Duct sealing bag (pipe sealing balloon price) inflatable rubber plug (cheap) use should note the following one, first check whether the connection tight fitting, pressure gauge pointer is pointing to zero, pipe sealing balloon Whether swinging properly inflated, and if found to have abnormal pressure gauge pointer swing, should be replaced with new gauges, the accessories and the balloon connected, first of all in the open state to inflate the airbag test, test inflation pressure must not exceed 0.01mpa, Check the connections with soapy water balloon and fittings for leaks. Second, prior to use, you should check the basic conditions within the pipe, the pipe should be checked for the new pipe wall is smooth, whether there is mud, whether precipitation projections whether the pipeline for the old slag cement sludge, broken glass, sharp solid material, etc., pipeline cleaning is not clean will cause blocking effect is reduced, resulting in local water leakage, especially when used in cast iron pipes and cement pipes should pay special attention to prevent the airbag inflated balloon punctured pipe sealing. Third, the pipe sealing balloon debris in the pipe has the status of the pipeline is not a good judge of when water operations, in addition to cleaning up the pipe, then the balloon surface plus a protective response, such as surface put a canvas cover, or not low to 4 mm rubber pad wrapped balloon plus one, otherwise, the airbag can easily be punctured in some underwater debris. Fourth, the plugging operation in sewage pipes, the pipe sealing bag at the time the pipeline operation should be shortened, preferably not more than 12 hours, often contain chemical wastewater typically some organic or inorganic solvent, a long soak or the balloon surface corrosion emulsifying conjunctiva reduce its strength, friction is reduced, the impact of block construction. Five pipe sealing bag into the pipeline should be placed parallel to avoid curl, fold after inflation, to prevent the air bag when not open resulting in partial pressure is too large, balloon discontinuity, the instantaneous burst causing partial pressurization . Six, inflatable pneumatic equipment should be slow-charged, supercharged and in stages, pressure for some time, should be spaced a few minutes to adapt to changes in air pressure inside the balloon, and when used for less than the diameter DN600, the best using small or micro inflatable device to inflate the airbag, to such apparatus with large inflatable airbag inflator is not easy to grasp the speed of the inflator, the airbag will cause the chain structure in the absence of internal elastic stretch further moment when it is destroyed leading to rupture . Seven, the main role is to seal the pipe sealing balloon effect, when faced with pressure slightly larger than the inflation pressure of the pipeline deal with airbag artificial reinforcement measures, measures include: an airbag in the front airbag should shutoff back to put some sandbags to prevent the balloon move two in the pipeline, made with wooden bars cross shore pipe wall erected to prevent the airbag slide. 3, when the airbag reverse shutoff applications like architectural grille mesh wrapped around the balloon string bag like to live with a rope made of re-construction department. Eight, when the pressure inside the pipe sealing balloon drop pressure gauge pointer will decline, should promptly fill pressure.