Corrugated pipe is introduced, 3)

but by increasing the layers of the methods to improve product pressure resistant, corrugated pipe production factory is generally not simply increase the wall thickness. At the same time reduces the axial stiffness of the bellows, decrease the pneumatic valve opening force. Mm layer number. The stress level of corrugated pipe has a certain generality, has formed a series of products. When pressure achieve MPab above, according to the pneumatic valve diameter and working temperature to choose the appropriate materials, manufactured by the specialized manufacturer of corrugated pipe design. Non-metallic materials excellent corrosion resistance, fluorine plastic anticorrosive pneumatic valve is widely used, four fluorine pneumatic valve bellows have some application field. But for non-metallic materials strength and heat resistance are low, generally use temperature not to exceed ~ C application range is restricted H represented by 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 condition, the necessary material with excellent corrosion resistance of the corrosion resistance of alloy.
metal corrugated pipe component in the pneumatic valve stem and valve body between the process fluid provides the axial movement of metal shell, metal corrugated pipe of pneumatic valves. Form a dynamic seal. Corrugated pipe in pneumatic compression and stretching of the stem at the same time accept the medium pressure, temperature and corrosion, to ensure that the pneumatic valve for zero leakage in life cycle.

to the technical requirement of the corrugated tube has been improved. Pneumatic valves with metal bellows from time to time to the resistance to high pressure, high temperature resistant, corrosion resistant and short-lived life direction. Suitable for the production of corrugated pipe materials must have good plasticity, high elastic limit, tensile strength and fatigue strength, with the common application of corrugated pipe in pneumatic valve industry. 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 pneumatic valves and corrugated pipe, but with the increase of pneumatic valve pressure rating, corrugated pipe wall thickness and stiffness increased, to the pneumatic valve opens and corrugated pipe manufacturing is more difficult.