原文：
         蝶阀(butterflyvalve)是指关闭件(阀瓣或蝶板)为圆盘，围绕阀轴旋转来达到开启与关闭的一种阀，在管道上主要起切断和节流用。蝶阀启闭件是一个圆盘形的蝶板，在阀体内绕其自身的轴线旋转，从而达到启闭或调节的目的。蝶阀全开到全关通常是小于90°，蝶阀和蝶杆本身没有自锁能力，为了蝶板的定位，柱塞阀要在阀杆上加装蜗轮减速器。采用蜗轮减速器，不仅可以使蝶板具有自锁能力，使蝶板停止在任意位置上，还能改善阀门的操作性能。 工业专用蝶阀的特点能耐高温，止回阀适用压力范围也较高，阀门公称通径大，阀体采用碳钢制造，阀板的密封圈采用金属环代替橡胶环。大型高温蝶阀采用钢板焊接制造，主要用于高温介质的烟风道和煤气管道。

           蝶阀的优点如下： 1、启闭方便迅速、省力、流体阻力小，可以经常操作。 2、结构简单，体积小，旋塞阀重量轻。 3、可以运送泥浆，排泥阀在管道口积存液体最少。 4、低压下，可以实现良好的密封。 5、调节性能好。

          蝶阀的缺点如下： 1、使用压力和工作温度范围小。 2、密封性较差。 蝶阀按结构形式可分为偏置板式、氧气专用阀垂直板式、斜板式和杠杆式。按密封形式可分为较密封型和硬密封型两种。

         软密封型一般采用橡胶环密封，硬密封型通常采用金属环密封。 按连接型式可分为法兰连接和对夹式连接；按传动方式可分为手动、齿轮传动、气动、液动和电动几种。 蝶阀的安装与维护应注意以下事项： 1、在安装时，阀瓣要停在关闭的位置上。 2、开启位置应按蝶板的旋转角度来确定。 3、带有旁通阀的蝶阀，开启前应先打开旁通阀。 4、应按制造厂的安装说明书进行安装，重量大的蝶阀，应设置牢固的基础。

“ Performance Xiangjie: butterfly characteristics and use description ”是由中国蝶阀网提供的阀门新闻，译文仅供参考。另外，中国蝶阀网还提供相关产品搜索： 衬胶蝶阀 、 金属密封（硬密封）蝶阀、 通风蝶阀 、 陶瓷蝶阀 、 更多蝶阀产品、 蝶阀价格 等。

译文：
          Butterfly (butterflyvalve) is shut down parts (valve flap or disc) to disk, around the valve axis to achieve the opening and closing a valve in the pipe and the throttle cut off from the main use. Butterfly valve open and close a disk-shaped pieces of the disc, the valve body rotating around its own axis, so as to achieve the purpose of hoisting or regulation. Butterfly valve fully open to fully closed is often less than 90 °, butterfly valves and butterfly bar itself is not self-locking capability, Plug Valvesin order to position the disc to install the valve stem worm reducer. With worm reducer, not only to make the disc has a self-locking capability, so the disc to stop at any position, but also to improve the operability of the valve. Industry-specific characteristics of butterfly valves to high temperature and higher applied pressure range, the valve nominal diameter large body with carbon steel, valve plate to replace rubber seal ring with metal ring. Large butterfly valve with high temperature of steel plate, mainly for high-temperature medium Flue andReducing Valves gas pipelines. Butterfly advantages are as follows: 1, hoist easy fast and labor, fluid resistance is small, you can always operate. 2, simple structure, small size Safety valves and light weight. 3, can carry mud accumulation of fluid in the pipe outlet at least. 4, low pressure, can achieve a good seal. 5, regulated performance. Butterfly valve defects are as follows: 1, using the small range of pressure and temperature. 2, poor sealing. Butterfly form of the structure can be divided into bias plate, vertical plate, inclined plate and the lever type. By sealing the form can be divided into relatively closed and hard Sealed type two. Soft sealing type generally use the rubber ring seal, seal type Balance Valvescommonly used metal ring seal. By connection type can be divided into flange and clamp connections; press can be divided into manual transmission, gear transmission, pneumatic, hydraulic and electrical power of several. Butterfly valve installation and maintenance should note the following: 1, the installation disc to stop in the closed position. 2, the open position should beAPI Cast Steel Valvesthe disc to determine the rotation angle. 3, with a bypass valve of the valve, open the bypass valve opening preceded. 4, shall be manufacturer's installation instructions to install it, the weight of a large butterfly, should set a solid foundation.

原文来源：http://www.1diefa.com/

2010-07-28 06:54

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