This classification not only by theory, the role of the structure divided by Shanghai and Shanghai Valve Manufacturing Co., Ltd., is the world, the most commonly used classification methods. General points valve, globe valve, throttle, instrument valves, piston valves, diaphragm valves, plug valves, ball valves, butterfly valves, check valves, pressure reducing valve, steam trap, control valve, foot valve, filter, blowdown valve. As the valve use is widespread, so it's role is great. For example: In a power plant valve to control the boiler and turbine operation; in petroleum, chemical production, valve control also plays a normal operation of all production equipment and processes. In other sectors as well. Nevertheless, valves comparison with other products is often overlooked. For example: When installing the equipment, people tend to focus on the main machinery equipment, but ignored the valve. This will make the whole production efficiency is reduced or discontinued, or causing all sorts of other accidents. Therefore, the valve selection, installation, use and so must be serious and responsible work. Shortcoming valve actuators is to construct complex, more difficult when using Shanghai Guanlong Valve Machinery Co., Ltd. in damp places for explosive medium, you need to use explosion-proof measures. Valve actuators driven by valve types, Z and Q can be divided into two categories. Output shaft Z type valve electric device can turn out a lot of laps Kaiheng Valve Co., Ltd. in Guangzhou, suitable for driving valve, closing valves, diaphragm valves, etc; Q output shaft type rotary valve actuators only 90. Suitable for driving plug, ball and butterfly valves. According to their type of protection are common type, flameproof (expressed in B), heat-resistant (represented by R) and triple-type (ie outdoor, corrosion, explosion, represented as S). Ningbo Ai Ke Valve 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!