Description

Overview of IP68 Multi-turn Electric Actuator BD/BDM120-C8

When you face extreme conditions, you need an IP68 multi-turn electric actuator that can withstand the challenge. Bonray designed the BD/BDM120-C8 series with this principle at its core. We built this actuator from the ground up to provide unwavering performance in high-temperature zones, vibration-prone areas, and hazardous locations. Our factory uses high-grade aluminum alloy castings, precision-machined components, and a double-seal design to ensure the highest levels of protection. The unit’s IP68 rating, which we verify through rigorous testing, means it can withstand submersion in water up to 2 meters for 48 hours. This IP68 multi-turn electric actuator delivers the reliability you need, whether it’s installed on an offshore platform, in a dusty mine, or within a chemically aggressive processing plant. Our engineering team at Suzhou Bonray focuses on creating products that operate flawlessly for years, reducing unplanned downtime and lowering your total cost of ownership.

How does the IP68 Multi-turn Electric Actuator achieve such a high protection rating?

The BD/BDM120-C8 series uses a dual-seal design. The main enclosure is sealed with O-rings on static joints and oil seals on dynamic ones. More importantly, the electrical connection compartment has its own seal. This means even when you remove the cover for wiring, the internal electronics remain protected from dust and moisture. This Suzhou Bonray engineering approach allows our multi-turn electric actuator to achieve its IP68 rating.

Features

We built this IP68 multi-turn electric actuator with a focus on mechanical resilience. The housing is made from lightweight but robust aluminum alloy, providing a strong, corrosion-resistant shell that is easy to handle. The non-intrusive design eliminates shaft penetrations, which are often the source of ingress in conventional actuators. This is a key advantage of the Bonray design.

Internally, we lubricated all moving parts with high-grade grease that never needs replenishing. This maintenance-free approach reduces the need for personnel to interact with the actuator in potentially dangerous locations. The manual operation feature also includes a “pull-and-push” handwheel with a lockout provision. You can engage it for emergency operation and lock it to prevent unauthorized manual intervention, adding an extra layer of security. The optional split-body design (BD/BDM-C8F) takes durability even further, physically separating the sensitive electronics from the actuator body, which may be subjected to high vibration or extreme temperatures.

Protect Function of IP68 Multi-turn Electric Actuator

The BD/BDM120-C8 IP68 multi-turn electric actuator does not rely on external systems for its protection. It has a robust set of internal defenses. The automatic phase adjustment ensures the motor always receives the correct phase sequence, preventing miswiring damage. Phase loss protection immediately disables the motor if a phase is missing, preventing overheating. The motor thermal protection, via a relay embedded in the windings, provides direct and immediate temperature monitoring.

The valve seizure protection feature is a clever Bonray innovation. If the valve sticks, the actuator temporarily overrides the torque protection for a short burst. This helps break the valve loose, potentially saving a stuck valve and avoiding a costly shutdown. The instantaneous reversal protection also prevents mechanical shock, extending the life of the gear train. Combined, these features ensure your multi-turn electric actuator can handle the unexpected and continue operating safely.

Specifications

• Protection Class: IP68 (waterproof). Explosion-proof: Ex db IIC T4 Gb (gas), Ex tb IIIC T130℃ Db (dust).
• Construction: High-grade aluminum alloy, double-seal design, O-ring static seals, oil seal dynamic seals.
• Temperature Range: Standard -30°C to +70°C; available down to -40°C or up to +100°C with customization.
• Cable Entries: one M27x2 and two M20x1.5. 
• Manual Operation: “Pull-and-push” handwheel with lockout provision (lockable).
• Lubrication: Maintenance-free, high-grade grease for life.

Control 

We designed the control logic for reliability above all else. The local controls use magnetic Hall sensors, which have no physical contacts to wear out or compromise the housing seal. The remote control options are designed for fail-safe operation. ESD control, for example, can be configured to override any other command, ensuring the valve goes to a safe position in an emergency. You can set ESD to high or low level, and even choose whether it should override motor thermal protection or intermittent run controls.

For installations requiring simplicity and fail-safe behavior, the two-wire control feature is ideal. You can configure it for “signal on, no-signal off” or vice versa, creating a simple, reliable emergency shutdown or fail-safe system. The multi-turn electric actuator can handle these critical tasks because we built the control architecture on a solid, dependable foundation at Suzhou Bonray.

Model and Type

We structure the BD/BDM120-C8 series IP68 multi-turn electric actuator to give you options for your specific environment. The standard BD-C8 On-Off Type and BD-C8 Intermittent Modulating Type both come with the same durable construction and IP68 rating. For applications requiring frequent modulation, the BDM-C8 Frequent Modulating Type incorporates solid-state relays and a heavy-duty motor, ensuring it can handle up to 1200 starts per hour in demanding environments.

For the most extreme conditions, the BD/BDM-C8F Split-Body Type is the ultimate solution. This multi-turn electric actuator places the electronic control unit in a separate, protected enclosure. You can mount the actuator on a vibrating pump or in a high-temperature steam line, while the control unit sits safely in a nearby cabinet, away from the stress. This Suzhou Bonray design ensures the intelligence remains protected, even when the actuator is not.

Matching with Gearbox

We built our gearboxes with the same rugged philosophy as our actuators. When you pair a BD/BDM-C8 multi-turn electric actuator with a Suzhou Bonray W Series worm gearbox, you get a solution capable of handling huge torque outputs for large butterfly valves in severe service. The gearboxes themselves are robustly constructed with high-strength materials, ensuring they can withstand the torque and environmental conditions of your application.

Related Product: Multi-turn Electric Actuator BD-C6