Intelligent valve locator

The following is a summary of information about intelligent valve positioners:
1、 Core functions and structure
Working principle
By comparing the valve position feedback signal with the given value through a microprocessor, the I/P unit is driven to output pressure to adjust the valve opening and achieve precise control.
Using a three out of three module (such as China National Nuclear Corporation's patented technology) to process redundant signals, automatically eliminate fault signals, and improve system reliability.
Key components
Piezoelectric valve group (high-resolution pneumatic control), Hall effect detection module (non-contact valve position feedback), PCB circuit board (signal processing).
2、 Technical parameters and characteristics
Parameter Type Typical Value/Characteristic Applicable Standard/Remarks
Input signal 4-20mA.dc or digital signal (such as HART protocol) compatible with mainstream control systems
Basic error ± 0.5%~± 1.0% high-precision adjustment
Explosion proof grade Ex ia Ⅱ C T4~T6 Gb is suitable for hazardous environments such as chemical and petroleum industries
Environmental temperature -30~+80 ° C wide temperature range adaptation
HERION, Germany
SIEMENS Germany
Korea YTC
American ASCO
BETTIS, USA
GOWITCH, USA
TOPWORX in the United States
AZBIL Japan
Japan SMC
British BIFOLD
NORGREN, UK

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