ABB V18345-1010521001 TZIDC Electro-Pneumatic Positioner

The ABB V18345-1010521001 is an intelligent electro-pneumatic valve positioner from the TZIDC series, configured for double-acting actuators with fail-freeze function and 4–20mA analog position feedback. It features auto-calibration, HART communication readiness (via plug-in module), and IP65/NEMA 4X aluminum housing. With sub-0.5% accuracy and adaptive control tuning, it provides precise valve positioning for process control applications in chemical, petrochemical, power generation, and water treatment industries.

Q: What is the ABB V18345-1010521001?

A: The V18345-1010521001 is an intelligent TZIDC electro-pneumatic valve positioner from ABB. It is configured for double-acting actuators with fail-freeze function and 4–20mA analog position feedback.

Q: What does "double-acting, fail-freeze" mean?

A: Double-acting means the positioner controls air pressure to both sides of a piston actuator (open and close strokes). Fail-freeze means that on loss of electrical power or signal, the positioner holds the valve at its last position rather than moving to a safe position.

Q: What is the positioning accuracy of the TZIDC?

A: The TZIDC achieves characteristic deviation ≤ 0.5% with > 4,000 digital steps of resolution and 20ms sample rate. Temperature drift is ≤ 0.5% per 10°C.

Q: Is the V18345-1010521001 certified for hazardous areas?

A: No, this specific variant (position 4 = "0") has no explosion protection certification. For hazardous area applications, ATEX-certified variants (model suffix with "1" in position 4) are available.

Q: What are the physical specifications of the V18345-1010521001?

A: The positioner has an aluminum housing with IP65/NEMA 4X protection, weighs approximately 1.7kg, and mounts via NAMUR standard for linear actuators or VDI/VDE 3845 for rotary actuators.