Pneumatic valves and hydraulic pressure based on a certain air, water or oil as a power source, an air cylinder (or cylinders) and the movement of the piston to drive the valve, general pneumatic air pressure is less than 0.8MPa, hydraulic pressure or low oil pressure is 2.5MPa ~ 25MPa. As for driving the diaphragm; rotary gas, liquid drive means for driving the ball, butterfly or plug. The driving force of hydraulic devices, suitable for driving large diameter valves. Such as for driving plug, ball and butterfly valves Ltd. Guangzhou Kaiheng must convert the reciprocating motion of the piston surface rotary motion. In addition to the use of an air cylinder or a hydraulic cylinder piston to drive outside the valve, as well as the use of pneumatic diaphragm-driven, and the driving force is small because of the trip, it is mainly used to adjust the valve. Technical support production and development of the valve, the valve is not a valve behind domestic than foreign, on the contrary a lot of products in the technology and innovation and international companies have been able to match. Development of the domestic valve industry is to end the modern direction of the front row. Industrialization and urbanization, the reform and the four forces of globalization, driven by China's valve manufacturing equipment or broad prospects, the future of high-end valve industry, localization Shanghai Guanlong valve Machinery Co., modernization, will be the future development of the valve industry the main direction. Pursuit of continuous innovation, the valve business to create a new market in order to allow enterprises to survive in an increasingly competitive tide valve industry, and development. Shanghai Guanlong Valve Machinery Co., valves, valve out of Hong Kong, the Hong Kong valve provided by the Dongguan Science and Technology Co., Ltd. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!