In metal bellows valve, metal bellows components in the valve stem and valve body between the process fluid provides the axial movement of metal shell, form a dynamic seal. Bellows under compression and stretching of the stem under medium pressure, temperature and corrosion at the same time, to ensure that the Industrial Valves in the life cycle to achieve zero leakage. With the common application of bellows in the valve industry, the technical requirements of corrugated pipe is also increasing. Valves with metal corrugated pipe resistance to high pressure, high temperature resistant, corrosion resistance and long life direction. Must be suitable for the production of corrugated pipe material has good plasticity and high elastic limit, tensile strength and fatigue strength, good welding performance, stability of elastic properties. Austenitic stainless steel for with these performance characteristics, widely used in the manufacture of bellows. Resistance to high pressure is the basic requirement of the valve and the bellows, but with the increase of valve pressure rating, corrugated pipe wall thickness and stiffness increased, to open valve and corrugated pipe manufacturing is more difficult. Corrugated pipe production factory is generally not simply increase the wall thickness, but by adding layer method to improve the product resistance to pressure, at the same time reduces the axial stiffness of the bellows, reducing valve opens. Nominal pressure mea (15 9001b) 1 - The layer number of 3 mm, 1 - 6 layers. The stress level of corrugated pipe has a certain generality, has formed a series of products. When the stress reaches 25 mpa ( 1 5001b) According to above valve diameter and working temperature to choose the appropriate material 】 By the specialized manufacturer of corrugated pipe design and production. Nonmetallic material excellent corrosion resistance, fluorine plastic anticorrosive valve widely used, ptfe bellows valves have some application field. But for nonmetallic material strength and heat resistance are low, generally use temperature not to exceed 150 ~ C, application range is restricted H 】 。 By 304, 316 l austenitic stainless steel can handle corrosive weaker condition, but in the fight against chlor-alkail industry such as wet chlorine corrosion and other harsh corrosive conditions, must adopt excellent corrosion resistance of the corrosion resistance of alloy material. In this paper, the keyword search: more Industrial Valves technical articles fitting valve product information
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