With the advancement of vacuum applications, the variety of vacuum pumps has expanded significantly, with pumping speeds ranging from a mere fraction of a liter per second to hundreds of thousands or even millions of liters per second. As the required pressure range for vacuum technology applications in both industrial production and scientific research continues to broaden, it is often necessary to assemble a vacuum pumping system comprising multiple types of pumps working in tandem to meet the specific demands of these processes. Given the vast spectrum of operating pressures encountered across various vacuum application sectors, no single type of vacuum pump can effectively serve the entire pressure range; instead, different types of pumps must be selected based on the specific operating pressure ranges and functional requirements of each application. To ensure operational convenience and to satisfy the diverse needs of various vacuum-based processes, different types of vacuum pumps are frequently integrated into combined units-or pumping stations-tailored to specific performance specifications.
Commonly used vacuum pumps include dry screw pumps, liquid ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, Roots pumps, and diffusion pumps. These pumps constitute the indispensable core machinery supporting vacuum-based processes across virtually every sector of the national economy. In recent years, driven by the sustained rapid growth of my country's economy, the robust expansion of downstream industries utilizing vacuum technology, and the continuous diversification of vacuum application fields, my country's vacuum pump industry has achieved a trajectory of sustained, stable, and rapid development.