1. For metal corrugated expansion joint

Armoured bellows are widely used in various pipeline systems to compensate axial, lateral and angular displacement caused by temperature and pressure fluctuations. The core component of the armored bellows is the bellows, which can carry out pumping, lateral and angular displacement through the deformability and pressure resistance of the bellows, and bear the fluid pressure of the system. Other components are structural components, which play the role of guiding, supporting, connecting, guiding, etc. According to the design and use requirements, the bellows and related structural parts are welded into different types of bellows expansion joints in the axial, transverse and angular directions according to the required structure. It is widely used in petrochemical industry, high-voltage power transmission and transformation industry, energy, marine, aerospace and other fields.

2. Flexible connection for armored bellows

The armored bellows is used to compensate the position deviation caused by installation in the pipeline system, meet the requirements of the directional displacement of the working end, and bear the fluid pressure of the system. The core part of the armored bellows is the bellows. The ratio of the length to the inner diameter of the bellows is generally greater than 3. The types of waves are divided into annular and spiral. In order to increase the bearing capacity of the armored bellows, in many cases, the metal wire or braided metal mesh sleeve is armored outside the bellows.

3. For valve sealing isolation element

The bellows valve includes a stop valve and a throttle valve, which is used as a packless sealing isolation element of the valve stem. During the operation of the valve, the bellows and the valve rod carry out axial displacement and reset together, and at the same time bear the pressure of the fluid and absolute sealing. The main performance of the bellows is pressure resistance, working displacement and fatigue life. The failure modes of bellows include fatigue failure, stress corrosion failure and bellows instability. The bellows valve has higher reliability and service life than the packing seal valve. It has been widely used in nuclear industry, petroleum, chemical industry, medicine, aerospace and other industrial fields.

4. Used for armored bellows as heat exchange element

Armored bellows is a kind of highly efficient and strengthened heat exchanger, which is the product of metal forming, mechanics and heat transfer. As a heat exchange tube bundle, bellows mainly plays the role of strengthening heat transfer, and also plays the role of heat compensation and vibration resistance. The failure modes of bellows include fatigue fracture, stress corrosion fracture and corrosion fracture.

5. Elastic sensitive element for instrument

As an elastic sensitive element, bellows has high requirements for its elastic performance. As an elastic sensing element, bellows mainly converts pressure into displacement output or pressure into concentrated force output. The bellows that converts pressure into concentrated force output has little or no displacement, so the stress generated on the bellows is less than the stress on the bellows that outputs displacement.