大口径三偏心蝶阀介绍

大口径蝶阀厂家北方阀门集团技术部整理，三偏心大口径蝶阀从发明到现在已经有50多年的历史了，在这50多年中，人们也在不断地对三偏心大口径蝶阀进行改良，这也使得三偏心大口径蝶阀的应用领域变得更宽广。原来三偏心大口径蝶阀只用于水介质的截断和联通，三偏心的设计增强大口径蝶阀的功能，已经成为工业工业管道设备中，关键工艺环境最恶劣的条件下性能卓越的大口径阀门之一。

The triple-eccentric large-diameter butterfly valve has a history of more than 50 years since its invention. In the past 50 years, people are constantly improving the triple-eccentric large-diameter butterfly valve, which also makes the application of the triple-eccentric large-diameter butterfly valve. The field becomes wider. The original triple-eccentric large-diameter butterfly valve is only used for the cut-off and communication of water medium. The triple-eccentric design enhances the function of the large-diameter butterfly valve, and has become a large-diameter valve with excellent performance in the most severe conditions of the key process environment in industrial industrial pipeline equipment. one.

三偏心大口径蝶阀，正如其名称所指，三个独立的偏移被设计成了大口径阀门。具体是指：

1）盘/阀座密封面的中心线，

2）轴相对于孔的中心线的位置；

3）从阀孔的中心线偏移的阀座锥角的轴线。

这三个偏移的组合提供了一个锥形的密封面，最大限度地减少三偏心大口径蝶阀阀座和密封件之间的磨损，提高三偏心大口径蝶阀的使用寿命和密封性。此外，把优阀座面降低到最小，降低三偏心大口径蝶阀的工作转矩。

Triple Offset Large Diameter Butterfly Valves, as the name suggests, three independent offsets are designed to be large diameter valves. Specifically:

1) The centerline of the disc/seat sealing surface,

2) The position of the shaft relative to the centerline of the hole;

3) The axis of the seat cone angle offset from the centerline of the valve bore.

The combination of these three offsets provides a conical sealing surface that minimizes wear between the seat and the seal, improving the service life and tightness of the butterfly valve. In addition, the optimal valve seat surface is reduced to a minimum, and the working torque of the triple eccentric large-diameter butterfly valve is reduced.

一般来说，由于三偏心大口径蝶阀密封特性以及成本比其他金属阀座大口径阀门类型选择更有优越性。由于结构紧凑，回转的设计和轻质结构，可以安装和操作方便，他们不需要管支撑。可更换的密封环，允许快速和简单的维修和低扭矩（允许较小的驱动器）意味着更节省成本。

双向零泄漏封闭的金属座只有一次软阀座大口径阀门。这将极大地扩展应用的可能性。灵活的密封环和最佳的扭矩传输，这意味着这些大口径阀门可以提供消防安全设计和密封性能，可以大于一般大口径蝶阀设计的最大温度范围。 传统上，可能会发现在众多行业生成石油和天然气加工、炼油、化工和石化厂、发电、海上平台、供热、造纸、钢米尔斯、糖米尔斯、海水淡化、水处理和分配。他们在所有行业中的使用增加了严格的政府法规和更大的生产需求迫使用户寻求解决方案。用量也节节攀升，已经存在了数十年，特点提供了许多好的解决方案，包括那些具有更大的挑战。这些好处包括运营效率，耐磨料介质和化学品到一定的温度或压力，并在众多的操作条件的多功能性。

Generally speaking, due to the sealing characteristics and cost of the triple eccentric large-diameter valve, the butterfly valve is more advantageous than other metal-seat large-diameter valve types. Due to their compact, swivel design and lightweight construction, they can be easily installed and operated, and they do not require tube support. Replaceable seal rings, allowing quick and easy repairs and low torque (allowing for smaller drives) mean more cost savings.

Two-way zero-leakage closed metal seat only has a soft seat large-diameter valve. This will greatly expand the application possibilities. Flexible sealing rings and optimal torque transmission mean that these large diameter valves can provide fire safety design and sealing performance that can be larger than the maximum temperature range of general large diameter butterfly valve designs. Traditionally, it may be found in numerous industries generating oil and gas processing, refining, chemical and petrochemical plants, power generation, offshore platforms, heating, paper, steel mills, sugar mills, desalination, water treatment and distribution. Their use in all industries has increased stringent government regulations and greater production demands forcing users to seek solutions. Usage is also climbing, and features have been around for decades, offering many good solutions, including those with greater challenges. These benefits include operational efficiency, wear media and chemicals to a certain temperature or pressure, and versatility in numerous operating conditions.

利用设计的特点，下一代设计提供的功能，进一步提高三偏心大口径蝶阀的安全性和性能，-包括：

1、采用精密机加工的密封面和密封环形成金属对金属密封。即使在高温高压以及其他的严苛的服务环境，都可以做到双向密封零泄漏。低摩擦和流线形的标准标准直角圆锥设计，金属对金属能很好的解决热胀冷缩，是在高温高压环境服务的重要特征。金属对金属密封允许应用在有防火要求的油田中。

2、最佳的阀座密封面设计，阀座密封面采用在大口径阀门本体上堆焊司太立硬质合金，使用密封面有更长的寿命和更好的耐磨性，即使反复循环使用。这种密封结构设计减少了和蝶板的摩擦，减少了工作扭矩。

3、特殊的阀座设计使用大口径阀门可以自动调整大口径阀门的密封。浮动的密封环和一个宽的密封环支撑垫片，使用密封性和启闭更加可靠。这种阀座确保大口径阀门有双向密封特性。

4、大口径阀门的设计的定位销在蝶板很低的位置，允许在热膨胀时都有良好的性能，最大程度的减小阀杆的扰度。因此，大口径阀门有很长的使用寿命。

Taking advantage of the design features, the next generation design offers features that further enhance the safety and performance of triple offset large diameter butterfly valves, including:

1. Using precision machined sealing surface and sealing ring to form metal-to-metal seal. Even in high temperature and high pressure and other harsh service environments, two-way sealing and zero leakage can be achieved. Standard standard right-angle cone design with low friction and streamline shape, metal-to-metal can well solve thermal expansion and contraction, which is an important feature of service in high temperature and high pressure environment. Metal-to-metal sealing allows applications in oil fields where fire protection is required.

2. The best valve seat sealing surface design, the valve seat sealing surface is made of stellite hard alloy surfacing on the large-diameter valve body, the use of the sealing surface has a longer life and better wear resistance, even if repeated cycles use. This sealing structure design reduces the friction with the disc and reduces the working torque.

3. The special valve seat design can automatically adjust the sealing of large-diameter valves by using large-diameter valves. The floating seal ring and a wide seal ring support gasket make the use of tightness and opening and closing more reliable. This seat ensures bi-directional sealing for large diameter valves.

4. The large-diameter valve is designed with a positioning pin at a very low position on the disc, which allows good performance during thermal expansion and minimizes the disturbance of the valve stem. Therefore, large-diameter valves have a long service life.