Adjust the pneumatic valve development characteristics

the first generation of products from the early years of the nineteenth century after hundreds of years, adjust the pneumatic valve is still in the level of the first generation of products. Its regulating pneumatic valve is characterized by: (1) in the 60 s level of single-seat pneumatic valve, two-seater pneumatic valve, pneumatic valve sleeve for the leading product; (2) the generation of product function is not complete, have to depend on the expansion of product variety, variant to adapt to a variety of different occasions, the variety specification is various, used to adjust the pneumatic valve, calculation, selection, adjustment, maintenance, spare parts and other special demanding; (3) poor reliability, when using the problems; (4) very heavy. Nowadays, more prevalent CV and fine small pneumatic valve compared with the traditional old product has more than three % : weight %; Height down %; Flow coefficient increase %. But they didn't bring a qualitative breakthrough, just for traditional products has made the improvement. The second generation product:

from the second generation product reliability, functionality, weight should be qualitative breakthrough. Its regulating pneumatic valve is characterized by: (1) the ultralight regulating pneumatic valve instead of the function of many poor reliability, the function is not complete, and very heavy product, instead of the first generation of leading products single-seat pneumatic valve, two-seater pneumatic valve, pneumatic valve sleeve, become the second generation of leading products; (2) electronic fully functional ultra light regulating pneumatic valve to gradually replace the traditional reliability due to the original actuators is poor, to adopt the 'pneumatic pneumatic valve + electric pneumatic valve positioner, air supply' of the combinations. Look from the exterior, the second generation product should have the characteristics of the light-duty, miniaturization, instrumentation. Third generation product:

its striking feature is intelligent, and meet the requirements of field bus, on the application of the features are: (1) and the computer interface; (2) the diagnosis of further improve the reliability, failure rate decline further; (3) improvement of the pneumatic valve characteristic curve, thus changing the regulating quality of pneumatic valve; (4) adjust the variety of pneumatic valve and to regulate the use of pneumatic valve requires further simplified; (5) on indicators, satisfies the requirement of modern industry reached a new level of performance, such as some industrial department launched the new process and system to adjust some stringent requirements put forward by the pneumatic valve.