Description

Introduction of Partial Turn Intelligent Valve Actuator BJ300-Q3

The Partial Turn Intelligent Valve Actuator BJ-Q3 delivers precise torque control across a wide operating range. Engineers design this actuator series for demanding industrial valve automation tasks. Its modular architecture supports torque outputs from 50 N·m to 5000 N·m with remarkable consistency. Multiple frame sizes accommodate ball valves, butterfly valves, and damper drives across numerous installation profiles. Every unit undergoes rigorous factory testing before leaving the production line. The actuator handles up to 60 starts per hour at a 33.3 percent duty cycle with dependable thermal stability.

Meanwhile, the Partial Turn Intelligent Valve Actuator integrates multiple fieldbus protocols directly into its control core. Modbus RTU, Profibus-DP V0/V1, HART, DeviceNet, and Foundation Fieldbus options enable seamless connectivity across diverse plant environments. Additionally, the actuator accepts both 380 Vac and 220 Vac supply voltages for flexible on-site deployment. Operators configure all settings through a non-intrusive interface that eliminates cover removal entirely. Four configurable relay outputs drive external indicators or interlock circuits as required. Built-in ESD functionality provides emergency shutdown capability through dedicated fail-safe wiring terminals. A built-in data logger captures torque profiles and cycle counts for predictive maintenance analysis.

Furthermore, the BJ-Q3 meets stringent international standards including ISO 5211:2017 and GB/T 12223-2023. A robust enclosure achieves IP67 protection with optional IP68 rating for submerged applications. Explosion-proof certifications covering Ex db IIB T4 Gb and Ex tb IIIB T130°C Db extend its utility into hazardous zones. Cable entries accept M20×1.5 or M27×2 glands for flexible wiring arrangements in the field. The operating temperature spans -30°C to +70°C with humidity tolerance up to 90 percent without condensation. In short, this actuator combines intelligence, durability, and interoperability in a single compact package.

Partial Turn Intelligent Valve Actuator BJ300-Q3 Parameters

• Power Supply: Three-phase 380Vac ±10%, 50Hz ±2%; single-phase 220Vac ±10%, 50Hz ±2%; optional AC220~660V, 50/60Hz (compatible with three-phase 3-wire/4-wire systems; specify special requirements when ordering).
• Input Signal: DC4~20mA (only for regulating type); DC24V, AC220V or passive dry contact.
• Output Signal: 4 field-configurable output contacts, 1 remote indicator output contact, 1 fault alarm output contact.
• Output Contact Rating: 250Vac / 5A.
• Output Current Load Impedance: ≤750Ω.
• Rated Torque: 3000 N·m (maximum torque is about 1.5~1.8 times the rated torque).
• Output Speed: 0.3 rpm, 0.5 rpm.
• Stroke: 0~100° (±5° adjustable).
• Protection Rating: IP67 (IP68 optional).
• Explosion-proof Rating (Optional): Gas explosion-proof Ex db IIB T4 Gb; dust explosion-proof Ex tb IIIB T130℃Db.
• Insulation Class: Class F.
• Ambient Temperature: -40℃ ~ +70℃.
• Relative Humidity: ≤90% (at 20±5℃).
• Duty Cycle: Short-time duty, 15 minutes.
• Lubrication: High-grade grease.
• Installation: Mounting flange complies with ISO5211:2017 (GB/T12223-2023); non-standard flanges available on request.
• Cable Entry: Junction box has two M20×1.5 and one M27×2 cable entries; waterproof type uses cable glands for 9~14mm (2 pcs) and 13~18mm (1 pc) cables; explosion-proof type requires user-provided certified explosion-proof cable glands.

  

Absolute Encoder

Building on precise motion control, the Partial Turn Intelligent Valve Actuator employs an absolute encoder for position tracking. This encoder retains positional data even after a complete power loss event. Consequently, operators never recalibrate or reinitialize the system after power restoration. A multi-turn design tracks rotation counts without backup batteries or mechanical counters. Notably, this approach extends service life by removing battery replacement cycles from maintenance schedules. Plant teams appreciate the reduced downtime that follows this design choice.

Moreover, the encoder delivers real-time feedback through a 4–20 mA analog output signal with 750-step resolution. Its linearity stays within 0.5 percent across the full valve stroke under all rated conditions. As a result, control rooms receive exact valve status without signal degradation. The encoder assembly resists vibration and temperature extremes across the full -30°C to +70°C range. In fact, its solid-state design eliminates wear-prone mechanical contacts entirely. Additionally, the Partial Turn Intelligent Valve Actuator sensor technology ensures repeatable performance year after year.

Non-Intrusive Design

Field commissioning tasks often demand quick access without compromising enclosure integrity. The non-intrusive design approach addresses this challenge through magnetic or infrared communication ports. Therefore, technicians configure, calibrate, and diagnose the unit without opening a single cover. This approach slashes commissioning time while protecting internal electronics from ambient contamination. Field crews complete setup procedures in minutes rather than hours.

At the same time, this sealed configuration preserves the IP67 or IP68 protection rating during every field interaction. Moisture, dust, and corrosive agents never enter the electronics compartment during adjustments. In other words, site teams achieve full commissioning without exposing sensitive internals to harsh process environments. The magnetic control interface responds to handheld programmers instantly and reliably. Furthermore, the Partial Turn Intelligent Valve Actuator simplifies compliance with explosion-proof protocols by maintaining enclosure flame paths intact. All critical settings remain accessible while protective barriers stay fully sealed. For example, torque limits and travel stops adjust magnetically without a single screw turn. Ultimately, this design philosophy extends equipment lifespan by keeping the enclosure permanently closed.

Fieldbus Card

At the core of networked valve automation, the bus card enables multi-protocol communication across plant-wide control systems. A single card supports Modbus RTU, Profibus-DP V0/V1, and DeviceNet protocols natively. Moreover, HART and Foundation Fieldbus options extend connectivity into demanding process industry applications. Each protocol option ships with pre-certified configuration files that simplify system integration work.

Consequently, plant engineers integrate the Partial Turn Intelligent Valve Actuator into existing DCS or PLC architectures without protocol converters. The bus card handles bidirectional data exchange at industry-standard baud rates with proven reliability. In addition, status registers feed back valve position, torque, and alarm information in real time. Remote command signals reach the actuator through galvanically isolated channels that preserve signal integrity. Furthermore, redundant communication paths provide fail-safe operation during network interruptions. Ultimately, this communication backbone turns a standalone actuator into a fully integrated field asset. Specifically, control engineers gain remote access to configuration, diagnostics, and firmware updates over the network. Taken together, these bus capabilities future-proof the valve automation investment for evolving plant requirements.

Related product: Intelligent part-turn Electric actuators BJ-Q1