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原文
Bellows valves commonly used materials introduced Transfer the metal bellows valve, bellows valve stem and valve body components in the process fluid that can be provided between the axial movement of the metal shell to form a dynamic seal. Bellows in the valve stem to withstand compression and stretching at the same time withstand the media pressure, temperature and corrosion, ensure that the valve in the life cycle to achieve zero leakage. With the bellows in the valve industry in general applications, the technical requirements of the bellows is also rising. Valve with a metal bellows to keep the high pressure, high temperature, corrosion resistance and long life direction. Suitable for the production of bellows material must have good ductility, high elastic limit, tensile strength and fatigue strength, good welding performance, stable elastic properties. Austenitic stainless steel due to have these properties, are widely used in the manufacture bellows. High pressure valves and pressure bellows is a basic requirement, but with the valve pressure rating increases, increased wall thickness and stiffness of the bellows to increase, to open the valve and the bellows are made ??more difficult. Bellows manufacturers generally do not simply increase in wall thickness, but the method by increasing the number of layers to improve the product resistant to stress, while reducing the bellows axial stiffness, reducing the valve opening force. Nominal 15Mea (9001b) the following austenitic stainless steel corrugated pipe wall thickness is generally 0.1-0.3mm, layers 1-6. The bellows pressure level under a certain versatility, has formed a series of products. When the pressure reaches 25MPa (1 5001b) above, according to the valve diameter and select the appropriate operating temperature of the material], from the professional manufacturer of bellows design and production. Excellent corrosion resistance of non-metallic materials, fluorine plastic widely used corrosion Valve, PTFE bellows valves also have some applications. But the non-metallic material strength and heat resistance are low, generally no more than temperature 150 ~ C, H] range of applications is limited. To 304,316 L austenitic stainless steel can be represented by a weak response to corrosive conditions, such as chlor-alkali industry, but to fight against the erosion of wet chlorine and other harsh corrosive conditions, the excellent corrosion resistance must be corrosion-resistant alloy material.
原文来自：http://www.ballvalve.org.cn

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译文：
调在金属波纹管阀门中，金属波纹管组件在阀杆与阀体内的工艺流体之间提供了可轴向移动的金属壳体，形成动密封。波纹管在承受阀杆的压缩与拉伸的同时承受介质的压力、温度和腐蚀，确保阀门在寿命周期内实现零泄漏。随着波纹管在阀门行业的普遍应用，对波纹管的技术要求也不断提高。阀门用金属波纹管不断向耐高压、耐高温、耐腐蚀和长寿命方向发展。适于生产波纹管的材料必须具有良好的塑性、高的弹性极限、抗拉强度和疲劳强度，良好的焊接性能，稳定的弹性性能。奥氏体不锈钢因具有这些性能特点，被广泛用于制造波纹管。耐高压耐压是对阀门及波纹管的基本要求，但随着阀门压力等级的升高，波纹管壁厚增加和刚度加大，给阀门开启及波纹管制造都增加了难度。波纹管生产厂家一般不单纯增加壁厚，而是通过增加层数的方法提高产品耐压力，同时降低了波纹管的轴向刚度，减小阀门开启力。公称压力 15Mea(9001b)以下的奥氏体不锈钢材料波纹管壁厚范围一般为0．1—0．3mm，层数1—6层。该压力等级下的波纹管具有一定通用性，已形成系列产品。当压力达到25MPa(1 5001b)以上时，要根据阀门口径和工作温度选择合适的材料】，由波纹管专业生产厂家设计生产。非金属材料耐腐蚀性能优良，衬氟塑防腐阀门应用广泛，四氟波纹管阀门也有一定的应用领域。但因非金属材料强度和耐热性都较低，一般使用温度不超过150~C，应用范围受到限制H】。以304、316L为代表的奥氏体不锈钢可以应对腐蚀性较弱的工况，但要对抗例如氯碱行业的湿氯腐蚀以及其他苛刻腐蚀性工况时，必须采用耐腐蚀性能优良的耐腐蚀合金材料。

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