Description
Explosion-proof Part-turn Actuator Overview
The explosion-proof part-turn actuator from Bonray’s BJ/BJM250-IIC series represents a major advancement in intelligent valve control for hazardous environments. Our factory designed this actuator to deliver non-intrusive, high-reliability operation in explosive gas and dust zones, including IIA, IIB, IIC T1–T4 gas environments and IIIA, IIIB, IIIC T130°C dust environments. You can use this device to automate butterfly valves, ball valves, plug valves, and dampers with absolute positioning accuracy.
At our ISO-certified plant, we integrated a patented planetary gear transmission that replaces traditional worm-wheel mechanisms. This design raises mechanical efficiency by more than 50%, eliminates hand/auto switching failures, and provides excellent self-locking capability. The actuator also features a unique dual-seal enclosure that reaches IP68 protection (submersion at 2 meters for 48 hours). Whether you work in oil refineries, chemical plants, marine vessels, or water treatment facilities, our explosion-proof part-turn actuator ensures safe, continuous operation.
Explosion-proof Part-turn Actuator Features
Non-intrusive full English menu – You can commission the actuator without opening the electrical cover. Magnetic knobs and Hall sensors enable safe adjustment in hazardous areas.
LCD Display Absolute encoding position sensor (BM12) – This patented, non-contact sensor retains valve position after power loss without batteries. It never requires re-zeroing.
Torque Testing Absolute encoding torque sensor – Our factory directly measures output torque in real time. You can set torque protection values from 30% to 100% via the on-site menu.
Simultaneous manual and electric operation – No clutch mechanism means zero switchover failure. You can manually override at any time.
Dual-seal terminal box – The terminal compartment remains sealed even when you remove the cover for wiring, preventing dust and moisture ingress.
Multiple control modes – Use local (jog/held), remote switch (dry contact or voltage), remote analog (4–20mA), ESD (high/low active), bus communication (Profibus-DP, Modbus, DeviceNet, FF, Hart), two-wire control, or intermittent duty.
Comprehensive protection – The actuator includes phase adjustment, phase loss protection, instant reverse delay, motor thermal protection, torque overload cut-off, and valve jam clearing logic.
Stable output contacts – Four field-configurable bistable relays retain their state even during power failure.
Model and Type
The series divides into three operational categories based on duty cycle and control precision:
BJ-IIC Switch Type – No proportional control. Suitable for up to 60 starts/hour, 10 minutes continuous running, 33.3% duty cycle.
BJ-IIC Intermittent Regulating Type – With proportional control. Frequency up to 60 starts/hour (600 for three-phase models). Duty cycle 33.3%.
BJM-IIC Frequent Regulating Type – Uses solid-state relays and high-speed control chips. Frequency up to 1200 starts/hour (600 for single-phase). Duty cycle 50%. Provides higher positioning accuracy for closed-loop control.
| BJ150-IIC | Output speed (rpm) | Rated torque (N.m) | Motor power (W) | Rated current (A) | Locked-rotor current (A) | Number of manual turns (n) | Weight (kg) |
| Single phase | 0.16 | 1500 | 120 | 2 | 2.3 | 65 | 63.5 |
| Three phase | 0.3 | 1500 | 120 | 1.4 | 2.57 | 65 | 63.5 |
Specifications
| Parameter | Details |
|---|---|
| Power supply | Single-phase: 220Vac±10% 50Hz±2%; Three-phase: 380Vac±10% 50Hz±2% (other voltages/frequencies on request) |
| Input signal | 4–20mA; dry contacts; DC24V/AC220V pulse; fieldbus options |
| Output signal | 4–20mA; four configurable bistable contacts; one remote indication contact; one fault alarm contact |
| Contact capacity | 250Vac/5A or 30Vdc/5A |
| Load impedance (current output) | ≤750Ω |
| Angle of rotation | 0–100° (±5° adjustable) |
| Protection class | IP68 (submersible); optional Ex db IIC T4 Gb or Ex tb IIIC T130°C Db |
| Ambient temperature | -30°C to +70°C (lower/higher on request) |
| Enclosure material | Die-cast aluminum alloy |
| Shaft material | Alloy steel |
| Lubrication | High-grade grease |
| Cable entries | Two M20x1.5 and one M27x2 (waterproof); explosion-proof models accept certified cable glands |
Can I use this actuator with a Profibus‑DP network?
Yes. Our factory offers optional fieldbus cards: Profibus-DP, Modbus, DeviceNet, FF, and Hart. Specify the bus type when ordering.
