Technical Specifications:

• Product Series: MV2 Series Smart Valve Positioner
• Model Number: MV2MV208-3-2-1
• Input Signal: 4–20mA DC (2-wire, HART 7 compatible)
• Output Signal: 20–100 kPa (3–15 psi) to pneumatic actuator
• Supply Pressure: 140–700 kPa (20–100 psi)
• Stroke Configuration: Single-acting or Double-acting (configured by -1)
• Accuracy: ±0.5% of full stroke
• Response Time: Less than 0.5 seconds (typical)
• Communication: HART 7 protocol
• Operating Temperature: -40°C to +80°C
• Enclosure Rating: IP66/IP67 (weatherproof)
• Explosion Proof: Ex d IIC T6 Gb (available in certified variants)
• Dimensions: Approximately 160 × 160 × 200 mm (W×H×D)
• Weight: Approximately 3.5 kg

Functional Features:

• HART 7 communication for remote configuration, calibration, and diagnostics
• Auto-calibration function with push-button setup
• SIL 2 / SIL 3 certified (for safety instrumented functions per IEC 61508/61511)
• Self-diagnostics with detailed status reporting (air supply, signal, actuator)
• Multiple input signal options: 4–20mA, 4–20mA/HART, Foundation Fieldbus, Profibus PA
• Fail-safe action: Air-to-open (ATO) or Air-to-close (ATC) with spring return
• Linear characteristic with adjustable gain
• Position feedback via LVDT (Linear Variable Differential Transformer) sensor

Performance Parameters:

• Supply Air Pressure Range: 140 to 700 kPa (20 to 100 psi)
• Output Pressure Range: 20 to 100 kPa (3 to 15 psi)
• Air Consumption: Standard: 300 NL/min, High flow: 1400 NL/min
• LVDT Resolution: 0.1% of stroke
• Linearity: ±0.5% of full stroke
• Hysteresis: Less than 0.3% of full stroke
• Deadband: Less than 0.2% of full stroke
• Ambient Temperature Effect: Less than ±0.1% per 10°C

Material Composition:

• Housing: Die-cast aluminum alloy (ADC12) with epoxy coating (standard), Stainless steel 316L (corrosive environments)
• Diaphragm: Fluoroelastomer (FKM/Viton) or EPDM
• Internal Pneumatic Components: Stainless steel 316L, Brass (C3604)
• Electronics Enclosure: Polycarbonate with UV-resistant coating
• Terminal Connection: Cable gland entry (Ex d version)

Structural Features:

• Top-mounted design — mounts directly on the valve actuator per IEC 60534
• LCD display with navigation buttons for local operation
• HART communicator port for configuration
• Air supply connection: 1/4″ NPT (standard)
• Electrical connection: Cable gland entry (Ex d version) or conduit entry
• Key lock for parameter protection

Working Principle: The MV2MV208 receives a 4–20mA control signal from the DCS/PLC. The internal microprocessor compares the desired valve position (from the input signal) with the actual valve position (measured by the LVDT sensor on the valve stem). The positioner drives the pneumatic actuator by adjusting the output air pressure through a flapper-nozzle mechanism until the actual position matches the desired position. The HART protocol enables bidirectional communication for remote parameter adjustment, diagnostics, and calibration. The positioner continuously monitors for faults including supply pressure loss, signal loss, and actuator failure.

Advantage Highlights:

• High precision with ±0.5% accuracy
• HART communication eliminates need for separate HART communicator
• SIL 2/SIL 3 certified for safety-critical applications
• Wide temperature range from -40°C to +80°C
• Robust construction for harsh industrial environments
• Auto-setup reduces commissioning time significantly
• Reduced air consumption in low-flow variants

Applicable Industries:

• Oil & Gas (upstream, midstream, downstream, LNG)
• Chemical & Petrochemical
• Power Generation
• Pulp & Paper
• Mining & Minerals
• Water Treatment
• Pharmaceutical

Model Series:

• MV2 Series: MV210, MV220, MV230, MV240, MV260
• Signal Variants: 4–20mA (standard), 4–20mA/HART, Foundation Fieldbus (FF), Profibus PA, WirelessHART
• Actuator Types: Single-acting, Double-acting
• Fail-safe Options: Air-to-open (ATO), Air-to-close (ATC)
• Supply Pressure Options: Standard (140–700 kPa), High pressure (140–1000 kPa)

Installation Requirements:

• Mounting: Direct mounting on rotary or linear pneumatic actuator per IEC 60534-6/8
• Air Supply: Clean, dry, oil-free instrument air at 140–700 kPa
• Ambient Temperature: -40°C to +80°C (standard), -40°C to +120°C (high-temp variant)
• Vibration: Within IEC 60068-2-6 limits
• Orientation: Can be mounted in any orientation (vertical, horizontal, inverted)
• Cable Entry: Use appropriate cable gland for Ex d versions (M20 × 1.5)

Usage Precautions:

• Use clean, dry, oil-free instrument air — contamination causes malfunction and reduced life
• Do not exceed maximum supply pressure of 700 kPa
• Calibrate after installation using HART communicator (BT200) or DCS
• Check LVDT alignment during initial setup
• Replace diaphragm if air consumption increases abnormally
• Firmware updates via HART communicator (BT200) only
• Inspect for corrosion regularly in corrosive environments