这篇文章都是关于阀门生产厂家的，以及各种类型的阀门和配件的可用。阀门是机械或机电装置，用于控制液体、气体、粉末等通过管道或管道，或从罐体或其他容器中的运动。在大多数情况下，阀门释放某种形式的机械屏障--例如，一个板、一个球、一个隔膜--它们可以插入并从经过的物质的流动流中移除。一些阀门被设计为开关品种，而另一些则允许对介质的通过进行非常精细的控制。

　　This article is all about valves, and the various types of valves and fittings available. Valves are mechanical or electro-mechanical devices that are used to control the movement of liquids, gases, powders, etc. through pipes or tubes, or from tanks or other containers. In most instances, valves rely on some form of mechanical barrier—a plate, a ball, a diaphragm, for example—that can be inserted and removed from the flow stream of the material passing by. Some valves are designed as on-off varieties, while others allow very fine control of the passage of media.

　　盲阀，或线盲阀，是用来阻止流过管道的机械装置。它们主要被石油和天然气工业用作隔离管道的一种手段。这个阀门也被称为管道百叶窗。主要规格包括阀门类型，执行器类型，端口连接，阀门尺寸，以及阀体的材料，阀座，密封和衬里。盲阀是常见的船舶和海上平台。它们提供一个可见的、立即的指示，说明管道是打开的还是关闭的，并用于隔离管道的各个部分以便于维护。

　　Blind Valves, or line blind valves, are mechanical devices used to stop flow through a pipeline. They are used primarily by the oil and gas industries as a means of isolating sections of a pipeline. Thes valves are also known as Piping Blinds. Key specifications include valve type, actuator type, port connections, valve size, as well as the material of the valve body, its seat, seal, and lining. Blind valves are common on ships and offshore platforms. They provide a visible, immediate indication as to whether a pipe is open or closed and are used to isolate portions of a pipeline to allow maintenance.

　　蝶阀是四分之一转向阀，采用安装的圆形瓣，进入和流出的流动流。关键规格包括端口连接，阀门大小，以及组成阀体、阀座、密封、阀瓣和阀杆填料的材料。多用于废水处理厂、发电厂和用于关闭和调节及隔离的过程。尤其是在大口径管道中受到欢迎。蝶阀通常比相同容量的球阀更小、更便宜，很难在高压和高压下工作。它们也比球阀更容易漏水，而且会造成更高的头部损失.

　　Butterfly Valves are quarter-turn valves which employ center-mounted circular flaps that swing into, and out of, the flow stream. Key specifications include port connection, valve size, and the materials that make up the valve body, its seat, seal, disc, and stem packing. Butterfly valves are used in wastewater plants, power plants, and process plants for shut-off and for regulating and isolating service and are especially popular in very large diameter pipelines. Generally smaller and cheaper than a ball valve of the same capacity, butterfly valves can be difficult to operate against high pressure and flow. They are also more leak-prone than ball valves and subject to higher head losses.

　　以上就是一些阀门生产厂家的知识，希望对大家了解阀门有所帮助，同时欢迎大家实地考察。

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