pneumatic inflatable sewer drain pipeline stopper rubber airbag pipe plug

It is mainly used in the pouring and forming project of the pre-tensioned and post-tensioned beams of highway bridge concrete. It is also adopted by the culvert sewage project. The rubber airbag is a kind of expandable and shrinkable inner mold of different shapes made by vulcanizing the polymer properties of rubber and high-strength fiber cloth. After being filled with compressed air, the airbag stretches and expands to meet the design requirements of its cross-section. The inflation pressure and cross section shape can be customized by buyers. It can also be withdrawn from the cavity. It is easy to use, economical and durable, and can be reused many times. It is soft and can be shrinked folded and curled when not inflated. After inflation and expansion, it has enough strength to withstand the pressure of concrete. It is suitable for pumping holes in reinforced concrete components, including piles, roof truss, roof slab pillars, beams, construction projects, water conservancy projects (dock, slipway, wharf) and so on.