gear rod drive, pneumatic drive, etc.
下面让我们来了解一下在使用不锈钢硬密封蝶阀过程中可能出现的问题有哪些吧。
Now let's learn about the possible problems in the use of stainless steel hard seal butterfly valves.
一、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、 Since the multi-layer soft and hard laminated seal ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive scouring on its sealing surface, and the soft sealing belt in the metal sheet interlayer is washed, which directly affects the sealing performance.
二、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、 Limited by the structural conditions, this structure is not suitable for valves with a diameter below DN200, because the overall structure of the valve plate is too thick and the flow resistance is large.
三、因三偏心结构的原理，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 three eccentric structure, the sealing between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to press the valve plate towards the valve seat. In the positive flow state, the higher the medium pressure, the tighter the seal extrusion. When the medium in the channel flows against the flow, with the increase of the medium pressure, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the seal begins to leak.
其特征在于:所述阀座密封圈由软性T形密封环两侧多层不锈钢片组成。
The utility model is characterized in that the valve seat sealing ring is composed of multiple stainless steel sheets on both sides of a soft T-shaped sealing ring.
阀板与阀座的密封面为斜圆锥结构，在阀板斜圆锥表面堆焊耐温、耐蚀合金材料;固定在调节环压板之间的弹簧与压板上调节螺栓装配一起的结构。
The sealing surface of the valve plate and the valve seat is an inclined conical structure, and the inclined conical surface of the valve plate is overlaid with temperature resistant and corrosion-resistant alloy materials; The spring fixed between the pressing plates of the adjusting ring is assembled with the adjusting bolt on the pressing plate.
这种结构有效地补偿了轴套与阀体之间的公差带及阀杆在介质压力下的弹性变形，了阀门在双向互换的介质输送过程中存在的密封问题。
This structure effectively compensates the tolerance zone between the shaft sleeve and the valve body and the elastic deformation of the valve stem under the medium pressure, and solves the sealing problem of the valve in the process of two-way interchangeable medium transmission.
The above is a detailed introduction about Shandong Sales Office of Shanghai Lianggong valve. I hope it will help you If you have any questions, please contact us We will provide you with professional service http://www.jnlgvf.com
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