This dismantling joint uses an O-ring for sealing. Compared to our standard Type A gasket design, this version allows the installation length to be adjusted by tightening bolts and nuts, which moves the long body within the short body.
This eliminates the need for manual adjustment of the length, making it especially practical for large-size installations or situations with limited manpower.

However, since this design uses an O-ring for sealing and relies on bolt tightening to adjust the length, the body must be made of ductile iron rather than carbon steel. This is because during the tightening process, the surface coating is more likely to peel off, and without the protective coating, carbon steel is prone to rust.