Foxboro VE4003S2B1 Smart Electric Actuator

Technical Specifications:

• Actuator Type: Electric, multi-turn or quarter-turn (configurable at order)
• Control Signal: 4–20 mA DC (HART superimposed) or HART digital command
• Supply Voltage: 120 V AC / 240 V AC (selectable) or 24 V DC (optional)
• Stroke/Travel: 40 mm (1.57 inch) linear stroke (standard); rotary variants available
• Thrust/Torque: 2500 N (562 lbf) maximum thrust (linear); 250 Nm (184 lbf-ft) torque (rotary)
• Positioner Accuracy: ±0.5% of full stroke
• Response Time: < 3 seconds (0–100% stroke)
• Protection Rating: IP66 / IP67 (NEMA 4X equivalent)
• Ambient Temperature: -20°C to +70°C (-4°F to +158°F)
• Fail-Safe Action: Spring return (fail-close or fail-open, configurable)
• Communication: HART 7 (on 4–20 mA signal)
• Diagnostics: Valve stem position, torque, temperature, cycle count, error codes
• Dimensions (Approximate): 310 mm x 200 mm x 250 mm (L x W x H)
• Weight: Approximately 18 kg (40 lbs)

Functional Features:

• HART 7 Communication: Full bidirectional digital communication for configuration, calibration, and diagnostics
• Integrated Positioner: Electronic positioner with auto-calibration and auto-tuning
• Fail-Safe Spring Return: Spring automatically returns valve to safe position on power loss
• Torque Limiting: Electronic torque limit protects valve and actuator from over-torque damage
• Stroke Limiting: Adjustable end-stop limit switches (open and close)
• Cycle Counter: Tracks total actuator cycles for predictive maintenance
• Partial Stroke Testing: Built-in test function verifies valve operation without full stroke

Material Composition:

• Housing: Die-cast aluminum alloy with epoxy powder coating (corrosion-resistant)
• Gear Train: Hardened steel gears with bronze bushings
• Stem Nut: Acme thread, stainless steel (anti-backlash design)
• Seals: Viton O-rings and PTFE shaft seals for IP66/IP67 rating
• Spring: Stainless steel 316 compression spring (fail-safe)
• Electronics Enclosure: UV-stabilized polycarbonate, gasket-sealed
• Terminals: Stainless steel cable glands, IP68 rated

Structural Characteristics:

• Form Factor: Direct-mounted electric actuator with integral positioner
• Mounting: ISO 5211 direct mount to valve (F05, F07, F10, F14, F16, F25 flange patterns)
• Connection to Valve: ISO 5211 flange adapter with standard bolt pattern
• Housing Orientation: Mountable in any orientation (horizontal, vertical, inverted)
• Cable Entry: 3 x PG21 cable glands (power, signal, HART)

Working Principle:
The 4–20 mA control signal (with HART superimposed) is received by the actuator’s electronic positioner. The positioner’s microcontroller decodes the HART command and drives the electric motor (AC or DC) in the appropriate direction. The motor drives the gear train, which converts rotary motion to linear stem travel via the stem nut. A potentiometer or LVDT provides continuous stem position feedback to the positioner. The positioner compares the actual position to the commanded position and adjusts motor drive until the error is within ±0.5% of full stroke. On power loss, the stainless steel spring overcomes the motor and returns the valve to the fail-safe position. HART communication allows remote configuration of stroke limits, fail-safe direction, and calibration parameters.

Advantages / Highlights:

• HART 7 communication enables in-situ configuration and diagnostics — no separate handheld required
• ±0.5% positioning accuracy — superior to pneumatic actuators
• IP66/IP67 rating — fully protected against washdown, rain, and dust
• Fail-safe spring return — ensures safe valve position on power loss
• Auto-calibration and auto-tuning — simplifies commissioning
• Cycle counter and diagnostics — enables predictive maintenance
• Multi-voltage operation (120/240 V AC or 24 V DC) — flexible installation

Applicable Industries:

• Oil and Gas (pipeline valves, refinery process valves, LNG terminals)
• Chemical and Petrochemical (corrosive service valves)
• Power Generation (boiler feedwater, steam isolation, cooling water)
• Water and Wastewater (large butterfly valves, gate valves)
• Mining and Minerals (slurry valves, isolation valves)
• Pulp and Paper (control valves, on/off valves)

Installation Requirements:

• Mount actuator to valve using ISO 5211 flange adapter — torque bolts to manufacturer specification (typically 40–60 Nm)
• Connect power wiring to terminals L1, L2 (AC) or +, – (DC) — wire gauge per nameplate rating
• Connect control signal to terminals I1, I2 (4–20 mA) — use shielded twisted pair cable
• Connect HART communicator to HART terminals — use shielded twisted pair, 250 Ω in series
• Set supply voltage jumper to correct voltage (120 V or 240 V AC) before energizing
• Configure fail-safe direction (fail-close or fail-open) via HART or local DIP switches
• Set stroke limits via HART commissioning tool

Usage Precautions:

• Do not exceed rated thrust/torque — over-torque will damage gear train and stem nut
• Verify supply voltage jumper setting before applying power — incorrect setting destroys the motor
• For HART communication, install 250 Ω resistor in series with the 4–20 mA loop (typically in the DCS card)
• Do not operate actuator with cable glands removed — voids IP66/IP67 rating
• Lubricate gear train annually with recommended grease (per maintenance manual)
• Do not bypass torque limit — this protection prevents actuator and valve damage
• Perform partial stroke test monthly to verify valve operability
• Replace Viton seals every 5 years or per preventive maintenance schedule