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ABB TZIDC-120 Electro-Pneumatic Positioner 

1. Key Parameters

• Product Model: TZIDC-120
• Product Series: ABB TZID-Series Industrial Electro-Pneumatic Positioners (Valve Control)
• Core Function: 4-20mA→pneumatic signal conversion; valve position closed-loop control; position feedback; fault diagnosis; actuator protection.

2. Core Features

• High Position Accuracy: ±0.5% full-scale precision ensures tight control of valve opening, adapting to process-sensitive scenarios (e.g., pharmaceutical fluid control).
• Dual-Actuator Compatibility: Supports both single-acting (spring-return) and double-acting valve actuators, reducing product type selection complexity.
• Fast Response: ≤0.5s response time to signal changes, enabling quick adjustment to process fluctuations (e.g., sudden pressure spikes).
• Self-Diagnostics: Monitors internal circuits and actuator status, displaying fault codes (e.g., signal loss, pressure anomaly) for rapid troubleshooting.

3. Application Fields

• Chemical/Petrochemical: Controls globe valves, ball valves for raw material dosing, reactor pressure regulation, and solvent transfer.
• Power Generation: Regulates steam control valves, feedwater valves in thermal power plants to maintain boiler efficiency.
• Oil & Gas: Manages flow control valves in pipelines, separators, and storage tanks for crude oil/gas processing.
• Water Treatment: Adjusts control valves for water flow, chemical dosing (e.g., chlorine), and sludge discharge in treatment processes.

4. Precautions

• Calibration: Calibrate position feedback (via ABB tools) after installation to ensure signal-pressure-position matching; uncalibrated units cause control deviation.
• Mounting: Ensure tight connection to actuators (ISO 5211 alignment) to avoid position feedback errors from vibration.
• Air Supply: Use clean, dry compressed air (filter pressure dew point ≤-20℃) to prevent internal component clogging/corrosion.
• Spare Parts: Use genuine ABB TZIDC-120 components—non-genuine parts may reduce accuracy or cause actuator damage.

The structure and details of the product：

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