Description

Explosion-proof Multi-turn Actuator Overview

When your process requires continuous modulation, the explosion-proof multi-turn actuator BD/BDM60-IIC series outperforms standard on-off drives. Our Suzhou Bonray production line builds this actuator with solid-state relays and a high-speed control chip, achieving up to 1200 starts per hour (three-phase) and a 50% duty cycle. You get precise positioning for closed-loop control in chemical dosing, power plant soot blowers, or pipeline pressure regulation. The actuator retains all non-intrusive, IP68, and explosion-proof features while delivering smoother, faster response. Torque range from 50 N.m to 3000 N.m, and we can pair it with our W-series gearbox for up to 30,000 N.m.

Explosion-proof Multi-turn Actuator Features

• 1200 Starts/Hour Capability: The explosion-proof multi-turn actuator BD/BDM60-IIC series uses solid-state output switches with no mechanical contacts. This eliminates arc wear and allows continuous modulating duty.

• 50% Duty Cycle: Run the actuator for extended periods without overheating. Perfect for throttling services.

• Higher Positioning Accuracy: Our factory tuned the control algorithm and used a faster processor. The BDM-IIC achieves tighter deadband and better linearity than standard intermittent types.

  

• Absolute Encoding Torque & Position: Real-time torque measurement lets you set precise shut-off torque. The position sensor never drifts.

• Dual-Seal IP68 Housing: Install this actuator in outdoor pits or washdown areas. It withstands 2m submersion for 48 hours.

  

• Non-Invasive Configuration: Set all parameters via magnetic control konb or infrared tool. No need to remove the electrical cover—critical for maintaining explosion-proof integrity.

• Fieldbus Ready: Order with Profibus-DP, Modbus (half/full duplex), Devicenet, FF, or Hart. Redundant bus cards available for critical processes.

• ESD Override with Configurable Action: Define ESD as “disable,” “close,” or “open.” Select high/low active, and whether to ignore motor overheat.

• Automatic Phase Correction & Protection: The explosion-proof multi-turn actuator BD/BDM60-IIC series corrects phase sequence, detects phase loss, and protects against instantaneous reversal.

• Manual Override Without Clutch: Turn the handwheel anytime, even while the motor runs. No manual/electric changeover lever to fail.

• Configurable Output Contacts (S1-S4 & R1-R4): Assign any combination of open/closed limit, over-torque, running, or mid-position. Bistable (S) retain state during power loss; monostable (R) do not.

Model and Type

The BD60-IIC series explosion-proof multi-turn actuator is available in three types: On-Off, Intermittent Modulating, and High-Frequency Modulating.

BD60-IIC On-Off explosion-proof multi-turn actuator has no proportional control function. It is suitable for applications with operating frequency ≤ 60 starts/hour, continuous operation time ≤ 15 minutes, and duty cycle ≤ 33.3%.

BD60-IIC Intermittent Modulating explosion-proof multi-turn actuator has proportional control function. It is suitable for applications with operating frequency ≤ 60 starts/hour (three-phase models can achieve short-term operating frequency up to 600 starts/hour), continuous operation time ≤ 15 minutes, and duty cycle ≤ 33.3%.

BDM60-IIC High-Frequency Modulating explosion-proof multi-turn actuator uses a motor designed for frequent starts. The motor control drive unit employs solid-state relays with no mechanical contacts. By utilizing higher-speed and higher-precision control chips and components, and further optimizing the program and control circuit, it achieves an operating frequency of up to 1200 starts/hour (600 starts/hour for single-phase) at rated modulating torque, with a duty cycle of up to 50%.

The BDM-IIC High-Frequency Modulating Actuator offers higher positioning accuracy than the BD-IIC On-Off Actuator and Intermittent Modulating Actuator. It fully meets the requirements for closed-loop automatic control loop actuation units in most industrial applications.

Specifications

• Power: Three-phase 380Vac (or 400/415/440V, 50/60Hz); Single-phase 220Vac (or 110/115/208/230V).

• Control Signal: 4-20mA (input impedance ≤750Ω), dry contacts, or fieldbus.

• Feedback Signal: 4-20mA (load ≤750Ω, accuracy 0.5%).

• Output Contacts Capacity: 250Vac/5A or 30Vdc/5A.

• Enclosure Protection: IP68 (2m, 48h). Optional Ex db IIC T4 Gb / Ex tb IIIC T130°C Db.

• Temperature Range: -30°C to +70°C.

• Cable Entries: M27x2 + two M20x1.5 (small frames); M32x1.5 + two M20x1.5 (large frames).

• Flange Standards: ISO5210.

How does the BD/BDM60-IIC Explosion-proof Multi-turn Actuator achieve 1200 starts/hour without burning out?

Our factory uses solid-state relays instead of mechanical contactors, plus a motor designed for frequent starts. The control logic also optimizes acceleration profiles.