It’s sure the growth of control valves is closely related to the industrial procedure. It is true that in early times, people have come up with the concept of regulating. People attempt to regulate the flow of water from rivers or streams by using big stones or tree trunks to block the circulation of water or even change water flow management at that time. And there are a number of simple original valves utilized for crop irrigation from Greek and Egyptian civilization. Later, Romans made a complex water system for crop irrigation and properly used plug and plunger valves to prevent the reflux. Subsequently the Industrial Revolution has proposed the development to a new stage. James Watt invented the first rate controller adjustment. People at the time tended to cover extra attention to the law of flow.
A pump , as the fist controller Kp-LOK valve, was first invented by William Fisher at 1880. This really is a sort of self-control valve having a heavy hammer. When the pressure rises, the valve gap decreases under the consequence of this heavy hammer as a way to reach a stable pressure. During the 1920s, ball valves are the hottest ones, along with single-port and double-ported globe valves with V-notch. As it was 1940s, diaphragm valves and butterfly valves came into being to restrain the mass stream. The valve positioner originated then. During the 1950s, three-way valves and cage valves were performed outside to meet high requirements. In 1970 s, cage valves, especially the eccentric plug valves were widely popular in many areas in industrial procedure. When stepping to the 21st century, the Field bus control valve has been applied. And it’s sure the requirement of the control valves would be higher in the future.
Control valves and also the growth of KP-LOK industrial procedures developed simultaneously. To increase the control quality, it is certain to take exact requirements on control system and the makeup of their constituent parts. As the whole society maintains a quick pace, it’s necessary to know the advanced technologies and employ them into training. It’s clear to build up all the time. Otherwise, the entire industry, although the whole society would not progress.