History of the development of the control valve

Control valve is closely related to the development and the development of the industrial production process. Ancient times, people in order to regulate the water flow of rivers or streams, large rocks or tree trunks to prevent the flow of water or a change in the direction of the flow of water. Egyptian and Greek civilization invented several of the original type of valve used for crop irrigation. However, generally recognized as the ancient Romans for crop irrigation and developed quite complex water systems, the use of plug valves and piston valve and check valve to prevent water countercurrent. Renaissance, artists and inventors da Vinci (LeonardodaVinc), ditches, irrigation projects and other large-scale hydraulic system design project using the valve, and many of his technical solution is still real. The modern history of the valve industry in parallel with the industrial revolution, with the deepening of the industrial revolution, in 1705, the first industrial steam engine the Niu Kangman standard air cylinder
(ThomasNewcomen) invention, the operation of the steam engine control requirements, Watts (JamesWatt) invented the The first adjustment speed controller Subsequently, the control of the fluid flow more and more attention. The first control valve is manufactured in 1880 by the WilliamFisher pump regulator, which is a heavy hammer of Self-control valve, pressure valve, the control valve opening decreases under the heavy hammer, so as to achieve the stable pressure control effect.direct acting solenoid valves