In order to control costs and reduce pollution, many manufacturers are equipped with more advanced production equipment to improve production efficiency. Water-sealing vacuum pumps are widely used in the paper industry. In the paper production process, water-sealing vacuum pump remove the water and other substances in the pulp to improve the quality of the paper.It draws out impurities carried in the liquid through the water-sealing pump under the gas-water separator, this process also greatly improves the production efficiency of the product. It is not easy to produce scale and other phenomena, and the effect of water saving and energy saving is obvious. The application effect of water-sealing is very significant. It promotes the development of the entire paper industry, meanwhile reduces the production cost.