Ordinary eccentric rotary valve body is a long-necked clip-on valve body, arcuate intercepting or hemisphere coronal ball valve, seat, retainer, stem (main, countershaft), guide sleeve and packing and other components. Parts of a single type, did not do between the different specifications of standardization, serialization, modular, just a simple combination of parts. According to the concept and idea put forward by Conceptual Valve, eccentric rotary concept valve can classify the main parts and components in the valve design according to the requirements of sealing performance or working conditions, Different requirements of the respective product characteristics of the establishment of parts library module. As the eccentric rotary valve is rotated by the eccentric valve and cut off the media, a combination of the advantages of ball valves and butterfly valves. Its leakage is small, can double as shut-off valve, adjustable ratio, small size, light weight, large flow coefficient, high dynamic stability, valve effect (general valve flow characteristics curve will occur at the critical point of distortion, a phenomenon that valve Effect) is not obvious, the disc unbalance force is small (about single-valve 1/2) wide temperature, versatility is good. To change the flow of the same specifications of the valve, simply replace the valve seat, do not have to change valve. Valve cavity structure is simple and easy to apply lining to meet the needs of different media. The valve is superior in overall performance and can be used as an alternative to conventional control valves. It is especially suitable for applications requiring a wide adjustment range (in this case, it can replace a large-d valve with two adjustable smaller valves in parallel to simplify the system and control.) Circulation capacity Large, low resistance conditions. Such as thermal power plants in the deaerator heating steam regulating valve and the main condensate regulating valve and high viscosity medium (such as heavy oil) and so on. Eccentric rotation concept valve requires further study and solution of the problem and is likely to make significant progress in several areas. (1) Computer-aided design of sealing elements in eccentric rotary valve sealing structure is a further study. Non-friction contact seal eccentric rotary valve, self-eccentric rotary valve, airtight eccentric rotary valve structure needs further study. (2) Application research and development of ceramics, high-hardness alloys, high-temperature spraying and new composite materials need further study. (3) Eccentric rotary valve and other control valve dynamic process numerical calculation needs to be further strengthened. High-temperature smoke and dust media, water vapor medium, pulp, sediment and other media numerical methods and techniques in the valve application will greatly improve the valve performance, reduce R & D costs. Shorten the development cycle. (4) high frequency of operation, long life, high load pneumatic actuator there are more defects to be improved. Intelligent electric angle travel actuator is the focus of current and future research and development. Research and development of new bus positioner is the main way to improve the accuracy of pneumatic actuator. (5) The application of ceramic, high-hardness alloy, high-temperature spraying and composite materials, as well as the post-processing technology and capability still need to be improved. (6) Application of fireproof type, low temperature type, ultra-high temperature type, high pressure type and corrosion-resistant abrasion-resistant type and potential market development and promotion. Search Keyword: Valve