With the valve through a vigorous reform and rapid development, generating valve manufacturers emerged, oversupply, making use of the valve industry to go the route of foreign trade in all types of industrial enterprises were. In the early 2000s up to now were just 10 years, China's rapid development of the industry in Guangzhou professional sales butterfly, bring people's living standards are rising. Some valve manufacturers also thrive in the past 10 years, a wide range of pneumatic valve product sales bring people's living standards further into the high-end. Butterfly business now, in a period of rapid development, prospects butterfly has become more open, improve the technological content and promote high-quality pneumatic butterfly valve products more development, which has been extended to the market to use. But want to market everywhere gem valve business, some business owners some operators cheaper to buy a fabless nameless valve nameplate marked with well-known manufacturers and certification, the formal cause great reputation valve business damage. At the same time damaging the image of the entire industry. And then there are some bad companies even after the secondary waste valve simple rust paint sold to engineering quality brings great security risk. The valve industry, depending on the progress of science and technology as well as our various projects are inseparable from the valve-control equipment. Select the current market more product categories are butterfly valve products, as well as the use of ball valves and globe valves. We England valve devices are electromechanical devices with the development of the industry and continue to perfect for butterfly valve products, electric butterfly is more choice, and many years of experience in valve production of various types of valves we have a summary of product knowledge. Next we integrate the user's knowledge of electric butterfly: the first is prone to problems of electric butterfly valve, straight trip valve stem smaller using the principle of sliding friction is large, small rolling friction. Linear actuator valve stem up and down movement, and packing slightly compressed that it will stem a very tight package Guangzhou butterfly manufacturers, producing a large backlash. To this end, stem design very small, another commonly used filler of PTFE packing friction coefficient in order to reduce hysteresis Guangzhou wholesale butterfly, but the resulting problem is to send small stem, is easily bent, packing too short life. Solve this problem, the best way is to turn valve stem with a tour that rotary type butterfly valve, which stem 2 to 3 times thicker than the straight stem stroke, and use long life graphite packing, stem stiffness, filling long life, but its small friction torque, hysteresis small. There is a cut off pressure rotary type valve is large, large cutting pressure rotary type valve, because together media in the spool or valve on a board on the shaft torque produced is very small, so it can withstand greater pressure. Guangzhou butterfly valve _ _ British company electromechanical provided by City Electrical Equipment Co., Ltd. of England. England City Electrical Equipment Co., Ltd. (www.gdyinglun.com) strong, credible, hydraulic machinery and components industry in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead England into the brilliant electromechanical and you work for a better future!