一、进口焊接蝶阀概述

进口焊接蝶阀，Butt welding Butterfly valve，也叫焊接式蝶阀，焊接硬密封蝶阀，供热焊接蝶阀，供暖管网焊接蝶阀，热水管线焊接蝶阀，长输管线焊接蝶阀，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的蝶阀。

Welded butterfly valve  is precision welded J-shaped flexible ring and three eccentric multi-level metal seal structure, using the butt connection, widely used in medium temperature of ≤ 425 ℃ metallurgy, electric power, petrochemical, as well as drainage and municipal construction and other industrial pipe for regulating the flow and use of the butterfly set off fluid

美国威盾VTON焊接蝶阀分为铸钢焊接蝶阀，不锈钢焊接蝶阀，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，进口焊接蝶阀有双向密封功能。

二、进口焊接蝶阀参数指标

口径：DN15-2000

压力:PN16PN25PN40

温度：425℃

介质：水、热水，蒸汽

连接方式：焊接（对焊）

材质：碳钢，不锈钢，铬钼钢 

用途：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

三、进口焊接蝶阀特征

进口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，进口焊接蝶阀是节能产品；

9. 进口焊接蝶阀密封阀座可调节，有利于装配与维修；

10. 进口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 features of imported 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 welded butterfly valve adopts a three eccentric structure, and the butterfly plate and valve seat instantly contact or detach, truly achieving zero wear and zero leakage;

2. Imported welded butterfly valves, due to the sealing ring being completely embedded in the butterfly plate, do not need to remove the entire valve during maintenance, making replacement convenient and greatly reducing maintenance costs;

3. The sealing ring of the imported welded butterfly valve adopts a soft and hard laminated 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 imported 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. Imported welded butterfly valves have high temperature resistance and corrosion resistance properties by selecting international first-class materials.

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

7. The three eccentric structure of the imported welded butterfly valve enables the valve to have a 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. Imported welded butterfly valves are easy to operate with low output torque, streamlined butterfly plate design, and low pressure loss coefficient. Imported welded butterfly valves are energy-saving products;

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

10. The connection method between imported welded butterfly valves and pipelines adopts welding connection, which is easy to install and use. It can be manual, electric, or pneumatic, achieving intelligent control.

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