| 摘要 |
PROBLEM TO BE SOLVED: To provide an economical pressure control type positioner of excellent performance that does not cause an excessive positioning of the supplied pressure to the driving section against an adequate position by removing the conventional defect of the pilot valve for the valve positioner. SOLUTION: The pressure receiving section feeding back the output pressure is provided against the power of the pressure receiver (nozzle back pressure chamber) that receives the air pressure signal (nozzle back pressure) from a nozzle flapper mechanism in the pilot valve of the valve positioner. COPYRIGHT: (C)2004,JPO
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