The water ring vacuum pump is a kind of vacuum pump with a relatively simple structure. It uses water as the working fluid to achieve the function of sealing and circulating power. This water ring pump is easy to use and maintain, and the gas is isothermally compressed. In addition to containing dust, water vapor and other characteristics.

Water ring vacuum pump has become the most widely used vacuum obtaining equipment in chemical, food, pharmaceutical, coal mine, light industry, papermaking, metallurgy, mining, power generation, food and waste gas recycling and other industries, especially in the simulation of aviation and aerospace industries. The operation is safe and stable during the test.

At present, the gas volume of a single water ring vacuum unit is over 70,000m3/h, and the power is over 1,700kW. In recent years, with the development of the country's demand for vacuum obtaining equipment, the water ring vacuum pump is developing in the direction of large-scale, complete set, high vacuum and large pumping capacity. For example, the 2BE type water ring vacuum pump is used in lost foam and V method casting in the foundry industry, which requires a large amount of air extraction. The commonly used models are 2BE253 or 2BE252 series.

The water ring vacuum pump has developed into a mature and general mechanical equipment necessary for the development of various industries, but there are few studies on the actual energy efficiency value of the water ring vacuum pump (including the water ring compressor).