Electric pneumatic control valve application prospect and development direction of the analysis

Along with the progress of electronic products, especially to further improve the reliability of the allowed foreign electric actuators produced a qualitative leap, its outstanding performance is high reliability, can be in 5 - 10 years free maintenance; Significant declines, than old-fashioned DKZ, light of DKJ electric actuators are 70% ~ 80%; Appearance is greatly improved; Performance improvement, simplified adjustment, more convenient, easy to use. It is worth mentioning that the implementation of domestic institutions and the gap is too big, remain at the level of the sixties and seventies. Is due to the reliability of the electric actuator has been fundamentally solved, deserve to go up the high reliability of the whole function ultralight pneumatic control valve, make the pneumatic - valve become the true sense of the second generation product, to the next century, this kind of high reliability electronic fully functional ultralight pneumatic - valve will gradually replace the traditional pneumatic valve + electric valve positioner, air source of combinations. In addition to the high reliability, full function, the characteristic of super light, will also bring benefit to useful power is both convenient and save, save the building air station, a series of cost; With pneumatic valve + electric valve positioner, air way of complex, it not only adds to the expenses, lead to a drop in reliability, The more links, poor reliability factors increase) ； From economics point of view, in addition to save the cost of the air supply station, also save the cost of electric valve positioner, now a good imported electrical valve positioner, usually in 5000 ~ 6000 yuan of above, the better price in 8000 ~ 10000, and the price can be basically to buy back the highly reliable electronic actuators; Link is reduced, reducing the workload of maintenance accordingly. In recent years, the development of electric pneumatic regulator is fast, their use has been everywhere. Olympic Games closing ceremony in Beijing, the main torch extinguished used electric pneumatic regulator technology, and according to the proportional control methods such as adjusting control to fuel gas flow, eventually making 8 meters high flame uniform reduce until all go out. Electric pneumatic control valve from birth to now become the mainstream of the pneumatic - valve market, and after a long process. In the beginning, is pneumatic pneumatic control valve is given priority to. Pneumatic pneumatic - valve also does have its advantages, electric hydraulic pneumatic control valve overall weight is very big, hydraulic pneumatic - valve factory must be equipped with complex hydraulic system, technology of complex, the cost is high, have decided the pneumatic regulator may not apply to general factory, and only suitable for some special conditions. And electric pneumatic control valve, the most convenient to use and only have 220 or 380 v power supply, with the input signal line, the ideal control can be realized, need not what pipe laying; In inflammable and explosive occasions, only an anti-explosive actuators can be normal use; Pneumatic control valve of positive and negative role changes very convenient and only on the built-in module Settings with respect to OK, and that for pneumatic pneumatic control valve, it is still a troublesome problem; For large caliber, needs a big torque electric pneumatic control valve, a multi-turn electric actuators, control is not a problem, frequency control of motor speed electric actuators, emerged in the recent can improve on the control accuracy, and achieve the goal of energy saving; Not only has the traditional electronic electric pneumatic control valve, there are now able to HART communication, digital, intelligent pneumatic - valve completely, can realize the online intelligent functions such as diagnosis, alarm, record data, greatly improving the use function of the pneumatic control valve; More combination of the controller, sensors, actuators of intelligent pneumatic control valve, can measure control variable, after the controller operation, the output control signal actuating device of the valve core to adjust medium parameters such as flow, pressure, a smart pneumatic control valve is equivalent to a micro control system, the system and control system for digital communication, coordination control task. Electric pneumatic control valve has been popularized in a variety of plant, especially in some relatively small factories, only a few electric pneumatic control valve, with controller and PLC control system, can achieve automatic control, do not need to how much cost, what is worth promoting. Factories in China to push the process of industrial automation, electric pneumatic control valve is bound to get more and more widely used.