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Sealing principle of metal spiral wound gasket

Jul 15, 2020

The winding part of the metal winding gasket is formed by cross-winding the filling material and the shaped metal tape. During the pre-tensioning, the filling material is compressed and squeezed out, filling the unevenness on the contact surface with the flange Deformation and other defects have established a seal that can block the media leakage channel.

When the metal spiral wound gasket is subjected to fluid pressure in the working state, the elastic effect of the compressed steel belt in the spiral part and the rebound of the filling material can release enough elastic strain to compensate for the separation of the flange surface after compression and compensate for long-term operation. During the process, due to thermal cycling, pressure fluctuations and thermal creep caused by the relaxation of fastener stress.