It is specific that the improvement of control valves is closely connected to the industrial process. It is accurate that in ancient instances, folks have come up with the idea of regulating. Folks attempt to regulate the flow of water in rivers or streams by employing significant rocks or tree trunks to block the flow of water or alter water flow direction at that time. And even there are some easy original valves made use of for crop irrigation in Egyptian and Greek civilization. Afterwards, Romans developed a complex water system for crop irrigation and employed plug and plunger valves to avoid the reflux. Then the Industrial Revolution has proposed the development to a new stage. James Watt invented the 1st speed controller adjustment. People today at that time tended to spend additional consideration on the regulation of flow.

A pump governor, as the fist handle valve, was invented by William Fisher in 1880. This is a type of self-handle valve with a heavy hammer. When Air Release Valve , the valve opening decreases under the impact of the heavy hammer in order to accomplish a steady pressure. During the 1920s, ball valves are the most preferred ones, with each other with single-port and double-ported globe valves with V-notch. When it came to be 1940s, diaphragm valves and butterfly valves came into becoming to manage the mass flow. The valve positioner was developed then. In the course of the 1950s, three-way valves and cage valves have been carried out to meet high specifications. In 1970s, cage valves, especially the eccentric plug valves were well known in many fields in industrial method. And because 1980, a assortment of fine small handle valve, handle valve actuator are born aiming to reform the weight and height and circulation of valves. When stepping into the 21st century, Field bus handle valve has been applied. And it is specific that the requirement for the handle valves would be larger in the future.

Manage valves and the improvement of industrial processes developed simultaneously. To boost the control good quality, it is particular to take exact demands on handle program and all the composition of the constituent components. As the complete society keeps a speedy pace, it is required to grasp the advanced technologies and employ them into practice. It is clear to create all the time. Otherwise, the whole sector, even the whole society would not progress.