The nitrogen booster is a compressor used to pressurize nitrogen and deliver or store it. The nitrogen booster of ‘Zhongsu Hengda’ can be divided into low pressure oil-free nitrogen booster and high pressure oil-free nitrogen booster, and the pressure is customized according to customer needs. It is mainly used for the pressurization and filling of nitrogen cylinders, and the nitrogen pressure test and leakage measurement of pipelines. The maximum filling pressure can reach 40MPA, according to the cooling method is divided into air cooling and water cooling, according to the compression stage is divided into three and four levels of compression. Completely oil-free lubrication, avoiding the possibility of oil contact with high pressure and high purity nitrogen, ensuring nitrogen pollution, the compressor inlet and outlet nitrogen purity is the same.