Test proved positive Chi flow state (medium flow direction and the disc rotates in the same direction), the pressure of the sealing surface of torque and media pressure acting valve actuator plate to produce. Positive medium pressure valve plate oblique cone surface and the valve seat sealing surface squeezed more tightly, sealing the better. When countercurrent state seal valves, valve plate and seat by the torque between the drive unit of the valve plate is pressed against the valve seat. With the reverse when the media pressure, the valve plate and seat unit between the positive pressure is less than medium pressure, adjusting ring spring in compensation valve plate deformation energy stored by the load after the seat sealing surface of the tight pressure play the role of automatic compensation. Therefore, this utility model, unlike existing technologies, as installed in the valve plate Nanhai Jiujiang software and hardware multi valve seals, but mounted directly on the body, in the middle seat plate and an additional adjustment ring is a very good two-way hard-sealing method. It can replace the valve, the valve and ball valve. Typically, throttle control and regulate mud medium, requires shorter length of the structure, opening and closing speed (1/4 turn). Low cutoff (pressure difference), recommended use butterfly. In the double-digit adjusted necking ground-channel, low noise, there is the phenomenon of cavitation and gasification, a small amount of leakage to the atmosphere, when the abrasive media has, you can use butterfly. Under special working conditions Watts throttle valve or seal stringent requirements, or badly worn, low temperature (cryogenic) under working conditions, such as when using the butterfly, the need to use a specially designed metal sealing tape adjustment device to three eccentric or double Dedicated eccentric butterfly. Guangzhou Kaiheng valve _ Ming Port Valve (certified) _ valve valve provided by the Hong Kong Science and Technology Co., Ltd., Dongguan Ming. Port Valve Co., Ltd., Dongguan Ming (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the next port of the valve leading the staff warmly welcome all inquiries negotiations to create the next port of the valve a better future.