1、 The principle of negative pressure resistance
The inner lining of the PTFE lined metal hose is made of PTFE material, and the outer layer is a corrugated pipe with metal buckle edges. This design ensures that the PTFE lined metal hose has extremely high pressure resistance, as well as high elasticity, torsion resistance, and corrosion resistance. In the vacuum process, the pressure bearing area of the hose wall decreases, and negative pressure is formed inside the tube. Under the action of negative pressure, the PTFE lining material can withstand the suction force generated inside, thus achieving the effect of negative pressure resistance.
2、 Advantages of Negative Pressure Resistance
1. Strength and toughness: PTFE lined metal hoses themselves have strong and tough properties, can withstand large negative pressures, and are not easily damaged or destroyed during the suction process, making them safer and more reliable.
2. Corrosion resistance: In some special media transportation fields, an important advantage of PTFE lined metal hoses is their strong corrosion resistance. For example, when transporting strong corrosive media such as acid and alkali, they can be used for a long time without being corroded. Even after repeated bending and twisting, it will not affect the hose.
3. Good static sealing: PTFE lined metal hoses can ensure that the internal medium is not lost under suction conditions. The principle is that the corrugated pipe with buckled edges has good plastic deformation, and when subjected to tension, it will be clamped between the hose and the pipe joint, forming a good static sealing performance.
3、 Application Fields
PTFE lined metal hoses can be applied in various industries, such as chemical, pharmaceutical, food, power, textile, petroleum, and so on. The application of these industries involves the transportation of media, often encountering corrosion problems of lining materials, airtightness and safety issues under negative pressure. Therefore, PTFE lined metal hoses have been widely used, greatly promoting the development of the industry.
【 Conclusion 】
In short, PTFE lined metal hoses not only exhibit excellent pressure resistance, but also demonstrate good corrosion resistance and safety performance, which makes them widely used in various media transportation fields, bringing convenience and efficiency to industrial production.