Abstract: In the unit capacity of 50MW and below the small electric power plants often use a regulating valve means, the choice of electric valve if appropriate, directly affecting the quality of automatic control system of regulation. This will electric control valve selection and the method of calculation are introduced.
Keywords: electric valve; single seat; two-seater; flow characteristics; flow capacity
Abstract: In the analysis of the existing steam turbine control valve design on the basis that its shortcomings and put forward new ideas for valve design. The introduction of new ideas in the numerical calculation steps, through the control valve flow field numerical simulation, the internal details of the flow control valve information. On this basis to find unreasonable flow problem, and through appropriate measures to improve and optimize the flow structures, in order to achieve improve aerodynamic performance valve purpose. Then the optimized model test valves, valve design finalized. Additionally, a control valve flow field is calculated, and the new valve design ideas proposed in the numerical calculation to optimize the flow field based on the idea of a specific example is the numerical calculation for flow field in the problems of the valve-type line for appropriate adjustments to improve the aerodynamic performance.www.cn-hdfm.com
Abstract: This paper medium on the production units of different analysis requirements for corrosion protection, focuses on the use of stainless steel in most austenitic stainless steel in the petroleum, chemical, light industry, food, medicine and other industry applications.
CN HDFM. Austenitic stainless steel is stainless steel up to class, use the largest one (about the stainless steel production of 65 ~ 70%). The most commonly used austenitic stainless steel is Fe-Cr-Ni alloys (ie, AISI300 U.S. Department of steel in China were shown in Table 1); Fe-Cr-Ni-Mn system (AISI200 the United States Department of steel in China comparison see Table 2); special austenitic stainless steel (see Table 3) three kinds.
An automatic control system, regulating valve actuator of its common. Control process is stable depends on the ability to accurately regulating valve action, making the process control flow of embodied energy and materials, the exact change. Therefore, according to the different needs of different valves. Select the appropriate design of regulating valve is the main pipeline issue, but also to ensure the safety and smooth running conditioning system key.