What is ND9106HXT / ND9000 Series Valve Controller

• ND9106HXT belongs to the ND9000 Series of intelligent valve controllers (or positioners), made by Neles (now part of Valmet / Metso family).

• It is a smart, loop-powered valve positioner / controller designed to control rotary or linear valves, compatible with a broad range of actuators — i.e. both single-acting and double-acting pneumatic actuators. 

• It is intended for industrial process automation — petrochemical, oil & gas, marine, power-plant, etc., where precise valve control, safety, diagnostics and reliability are needed. 

✅Full Code Interpretation (ND9106HXT)

1. Product Identification

Model: ND9106HXT
Series: ND9000 Intelligent Valve Controller
Type: Smart, pneumatic valve positioner / controller
Application: Linear & rotary pneumatic actuators, control valves

2. Key Features

• Intelligent microprocessor-based valve controller

• Advanced diagnostics (valve performance, friction, stiction, air use)

• Loop-powered 4–20 mA with HART communication

• High-capacity internal spool valve for large actuators (>3 dm³)

• Rugged IP66 / NEMA 4X weatherproof enclosure

• Full ATEX + IECEx certifications for hazardous areas

• Universal mounting (VDI/VDE 3845)

3. Model Code Breakdown

4. Electrical Specifications

• Input signal: 4–20 mA (HART protocol)

• Supply voltage: Loop powered, up to 30 VDC

• Load capacity: Up to 485 Ω at 20 mA (≈9.7 V drop)

• Internal position transmitter: 4–20 mA passive (if enabled)

• Cable entry: M20 × 1.5 (others optional)

5. Pneumatic Specifications

• Spool valve type: High-capacity (code 06)

• Actuator size: >3 dm³ stroke volume

• Air connections:

  • ND9100: G 1/4

• Air supply: 1.4–8 bar typical (depending on actuator)

• Air consumption: Minimal during steady state (digital control)

6. Environmental & Mechanical

• Enclosure: IP66 / NEMA 4X

• Operating temperature limits:

  • T4: –40 °C to +80 °C

  • T5: < +65 °C

  • T6: < +50 °C

• Vibration resistance: High industrial-grade tolerance

• Mounting: Universal shaft, adapter supplied

7. Hazardous Area Certifications (Code X)

ATEX & IECEx (Gas + Dust)

Gas protection:

• II 1 G Ex ia IIC T6…T4 Ga

• II 2 G Ex ib IIC T6…T4 Gb

• II 3 G Ex nA / ic IIC T6…T4 Gc

Dust protection:

• II 1 D Ex ta IIIC T90 °C Da

• II 2 D Ex tb IIIC T90 °C Db

• II 3 D Ex tc IIIC T90 °C Dc

Supports:

• Intrinsically safe (Ex ia, Ex ib)

• Non-sparking / energy-limited (Ex nA, Ex ic)

• Dust-ignition-protected (Ex t)

8. Communication & Diagnostics

• HART 5/7 protocol

• Performance diagnostics (friction, deadband, response time)

• Alerts & alarms (air supply, travel deviation, actuator integrity)

• Optional valve signature & tuning tools

• PC configuration via HART modem or handheld communicator

9. Typical Applications

• Control valves in:

  • Oil & gas

  • Petrochemical plants

  • Refineries

  • Power plants

  • Water & wastewater

  • Marine / LNG

🎯 What ND9106HXT is Good For — Typical Applications

Because of these specs and features, ND9106HXT / ND9000 valve controllers are well suited for:

• Industrial process automation involving pneumatic control valves — e.g. in oil & gas, petrochemical, chemical, power generation, marine, LNG, etc.

• “Smart” valve control where remote monitoring, self-diagnostics, and feedback are important (e.g. to detect wear, friction, valve “stiction,” performance degradation over time).

• Harsh / hazardous areas: due to ATEX / IECEx certification and rugged, weather-proof enclosure (IP66 / NEMA 4X).

• Retrofit upgrades — replacing older, simpler pneumatic positioners / I/P converters — because ND9000 is designed to fit many existing actuators with proper mounting kits.