1) The fault caused by the packing is caused by the problem caused by the packing, which is specifically manifested in the increase of external leakage, the increase of friction force or the jumping of the valve stem. The main reasons are as follows: First, it may be that the filler material is not suitable. If it is not suitable for PTFE filler under high temperature application environment, the seasoning should be replaced; Second, the packing is not properly installed. For example, installing graphite packing in a spiral way will cause uneven packing pressure; Third, the packing design cannot afford to be too large, for example, the height of the installation position is not clear, so it is better to install according to the instructions; Fourth, there are sundries in the packing, which cause the valve stem to scratch. What we need to do is to remove the sundries. 　　　　

First of all, we need to know that such an industrial production period is a new type of machine, and its functions and technologies are the most developed at present, so its technical ability in the whole industry can indeed be regarded as very advanced. In addition, we should also know that the coupling diaphragm pump is called the starting machine because it uses a compression machine as the power. In some flammable and explosive environments in industrial production, the use of such a machine will greatly reduce production costs. And now that industrial production has been combined with green production, it is natural to hope that more professional cleaner production machines will be used throughout the production process.