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ABB V18345-1010121001 Electro-Pneumatic Positioner 

1. Key Parameters

• Product Model: V18345-1010121001
• Order Code: V18345-1010121001
• Product Series: ABB V18345 Series Industrial Electro-Pneumatic Positioners (Smart, HART-Enabled)
• Core Function: Converts 4~20mA DC electrical signals to proportional pneumatic pressure; controls valve actuator position with high precision; provides real-time position feedback and diagnostic data; supports remote configuration via HART protocol
• Electrical & Pneumatic Specifications:

  Parameter	Details	Performance Metrics
  Input Control Signal	4~20mA DC (2-wire loop-powered); Input impedance: 250Ω ±10% (at 24V DC)	Compatible with standard DCS/PLC control systems
  Position Feedback Signal	4~20mA DC (optional, isolated from control signal); Accuracy: ±0.1% of full scale (FS)	Enables closed-loop position monitoring
  Pneumatic Output	- Pressure Range: 0.2~1.0 bar (for single-acting actuators); 0.2~1.4 bar (for double-acting actuators) - Output Flow Capacity: ≥150 Nl/min (at 1.0 bar supply pressure)	Fast actuator response (<1s for 90% stroke)
  Supply Air Requirements	Clean, dry compressed air (ISO 8573-1: Class 4.4.3); Pressure Range: 1.4~7.0 bar (max 8.0 bar)	Requires in-line air filter/regulator (recommended ABB FRL units)
  Positioning Accuracy	±0.5% FS (at ambient temperature, 25℃); ±1.0% FS (over operating temperature range)	Ensures precise process control (e.g., flow, pressure, level)
  Response Time	≤0.3s (for 63% step change); ≤1.0s (for 90% step change, double-acting actuator)	Minimizes process fluctuations during setpoint adjustments
  Communication Protocol	Built-in HART 7.0 (superimposed on 4~20mA signal); Supports device configuration, parameter adjustment, and diagnostic data upload	Enables remote maintenance via ABB FieldCare or HART communicators

• Mechanical & Environmental Specifications:
  • Housing Material: Aluminum alloy (epoxy coating, corrosion-resistant); Flame-retardant (UL94 V-0)
  • Dimensions (L×W×H): 180mm × 120mm × 85mm (excluding mounting bracket and air connections)
  • Mounting: Direct mounting to valve actuator (ISO 5211 standard mounting pattern: F03~F16); Optional bracket for remote mounting (max 1m from actuator)
  • Weight: Approximately 1.2kg (without mounting hardware)
  • Protection Rating: IP66 (front panel); IP65 (connections); Optional IP67 for submersible applications
  • Explosion Protection (Optional): ATEX Ex d IIC T6/T5; IECEx Ex d IIC T6/T5; UL Class I, Div 1, Groups A~D (for hazardous areas)
  • Operating Temperature Range: -40℃~+85℃ (-40℉~185℉); Optional extended range: -50℃~+100℃
  • Storage Temperature Range: -50℃~+100℃ (-58℉~212℉)
  • Humidity Tolerance: 0~100% RH (including condensing; suitable for damp process areas)
  • Vibration Resistance: 10~2000Hz, 2g acceleration (IEC 60068-2-6; no positioning drift)
  • Shock Resistance: 50g acceleration (11ms duration, IEC 60068-2-27; maintains mechanical integrity)
• Compliance Standards: IEC 61508 (SIL 2 capable), EN 61000-6-2 (EMC immunity), ISO 5211 (valve actuator mounting), CE, RoHS, ATEX/IECEx (hazardous area), UL 1227 (industrial control equipment)

2. Key Features

• High-Precision Positioning: ±0.5% FS accuracy ensures precise valve control, critical for process variables like flow, pressure, or level in demanding applications (e.g., chemical reactor feed control, oil pipeline pressure regulation)—reduces process deviations by 30% compared to standard positioners.
• HART 7.0 Smart Communication: Built-in HART protocol enables remote configuration (e.g., setpoint adjustment, deadband calibration) and real-time diagnostic data (e.g., actuator wear, air supply pressure) via DCS or HART communicators—eliminates 80% of on-site maintenance visits.
• Dual-Actuator Compatibility: Supports both single-acting (spring-return) and double-acting pneumatic actuators; adjustable output pressure range (0.2~1.4 bar) adapts to diverse actuator sizes (F03~F16), reducing the need for multiple positioner models.
• Rugged Environmental Design: IP66/IP65 protection, -40℃~+85℃ temperature range, and 2g vibration resistance ensure reliability in harsh conditions (e.g., offshore oil platforms, desert power stations)—99.9% uptime in continuous process operations.
• Auto-Calibration & Self-Diagnosis: One-touch auto-calibration (via HART or local button) simplifies commissioning; built-in diagnostics detect faults like actuator jamming, air supply loss, or signal drift—alerts operators to issues before they cause process shutdowns.
• Explosion-Proof Option: ATEX/IECEx Ex d IIC T6/T5 certification enables use in hazardous areas (e.g., chemical vapor zones, oil refinery process units)—ensures compliance with global safety standards for explosive atmospheres.
• Low Air Consumption: Optimized air flow design reduces supply air consumption by 20% compared to conventional positioners—lowers energy costs for compressed air systems in large-scale process plants.

3. Application Fields

• Process Industry Valve Control: Primary application—precision control of pneumatic valves in process automation:
  • Chemical & Petrochemical Plants: Controls V150 globe valves for reactor feed and discharge; ±0.5% positioning accuracy ensures precise chemical dosing, while HART diagnostics monitor valve stem wear—prevents over/under-dosing that causes product defects.
  • Oil & Gas Production: Regulates V200 ball valves in crude oil pipelines; explosion-proof variant (Ex d IIC T6) operates safely in hazardous zones, and fast response time (<1s) adjusts to pressure fluctuations, preventing pipeline overpressure.
• Power Generation Systems: Optimizes valve performance in power plants:
  • Thermal Power Plants: Controls V300 butterfly valves for boiler feedwater and flue gas dampers; high-temperature tolerance (-40℃~+85℃) withstands boiler-side heat, while position feedback ensures accurate flow control—improves boiler efficiency by 5%.
  • Nuclear Power Plant Auxiliaries: Manages non-critical auxiliary valves (e.g., cooling water circuits); SIL 2 compliance aligns with safety requirements, and low air consumption reduces load on plant compressed air systems.
• Water & Wastewater Treatment: Ensures reliable flow control in water systems:
  • Municipal Water Supply: Regulates diaphragm valves for water distribution; IP66 protection resists outdoor weather (rain, dust), and auto-calibration simplifies maintenance—ensures consistent water pressure for residential/commercial users.
  • Industrial Wastewater: Controls pinch valves for sludge handling; condensing humidity tolerance (100% RH) withstands damp treatment plant environments, while diagnostic data alerts operators to valve clogging—reduces unplanned downtime.
• Food & Pharmaceutical Manufacturing: Complies with hygiene and safety standards:
  • Pharmaceutical Production: Controls stainless steel valves for sterile process streams; smooth, easy-to-clean housing (no crevices) meets GMP requirements, and HART data logging supports FDA 21 CFR Part 11 compliance for process traceability.
  • Food Processing: Regulates valves for ingredient mixing and CIP (Clean-in-Place) systems; corrosion-resistant aluminum housing withstands caustic cleaning agents, ensuring food safety and equipment longevity.

4. Precautions

• Valve & Actuator Compatibility: Ensure the positioner matches the valve actuator’s type (single/double-acting) and size (ISO 5211 F03~F16)—mismatched actuators cause insufficient output pressure or positioning jamming. Verify actuator air consumption (<150 Nl/min) with the positioner’s flow capacity.
• Hazardous Area Installation (Critical): For explosion-proof variants, install in compliance with local hazardous area classification (e.g., ATEX Zone 1 for gas, Zone 21 for dust); use only ABB-approved explosion-proof fittings (e.g., cable glands, air connections) to maintain certification—incorrect installation voids safety compliance and increases explosion risks.
• Air Supply Quality: Use compressed air meeting ISO 8573-1 Class 4.4.3 (clean, dry, oil-free); install an in-line filter/regulator (e.g., ABB VFR series) upstream of the positioner—contaminated air (oil, moisture, particles) clogs internal valves, reducing positioning accuracy by 50% and shortening service life.
• Electrical Wiring:
  • Signal Cable: Use shielded twisted-pair cables (24AWG~20AWG) for 4~20mA signals; ground the shield at the DCS end (single-point grounding) to prevent EMI interference—unshielded cables cause signal noise, leading to positioning drift (±1% FS).
  • Polarity Protection: The positioner is reverse-polarity protected, but correct wiring (positive to +V, negative to -V) ensures optimal HART communication—reverse wiring disrupts data transmission but does not damage the device.
• Calibration & Maintenance:
  • Initial Auto-Calibration: Perform auto-calibration after installation (via HART communicator or local button); ensure the valve is in manual mode during calibration—uncalibrated positioners have ±2% FS default error, leading to process deviations.
  • Periodic Recalibration: Recalibrate every 6~12 months (or after process upsets); use ABB FieldCare software to verify accuracy—drift beyond ±1% FS indicates internal wear (e.g., diaphragm degradation), requiring component replacement.
  • Air Connection Inspection: Check air hoses and fittings quarterly for leaks (use soapy water); even small leaks (1 Nl/min) increase air consumption and cause positioning instability—replace worn hoses with ABB-recommended reinforced tubing.
• Environmental Limitations:
  • Temperature Extremes: Do not operate outside -40℃~+85℃ (or extended range -50℃~+100℃ for optional models)—low temperatures (<-40℃) freeze internal lubricants, while high temperatures (>85℃) degrade rubber seals, causing air leaks.
  • Chemical Exposure: Avoid direct contact with strong acids (e.g., hydrochloric acid) or solvents (e.g., acetone)—these damage the epoxy coating and internal components; use chemical-resistant enclosures in aggressive environments.
• Troubleshooting:
  • Positioning Drift: If drift occurs, check air supply pressure (must be 1.4~7.0 bar) and signal noise (use oscilloscope); low air pressure or EMI are the most common causes—resolve before recalibrating.
  • No Response: If the positioner does not respond to signals, verify power (24V DC) and HART communication; check for actuator jamming (manually cycle the valve)—jammed actuators cause internal pressure buildup, triggering safety shutdown.

The structure and details of the product：

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