Product Architecture
- The V18345-2020521001 represents the pinnacle of ABB’s TZIDC digital positioning technology.
- Designed for both linear and rotary actuators, this electro-pneumatic powerhouse utilizes a two-wire FSK module for HART communication.
- The “Fail-Freeze” capability ensures the actuator maintains its current position during electrical power failure.
Configuration Logic & Tree Structure
- V18345 — Base Series: TZIDC Digital Electro-Pneumatic Positioner
- └── 2 — Case: Varnished Aluminum, IP 65 (NEMA 4X) with Mechanical Indicator
- └── 0 — Fixed reserved digit
- └── 2 — Communication: 4-20 mA with HART Protocol
- └── 0 — Protection: Standard (Non-Explosion Proof)
- └── 5 — Output: Double Acting, Fail-Freeze Function
- └── 2 — Connections: 1/2-14 NPT Cable / 1/4-18 NPT Air
- └── 1 — Feedback: Analog Position Feedback Module (4-20 mA)
- └── 1 — Design: Standard Varnish
Technical Parameters
- Brand: ABB
- Model: V18345-2020521001
- Input Signal: 4…20 mA (Nominal range), HART FSK communication.
- Output Pressure: 0…6 bar (0…90 psi).
- Air Capacity: 13 kg/h @ 6 bar (6.0 scfm).
- Protection Class: IP 65 / NEMA 4X.
- Safe Position: Double-acting, Fail-Freeze.
- Feedback: Integrated analog position feedback (4-20 mA).
Oiltech Controls Limited’s Insight
- The V18345-2020521001 is a preferred choice for plants requiring high air throughput without external boosters.
- The mechanical position indicator included in this case code is invaluable for local troubleshooting when digital loops are offline.
- Fail-freeze logic is essential for reactors where sudden valve movement could disrupt process thermal stability.
Equipment Compatibility & Diagnostics
- Suitable Devices: Globe valves, butterfly valves, and ball valves using pneumatic piston actuators.
- Diagnostic Power: Enables “Autostroke” calibration and valve signature analysis via HART.
Logistics & Warranty Terms
- Condition: New and original, factory-sealed packing.
- Warranty: Professional 12-month factory warranty provided.
- Dispatch: Fast 24-48 hour shipping via FedEx, UPS, or DHL.
Expert FAQ & Selection Guide
- Question: What is the primary difference between Fail-Safe and Fail-Freeze in this model?
- Answer: Fail-Freeze (Option 5) locks the air in the chambers to keep the valve in its last position, unlike fail-safe which exhausts air.
- Question: Can this positioner be used in hazardous zones?
- Answer: No, the V18345-2020521001 is the “0” code version for non-explosion-proof areas.
- Question: Does the analog feedback module require a separate power supply?
- Answer: Yes, the feedback loop is usually powered by the DCS separately from the control signal.
- Question: How do I handle NPT threads during installation?
- Answer: Use PTFE tape on the 1/4″ NPT air ports but prevent debris from entering the internal pilot valve.
- Question: Is this model suitable for extremely high-speed valve cycling?
- Answer: Verify the 13 kg/h air capacity against your actuator volume to ensure the stroke speed meets requirements.
Contact Information Inquiries: info@oiltechcontrols.com, +86 158 8020 0923
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