1, the main control parameters for the valve size specifications. 2, a single butterfly valve plate valve Tanggu agents, simple structure, easy processing, low cost, easy to operate, but the regulation accuracy is poor, only for ventilation and air conditioning system for the switch or coarse adjustment occasions. 3, can be manual, electric or zip-operation, fixed at any angle range of 90 °. 4, the uniaxial single valve plate to withstand limited power, when in the large pressure, large flow rates valve life short. The valve has closed and the general style of the points Tanggu valve supply, insulation and uninsulated points. 5, only a two-position electric control valve, actuator and valve leafy same. China valve industry chain of many Tanggu valve sales, but non-valve power. To see the whole world, China has entered the ranks of the great powers of the valve, but the product quality from the point of view of the valve power is still a long gap. Production industry concentration, low-end products supporting the valve research and development capabilities, the valve industry and low level of manufacturing technology still exists, import and export trade deficit expanded. Really be able to survive in the market of the valve business is definitely not there so much. Tanggu valve agency, out of Hong Kong valve (certified), Shenzhen Tanggu valve by valve, the Hong Kong Science and Technology Co., Ltd. of Dongguan. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ming Kong valve leadership with the staff warmly welcome all inquiries negotiations to create a better valve out of Hong Kong in the future.