Flexible metal vacuum hose is a flexible connection pipe widely used in modern industrial pipelines. Metal hose is also called stainless steel hose, soft connection or metal soft connection. The flexible metal vacuum hose is mainly composed of a flexible body (bellows), a mesh body and various forms of joints. Its inner tube is a spiral or annular thin-walled stainless steel bellows, and the outer mesh of the bellows is made of Stainless steel wire, steel wire braided belt or steel belt is braided according to certain parameters, and the joints at both ends of the hose can be equipped according to the joint form of the user's pipeline or equipment.

　　Selection of flexible metal vacuum hose:

　　1. Flexible metal vacuum hose size: hose nominal diameter, joint form and size, hose length.

　　2. Pressure: the actual working pressure of the hose, the selected nominal pressure PN working pressure P.

　　3. Flexible metal vacuum hose medium: The chemical properties of the medium input in the hose determine the material of each part of the hose according to the corrosion resistance table.

　　4. Temperature: The working temperature and range of the medium in the hose; the ambient temperature when the hose is working. When the temperature is high, it is necessary to correct the number according to the temperature to determine the maximum pressure allowed under the working temperature to determine the correct pressure level.

　　5. The state of the flexible metal vacuum hose: According to the state of the hose when the hose is in use, refer to the correct installation method of the hose, the length calculation of the various motion states of the hose and the minimum bending radius of the hose, etc., correctly select the length of the hose, and Install correctly.