ABB V18345-1010521001 TZIDC Electro-Pneumatic Positioner for Double Acting Actuators

Product Overview

When a critical control valve in a double-acting actuator application requires precise positioning and failsafe behavior, the ABB V18345-1010521001 TZIDC electro-pneumatic positioner delivers reliable performance. This intelligent positioner features an operator panel and configurable settings, making it suitable for demanding industrial environments. With a robust aluminum case rated IP65 (NEMA 4X), it withstands harsh conditions while providing accurate valve control.

Technical Specifications Breakdown

The ABB V18345-1010521001 operates with a 4-20mA input signal via an LKS adapter, supporting both direct (4-20 mA = position 0-100%) and reverse (20-4 mA = position 0-100%) action. Its double acting fail freeze action maintains the last position upon signal loss, enhancing process safety. The positioner includes a plug-in module for analog position feedback with a 4-20mA two-wire signal. Key performance metrics include a characteristic deviation of ≤0.5%, adjustable tolerance band from 0.3% to 10%, and adjustable dead band from 0.1% to 10%. The resolution exceeds 4000 steps with a 20 msec sample rate, ensuring responsive control. Ambient temperature influence is ≤0.5% per 10°C change, and vibration influence is ≤±1% up to 10 g at 80 Hz. The unit meets seismic requirements per DIN/IEC 68-3-3 Class III for strong earthquakes, with no effect from mounting orientation.

Industry Applications

In chemical processing plants where precise flow control is essential, the ABB V18345-1010521001 ensures accurate valve positioning despite environmental vibrations. Its double acting fail freeze action prevents unwanted valve movement during power interruptions, reducing the risk of process upsets. In oil and gas applications, the IP65 aluminum case protects against moisture and dust, while the configurable characteristic curve (linear, equal percentage 1:25, 1:50, 25:1, 50:1, or 20-point custom) allows optimization for specific valve characteristics.

Installation & Setup Guidance

Mount the ABB V18345-1010521001 securely to the actuator using the provided 1/4-18 NPT air connections. Electrical connections use 1/2-14 NPT conduit entries. Configure the positioner via the operator panel: set the action (direct or reverse), characteristic curve, and tolerance/dead band parameters according to your process requirements. The LKS adapter simplifies integration with 4-20mA control systems. Ensure the supply air is clean and dry to maintain reliable operation.

Maintenance & Reliability

Regular inspection of the ABB V18345-1010521001 includes verifying air supply quality and checking for leaks at the 1/4-18 NPT connections. The aluminum case requires no special maintenance beyond periodic cleaning. The fail freeze action ensures process safety during power loss, reducing downtime. With a weight of 1.7 kg, the unit is easy to handle during installation. Please verify current lifecycle status and availability with BluePLC Industrial before ordering.

Selection Guide & Purchasing Advice

When selecting the ABB V18345-1010521001, confirm that your actuator requires double acting fail freeze action and that your control system provides a 4-20mA signal. The positioner includes analog feedback (4-20mA two-wire) for position monitoring. For applications needing mechanical feedback, consider alternative configurations. BluePLC Industrial stocks the ABB V18345-1010521001 and can advise on compatibility with your existing valve assembly.