原文：
           蝶阀的蝶板安装于管道的直径方向。在蝶阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0＆#176；~90＆#176；之间，旋转到90＆#176；时，阀门则牌全开状态。蝶阀结构简单、体积小、重量轻，只由少数几个零件组成。呼吸阀而且只需旋转90＆#176；即可快速启闭，操作简单，同时该阀门具有良好的流体控制特性。 蝶阀处于完全开启位置时，蝶板厚度是介质流经阀体时唯一的阻力，因此调节阀通过该阀门所产生的压力降很小，故具有较好的流量控制特性。

       蝶阀有弹密封和金属的密封两种密封型式。弹性密封阀门，密封圈可以镶嵌在阀体上或附在蝶板周边。采用金属密封的阀门一般比弹性密封的阀门寿命长，但很难做到完全密封。金属密封能适应较高的工作温度，弹性密封则具有受温度限制的缺陷。如果要求蝶阀作为流量控制使用，锻钢阀门主要的是正确选择阀门的尺寸和类型。蝶阀的结构原理尤其适合制作大口径阀门。蝶阀不仅在石油、煤气、化工、水处理等一般工业上得到广泛应用，而且还应用于热电站的冷却水系统。

       常用针型阀的蝶阀有对夹式蝶阀和法兰式蝶阀两种。对夹式蝶阀是用双头螺栓将阀门连接在两管道法兰之间，减压阀法兰式蝶阀是阀门上带有法兰，用螺栓将阀门上两端法兰连接在管道法兰上。阀门的强度性能是指阀门承受介质压力的能力。阀门是承受内压的机械产品，因而必须具有足够的强度和刚度，以保证长期使用而不发生破裂或产生变形。

“ Teach you how to choose the right valve ”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 valve panels installed on the pipe diameter direction. Cylindrical channel in the valve body, disc-shaped disc around the axis of rotation, rotation angle between 0 ° 90 °, ° Suber-water pumpsrotation to 90, the valves are open all license conditions . Butterfly simple structure, small size, light weight, only by a few parts. But only rotated 90 ° to quickly open and close, easy, and the fluid control valve has good features. Butterfly valve is fully open position, Screw pumpsthe disc thickness is only when the medium flows through the body resistance, thus generated by the valve pressure drop is small, it has a better flow control characteristics. Butterfly valve with elastic metal seal and the seal of two seal types. Flexible sealed valves, seals can be mounted on the body or attached to the disc periphery. Metal sealed valves generally higher than the valve seal flexible, long life, but it is very difficult to completely seal. MetalSelf-priming pumps seal can adapt to high temperature, flexible seal is restricted by temperature, the defects have. If asked to use as a flow control valve,Magnetic pumps the main choice is the right size and type of valve. Butterfly valve structure principle is particularly suitable for production of large diameter valves. Butterfly not only in oil, gas, chemicals, water treatment, widely used in general industry, but also for the thermal power station cooling water system. Common butterfly valve wafer type butterfly valve and flange type butterfly valve two. WaferChemical pumps type butterfly valve is the valve stud connection between two pipe flanges, flange type butterfly valve is a valve with a flange with bolts on both ends of the valve in the pipe flange connection method Lan on. Strength properties of the valve is the valve the ability to withstand the pressure medium. Valve is subjected to inner pressure of mechanical products, and therefore must have sufficient strength and rigidity to ensure the long-term use without the risk of rupture or deformation.

原文来源：http://www.1diefa.com/

2010-09-01 07:47

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