| 1. | Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs
工业过程控制系统.气动输出阀门定位器性能评价的方法 |
| 2. | Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs
工业过程控制系统.带气动输出的阀门定位器性能的评价方法 |
| 3. | Industrial process control systems - methods of evaluating the performance of intelligent valve positioners with pneumatic outputs
工业过程控制系统.气动输出智能阀门定位器性能评价的方法 |
| 4. | Air filtering pressure reducing valve , solenoid valve , valve location feedback device , valve gate locator , quick exhaust valce
空气过滤器减压阀，电磁阀，阀位反馈装置，阀门定位器,快速排气阀。 |
| 5. | Industrial process control systems - part 2 : methods of evaluating the performance of intelligent valve positioners with pneumatic outputs
工业过程控制系统.第2部分:气动输出智能阀门定位器性能评定方法 |
| 6. | Industrial - process control systems - part 2 : methods of evaluating the performance of intelligent valve positioners with pneumatic outputs
工业过程控制系统.第2部分:气动输出智能阀门定位器性能的评估方法 |
| 7. | Industrial - process control systems - methods of evaluating the performance of valve positioners with pneumatic outputs iec 61514 : 2000 ; german version en 61514 : 2002
工业过程控制系统.气动输出阀门定位器性能评价方法 |
| 8. | The upper end axis and screw on cylinder body accord with namur standard , it is for installation of feedback device of valve supply and valve locator
上端轴以及缸体上的螺孔符合namur标准。供阀位反馈装置以及阀门定位器的安装。 |
| 9. | The valve positioner based on smart structure or on the fieldbus is becoming an increasingly important technique and is promoting the industry process control dramatically , and now which represents the development direction in the pneumatic actuator
阀门定位器向智能型、现场总线仪表方向发展,给过程控制带来了深刻的变革,代表了气动执行器技术的发展方向。 |
| 10. | However , the research on it is still an immature technique in china . in this thesis , the author studied mainly the method for smart valve positioner which based on 4 ~ 20ma current , which can be configured with hart protocol , and using two - wire system
目前,国外一些大公司已相继研制成功了智能阀门定位器,有的配置有hart协议、 profibus总线、 ff总线等现场总线接口;而国内在这方面的研究尚处于起步阶段。 |
