ABB V18345-1021420001 Electro-Pneumatic Positioner for Precise Valve Control

Product Introduction

When process variability and valve positioning errors lead to inefficiency and downtime, the ABB V18345-1021420001 provides a reliable solution. This intelligent, configurable electro-pneumatic positioner from the TZIDC series is designed for linear and rotary actuators, offering precise control in demanding environments. With ATEX II 2 G Ex ib IIC T6/T4 Gb approval, it is suitable for hazardous areas, ensuring safe operation in explosive atmospheres.

Technical Specifications Breakdown

The V18345-1021420001 operates with a 4...20 mA two-wire input and supports HART communication via an FSK module. Its output delivers compressed air from 0 to 6 bar (0...90 psi), with air capacity reaching 13 kg/h at 6 bar supply pressure. The double-acting fail-safe output vents or blocks the actuator upon power loss, ensuring a safe position. The digital input accepts 0...5 V DC for logical "0" and 11...30 V DC for logical "1", with a maximum current of 4 mA. The digital output follows DIN 19234/NAMUR, with switching states defined by current thresholds: >0.35 mA to 2.1 mA for logical "1".

The positioner supports a rotation angle range of 25 to 120 degrees for rotary actuators (optional 270°) and 25 to 60 degrees for linear actuators. Travel time can be prolonged from 0 to 200 seconds independently for each direction, and a dead band time limit of 0 to 200 seconds monitors control deviation. These features allow fine-tuning for slow-acting processes or critical loop stability.

Industry Applications

In chemical processing, the V18345-1021420001 ensures accurate valve positioning despite varying supply pressures, reducing product waste and improving yield. For oil and gas pipelines, its fail-safe double-acting output provides reliable shutdown in emergencies, meeting safety requirements. In power generation, the configurable split range (20...100% of nominal range) enables one positioner to control multiple valves, simplifying system design and reducing costs.

Installation & Setup Guidance

Mount the V18345-1021420001 to linear actuators per DIN/IEC 534/NAMUR or to rotary actuators per VDI/VDE 3845 using the aluminum case. Connect the 4...20 mA two-wire input via the cable thread 1/2-14 NPT, and air pipes via 1/4-18 NPT. Configure the split range and travel limits using the operator panel and indicator. For HART communication, install the FSK module via the connector plug for LKS adapter. Ensure supply air is clean and dry to prevent internal component wear.

Maintenance & Reliability

Regular inspection of the positioner's air filter and seals helps maintain consistent performance. The aluminum case resists corrosion in harsh environments, extending service life. Periodically verify the digital output switching states and the analog position feedback (if the optional plug-in module is installed) to ensure calibration accuracy. Following manufacturer guidelines for periodic testing reduces unplanned downtime and supports long-term reliability.

Selection Guide & Purchasing Advice

Before ordering, verify that the V18345-1021420001 matches your actuator type (linear or rotary) and stroke range. Confirm the explosion protection requirement matches your zone classification (ATEX II 2 G Ex ib IIC T6/T4). For position feedback, consider adding the optional analog feedback module (4...20 mA two-wire). BluePLC Industrial offers this positioner as a new, factory-sealed unit with a 12-month warranty. Contact BluePLC Industrial for current availability and to discuss your specific application needs.