The valve is mainly composed of main valve 1, regulating valve 2 and filter 3. In industry, mining, enterprises and high-rise buildings, the water supply and drainage system directly by pumps has four functions: globe valve, check valve, electric valve and water hammer eliminator. Especially suitable for supporting automatic water-lifting control system, without electric controller and external power, according to conventional automatic start-up and shut-down, with fast-closing, slow-closing and energy-absorbing chamber three functions of preventing and eliminating water hammer, can effectively improve the safety and reliability of the system. It meets the requirement of automation control of system engineering equipment.