According to the American standard EJMA and national standard GB/T12777/99, the wave height, distance, thickness, layer number of bellows are designed and optimized by computer. Its profile has " U " type, " S " type, " C " type, " CU " type, " V " type and so on.

We can design and manufacture different bellows expansion joint in the light of different application condition.
The characteristic of the circular metal bellows which is manufactured by hydraulic pressure, is precision of geometry size, uniformity of the material forming, small attenuation, no damage and good surface quality, so its life is enhanced greatly.

According to the use conditions, we can design and manufacture the monolayer and the multilayer bellows whose characteristic is low rigidity value, small elastic reaction and long life.