Large door and hatch gaps are sealed. These doors typically have a larger circumference, and due to the influence of processing and assembly precision, or changes in environmental temperature causing thermal expansion and contraction deformation, the gaps to be sealed may vary or become inconsistent. The variation range is generally between 3-5mm or more. Standard sealing strips are insufficient to achieve ideal sealing effects. In such cases, a sealing product that can change with the gap is required; the inflatable sealing ring is a new type of sealing technology developed to meet this sealing requirement. Frequently opened and closed pipe ends and valves, particularly in dust pipelines in the power and chemical industries, require regular opening and cleaning before being closed. These pipes are usually over ￠300mm in diameter, and using flange covers with standard sealing gaskets and bolts to secure them adds significant maintenance time and installation difficulty. Using an inflatable sealing ring resolves all these issues, as it can be secured with minimal bolts or without bolts, simply using clips. Automated filling of plastic bags for powdered food products. A充气密封圈 is installed at the filling port, and after the plastic bag is placed, the sealing ring inflates to tighten the bag. After filling, the air is released, and the plastic bag automatically detaches, significantly improving filling efficiency.