Pneumatic - valve industry in our country has come a huge fierce competition, the future development trend of the pneumatic control valve is the key of the enterprise and customer care. In the market to become advanced an important subject. At present, the valve must adhere to innovation, adjustment of product structure, to transform traditional products, into high-end valves. Requirements of large-scale enterprise must take the lead to the effort, to get the current domestic third of foreign procurement of valve products, gradually, domestic pneumatic regulator valve industry level and competitiveness, and small businesses, is a specialized production, do a good job in a factory in fujian, to do fine and stronger, make great efforts to improve management, improve the process equipment, improve product quality and grade and competitiveness. In the automatic control of modern factory, the regulator plays a very important role, the production of the factory depends on the correct flow of the liquid and gas distribution and control. These controls both the exchange of energy, pressure reducing, or is a simple container loading, will need some final control elements to complete. The final control element can be thought of as the automatic control of & other; Physical & throughout; 。 In the regulator low energy level and high level necessary for the execution of flow fluid control function, the final control element to complete the necessary power amplification effect. Pneumatic control valve is driven by the air for energy, convenient and reliable, and sufficient resources, 2 it is pneumatic - valve to be some limitations in various aspects, because pneumatic - valve when using gas source in installation, etc. Are more complicated than the electric control valve, but the competitiveness of the pneumatic control Industrial Valves on the market is very big still, and will not be eliminated in the future, and pneumatic control valve in a variety of materials and improve the performance of, there's a lot of space, especially on the development of performance, the sensitivity and the installation of valves, such as high efficiency and energy saving work, real pneumatic control valve in the pneumatic actuator work play to production efficiency and level. In the process of industrial production, a lot of more phyletic, the valve body commonly used is through single-seat, pass-through two-seater, angular, diaphragm, small flow rate, tee, eccentric rotating, butterfly, sleeve, spherical, etc. 10. Before you choose the valve, the control process of medium, the careful analysis of process conditions and parameters, collect enough data to understand the system of regulating valve requirements, according to the collected data to determine the valve type to be used. Especially in pneumatic system control links, need a good regulator. And, in the process of selection, we need to pay attention to what the functional problems? The following economic st pneumatic simple introduce for everybody. 1, smooth regulating function (1) requires the regulator action; (2) small open degree of good regulation performance; 3. Choose the required flow characteristic; (4) meet the adjustable ratio; 5. Small resistance, flow than the big ( Regulator rated flow parameters and the ratio of the nominal diameter) ； 6. Adjust speed. 2, leakage and differential pressure of the cut off this is inseparable, two factors are linked to each other. Leakage should meet the technological requirements, and the reliability of the sealing surface protection measures; Cut off the pressure difference ( The differential pressure Industrial Valves is closed) Must be mentioned, It is a pity that many design institute regulator calculation specification without this parameter) , make the output of the selected the regulator have enough force to overcome it, otherwise it will cause the executing agency to choose big or small. 3, prevent even clean medium, congestion problems, that is not clean the pipe are medium with one regulator in mountains, this is a common failure, so the regulator to collect performance should be considered. Usually angular travel class regulator than straight travel class held in regulating valve performance is much better, so the Angle after stroke regulator use will be more and more of a class. 4, corrosion resistant, it including the erosion, cavitation and corrosion resistance. Mainly involves the selection of materials and the regulator of the service life of the problem, at the same time, involved in economic problems. The essence of this problem should be selected valve has good corrosion resistance and the price is reasonable. If you can choose all the four fluorine valve should not be selected all the corrosion resistant alloy regulator; Can choose the cavitation effect is good, simple structure Angle and pressure regulator ( Meet the service life of two years or so) , you should not choose other high voltage regulator structure complex and expensive. 5, compression and heat resistance the nominal pressure regulating valve, select the working temperature. High pressure side, if only the pressure is not difficult, mainly is the differential assembly produce cavitation; Aspects of heat-resistant, usually solve below 450 ℃ is very easy, and it is also easy to 450 ~ 600 ℃, but to above 600 ℃, the contradiction is prominent; When the temperature at 80 ℃ of cut class regulator choose soft sealing material is usually not desirable, hard seal cutting should be considered. 6, weight and appearance of this problem is very intuitive, must have good appearance, light weight regulator by using manufacturers welcome. Here to change a bias, think regulator is a & other; The boss coarse & throughout; , weight or appearance almost nothing at all. Now we attach great importance to it, thus put forward the regulator should have the feature of miniaturization, light-duty, instrumentation.
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