一、进口双向焊接蝶阀概述

进口双向焊接蝶阀（美国威盾VTON），Double welded butterfly valve，是指采用精密的J形弹性密封圈和三偏心多层次金属硬密封结构，采用对焊的连接方式，广泛用于供暖、供热，治金、电力、石油化工等工业管道上，作调节流量和载断流体使用，作调节流量和载断流体使用的蝶阀。

美国威盾VTON双向焊接蝶阀分为铸钢双向焊接蝶阀，不锈钢双向焊接蝶阀，铬钼钢焊接蝶阀，焊接蝶阀采用三偏心结构，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，双向焊接蝶阀有双向密封功能。Double welded butterfly valve (VTON) refers to a butterfly valve that uses a precision J-shaped elastic sealing ring and a three-level metal hard sealing structure with three eccentricities. It adopts a butt welding connection method and is widely used in industrial pipelines such as heating, metallurgy, power, and petrochemicals. It is used for regulating flow and carrying fluid, and for regulating flow and carrying fluid.

VTON bi-directional welding butterfly valves are divided into cast steel bi-directional welding butterfly valves, stainless steel bi-directional welding butterfly valves, chromium molybdenum steel welding butterfly valves. The welding butterfly valve adopts a three eccentric structure, and the valve seat and disc plate sealing surface are made of different hardness and stainless steel, which has good corrosion resistance and long service life. The bi-directional welding butterfly valve has a bi-directional sealing function.

二、进口双向焊接蝶阀参数

三、进口双向焊接蝶阀特征

双向焊接蝶阀主要特征是结构紧凑、重量轻、便于安装、流阻小、流通量大，避免高温膨胀的影响，操作轻便。体内无连杆、螺栓等、工作可靠、使用寿命长。可以多工位安装，不受介质流向影响。

1. 进口双向焊接蝶阀采用三偏心结构，蝶板与阀座瞬间接触或脱离，真正实现零磨损、零泄漏；

2. 进口双向焊接蝶阀由于密封圈被完全镶嵌于蝶板内，维护时不用将整个阀门拆下，更换方便，大大降低了维护成本；

3. 进口双向焊接蝶阀密封圈采用软硬层叠式不锈钢片和柔性石墨板（石墨橡胶板、石棉橡胶板等）的密封面，使其具有金属硬密封和弹性密封的双重优点，无论在低温和高温工况下均有优良的密封性能。

4. 进口双向焊接蝶阀阀座密封锥面采用堆焊EDCr-B-15等硬质合金，使得密封面耐磨损，使用寿命长，可连续启闭10000次以上而无损伤。

5. 进口双向焊接蝶阀通过选用国际一等材料使得阀门具有耐高温特征，耐腐蚀的性能。

6. 进口双向焊接蝶阀由于全部采用耐火材料，具有可靠的耐火性；

7. 进口双向焊接蝶阀三偏心结构使阀具有自锁功能，蝶板关到密封位置时立即实现自锁，不会发生蝶板关过位的故障；

8. 进口双向焊接蝶阀操作轻松自如，输出端转矩低，蝶板流线形设计，压力损失系数低，进口双向焊接蝶阀是节能产品；

9. 进口双向焊接蝶阀密封阀座可调节，有利于装配与维修；

10. 进口双向焊接蝶阀与管道的连接方式采用焊接连接，安装使用方便，即可手动，也可电动、气动，实现智能控制。

11. 进口双向焊接蝶阀即可关闭截断介质，也可以任意调节介质流量。

The main characteristics of bidirectional welded butterfly valves are compact structure, light weight, easy installation, low flow resistance, large flow capacity, avoiding the influence of high-temperature expansion, and easy operation. No connecting rods, bolts, etc. inside the body, reliable operation, and long service life. It can be installed at multiple workstations without being affected by the flow direction of the medium.

1. The imported bidirectional welded butterfly valve adopts a three eccentric structure, where the butterfly plate and valve seat instantly contact or detach, truly achieving zero wear and zero leakage;

2. Due to the sealing ring being completely embedded in the butterfly plate, the entire valve does not need to be removed during maintenance, making it easy to replace and greatly reducing maintenance costs;

3. The sealing ring of the bi-directional welded butterfly valve adopts a soft and hard layered stainless steel plate and a flexible graphite plate (graphite rubber plate, asbestos rubber plate, etc.) sealing surface, which gives it the dual advantages of metal hard sealing and elastic sealing, and has excellent sealing performance in both low and high temperature working conditions.

4. The sealing cone surface of the bi-directional welded butterfly valve seat is made of hard alloy such as EDCr-B-15, which makes the sealing surface wear-resistant and has a long service life. It can be opened and closed continuously for more than 10000 times without damage.

5. The bi-directional welding butterfly valve adopts international first-class materials to make the valve have high temperature resistance and corrosion resistance performance.

6. Bidirectional welded butterfly valves have reliable fire resistance due to their use of refractory materials;

7. The three eccentric structure of the bi-directional welded butterfly valve enables the valve to have self-locking function. When the butterfly plate is closed to the sealing position, it immediately realizes self-locking, and there will be no fault of the butterfly plate being closed too far;

8. The bi-directional welded butterfly valve is easy to operate with low output torque, streamlined butterfly plate design, low pressure loss coefficient, and imported bi-directional welded butterfly valves are energy-saving products;

9. The sealing valve seat of the bidirectional welded butterfly valve can be adjusted, which is conducive to assembly and maintenance;

10. The bi-directional welding butterfly valve is connected to the pipeline through welding, which is easy to install and use. It can be manually operated, electric, or pneumatic, achieving intelligent control.

11. The bi-directional welding butterfly valve can close the cut-off medium and can also adjust the medium flow rate freely.