Valve is one of the familiar equipment, so do you know the history of the valve?
Valve originated in China, it appeared more than two thousand years ago. Ancient China has used in the water pipe valve bamboo and cork, and later use in irrigation channels gate, use check valves in the smelting of the bellows, with the use of boilers, in 1681 and the emergence of lever type safety valve. The use of bamboo in the well salt mining and salt extraction plate check valves with the development of smelting technology and hydraulic machinery, copper and lead plug in europe.
- In the 1800 BC, the ancient Egyptians used similar wooden cocks to control the distribution of water while large-scale water conservancy was built to prevent the Nile from overflowing. These are the embryonic form of the valve. The extensive use of industrial valves began only after Watt invented the steam engine. In the early twentieth Century, cast steel, cast iron, forged steel and forged welded structural valves appeared.
- Then in Europe because of the development of smelting technology and water conservancy machinery, the requirements of the valve is gradually increased, and invented the copper and aluminum plug valve, the valve before entering the metal in 1769 Watt invented the steam engine so that the valve has officially entered the field of machinery industry, the steam engine uses a lot of plug valve, safety valve, check valve pneumatic butterfly valve.18 century to nineteenth Century, the steam engine in the mining industry, metallurgy, textile, machinery manufacturing and other industries rapid promotion, increasing the number and quality of the valve, so there is a slide valve. Threaded valve stem appeared and the wedge type gate valve with trapezoidal threaded valve stem, valve development is a major breakthrough in the emergence of these two types of valve not only meets the industry of valve pressure and temperature requirements of continuous improvement, and meet the initial requirements for flow regulation.
- Since then, the power, oil, chemical, shipbuilding industry, the rise of a variety of high and high pressure valves have been rapid development. After the Second World War, by a variety of special materials, including polymer materials, lubricating materials, development of stainless steel and cobalt based alloy, the old plug valves and butterfly valves to obtain a new application, according to the valve and the diaphragm valve plug valve changes rapidly. Cut-off valve, gate valve and other valve varieties increased, quality improved. The valve manufacturing industry has gradually become an important sector of the machinery industry.
