The characteristics of the control valve
: The first generation of the control valve: For nearly a hundred years since the beginning of the 20th century, the control valve is still at the level of the first generation of products. The characteristics of its regulating valve are: ① The single-seat valve, double-seat valve, and sleeve valve of the 1960s and 1970s are the leading products; ② This generation of products is not fully functional, and has to rely on the expansion of product varieties and variants to adapt to Various occasions have resulted in a wide variety of specifications, and the requirements for the use, calculation, selection, adjustment, maintenance, and spare parts of the control valve are particularly high; ③The reliability is poor, and there are many problems during use; ④It is very bulky. Today, the more popular CV3000, fine and small valves have three 30% more than traditional old products: weight is reduced by 30%; height is reduced by 30%; flow coefficient is increased by 30%. But they did not bring about a qualitative breakthrough, but only made improvements to traditional products. The second-generation product of the regulating valve: The second-generation product should have a qualitative breakthrough in terms of reliability, function and weight. The characteristics of its regulating valve are: ① The full-function ultra-light regulating valve has replaced many products with poor reliability, incomplete functions and very heavy weight, and replaced the leading products of the first generation single seat valve, double seat valve, sleeve valve, Become the second-generation leading product; ②The electronic electric full-function ultra-light regulating valve gradually replaces the traditional combination of pneumatic valve + electric valve positioner + air source due to poor reliability of the traditional actuator. In terms of appearance, the second-generation products should have the characteristics of light weight, miniaturization and instrumentation. The third-generation product of the control valve: Its outstanding feature is intelligence, and it meets the requirements of the field bus. The application features are: ①Interface with computer; ②Self-diagnosis improves reliability and further reduces failure rate; ③Improved valve The characteristic curve of the valve is changed, thereby changing the adjustment quality of the valve; ④The variety of the control valve and the requirements for the use of the control valve are further simplified; And some strict requirements put forward by the system on the regulating valve.
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