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众所周知,不论哪个炼厂或者哪个石油化工厂的调节阀应用阀门定位器,都能起到克服阀杆与密封腔之间的动摩擦力和调节阀所受的单向力,增加调节阀的灵活性,放大调节器输出的控制信号减少滞后,改善调节阀的流量特性,实现分程调节等多种作用,以达到改善和提高系统调节质量的目的。然而,阀门定位器能否理想地发挥作
As we all know, no matter which refinery or which petrochemical plant valve positioner, can overcome the dynamic friction between the valve stem and the sealed chamber and regulating valve suffered unidirectional force, increase the flexibility of the control valve , Amplifying the control signal output by the regulator to reduce the hysteresis, improving the flow characteristics of the regulating valve, and realizing the multiple functions such as the split-range regulation so as to achieve the purpose of improving and improving the quality of the system regulation. However, the valve positioner can work ideally