The History of Valve

    Valves are produced with the the production fluid pipeline. Human use valves for nearly 4000 years. Ancient Chinese absorbed salt water from the salt well, there was a cork valve used in the bamboo pipe. 1800 BC, ancient Egyptians built large-scale water conservancy project to prevent Nile flooding, had adopted a similar wooden cock to control flow distribution. These is the prototype of the valve. Large number of applications of industrial valves, is beginning until after Watt invented the steam engine.
    In the early twentieth century, appeared the valve of cast steel, forged steel and forge welding structures.