DQB90-1T Explosion-proof Intelligent Electric Actuator

DQB90-1T Electric Actuator Product Introduction

The DQB90-1T is a high-performance partial-turn regulating electric actuator, specifically designed for 90° rotary valves (butterfly valves, ball valves, plug valves, dampers, etc.). It integrates safety protection, precise regulation, and stability and reliability. Manufactured strictly in accordance with national and industry standards, it is suitable for various industrial automation control scenarios such as petroleum, chemical engineering, coal mines, and metallurgy. With a rated output torque of 900N·m, it can meet the driving requirements for large-diameter, high-resistance, and high-medium-pressure pipeline valves. It is a core driving device for achieving remote valve regulation, on-site operation, and safety interlocking. Its performance complies with JB/T8528-1997 and JB/T8529-1997 industry standards, adapts to various complex industrial fluid control scenarios, and provides strong and precise driving support for medium-to-large industrial pipeline systems.

I. Core Performance and Specification Parameters

The DQB90-1T features a rated output torque of 900N·m and a standard output speed of 1r/min as its core performance, meeting the precise regulation needs of large-diameter, high-resistance 90° rotary valves. The power output is strong and stable, capable of efficiently driving high-resistance, high-medium-pressure pipeline valves to complete start-stop and regulation actions. The torque output complies with the core standard requirements for Type 90 actuators, with sufficient power reserve to meet the torque needs of large valve drives and adapt to driving scenarios for larger diameter valves and complex working conditions. The standard power supply is three-phase 380V/50Hz, with customizable special specifications such as single-phase 220V and 660V, compatible with various industrial power grids and power supply needs under different working conditions. The motor uses a specialized flameproof three-phase asynchronous motor with high starting torque, smooth operation, and Class F insulation. It is suitable for a 10-minute short-time duty cycle (customizable to 30 minutes), meeting the needs of intermittent operation in industrial sites and handling complex working conditions such as high-resistance and large-diameter valve drives more capably. Its strong overload capability and small moment of inertia make it suitable for industrial scenarios requiring short-time and intermittent work. Position control accuracy is ≤±1%, and travel repeat positioning deviation is ≤0.5°. The regulation response is sensitive, meeting the needs for continuous fine-tuning of process parameters such as flow, pressure, and liquid level, ensuring the production process remains stable and controllable.

The protection grade reaches IP55, upgradable to IP65/IP67 for special working conditions, possessing excellent dustproof, waterproof, and weak corrosion resistance properties, meeting the usage requirements of complex industrial environments, and adaptable to harsh scenarios such as humidity, dust, and high salt spray. The working environment temperature is -20℃~+60℃, expandable to -40℃~+80℃ for custom versions, with relative humidity ≤95% (no condensation at 25℃), capable of stable operation under various harsh working conditions. The protection mark is dIIBT4, complying with GB3836.1-2000 and GB3836.2-2000 standards, suitable for places with gas mixtures of Class IIA, IIB, Groups T1-T4, and its safety performance has passed authoritative certifications. The mechanical structure adopts an integrated transmission mechanism design, featuring a compact volume and light weight. The standard interface fits the installation of various valves, with 360° arbitrary orientation installation without restriction, making on-site layout flexible and convenient and adapting to different installation space needs. It balances strong dynamic performance with installation convenience, can use direct-connected installation, and adapts to the installation needs of various 90° rotary valves.

II. Regulation Control and Safety Features

As an integrated regulating product, the DQB90-1T has a built-in high-precision control module. It can achieve 4~20mA analog signal input and output without an external control box, completing continuous valve opening regulation and position feedback, simplifying on-site installation and commissioning processes, and reducing on-site construction costs. It can directly receive standard signals from instruments to achieve intelligent control, meeting the convenient control needs of the integrated structure. It supports automatic/manual dual-mode switching and is equipped with a lightweight handwheel mechanism. It adopts a fully automatic manual/electric switching design without a switching handle, allowing manual operation during power outages or commissioning. The switching is stutter-free and labor-saving, improving operational convenience and adapting to on-site emergency operation needs. Note that the handwheel should not be turned during electric operation. It has built-in dual limit protection: travel limit uses high-precision microswitches, with 2-4 contacts each for closing and opening directions, ensuring precise positioning and flexible adjustment; torque limit can be adjusted as needed, with sensitive action and high repeatability, effectively avoiding valve sticking and over-torque damage, and safeguarding equipment and pipelines. Optimized for the characteristics of large-diameter, high-resistance valves, operation is more reliable. Its torque control mechanism can trigger microswitches through the axial displacement of the worm gear to achieve precise torque protection.

It possesses comprehensive electrical safety protection: automatic detection and correction of power phase loss and phase error, eliminating the need for manual wiring adjustments and reducing the risk of operational errors; real-time monitoring of motor overheating, overload, and stalling, with immediate shutdown and alarm signal output upon fault, timely avoiding the risk of equipment damage. The overload protection parameters are optimized for the 900N·m torque output, providing more precise protection and adapting to high-load operation needs, effectively avoiding motor damage caused by stalling or overheating. Input and output signals use photoelectric isolation design with strong anti-interference capability, avoiding control abnormalities caused by electromagnetic interference in industrial sites and ensuring stable signal transmission. An optional bus communication module (Modbus, Profibus, etc.) allows seamless integration into DCS and PLC automation systems, achieving remote centralized control, data acquisition, and intelligent management, facilitating production automation upgrades, and adapting to the centralized control needs of large industrial systems.

III. Structural Design and Durability Advantages

Mechanical transmission adopts a high-precision worm gear reduction mechanism, featuring high transmission efficiency, low operating noise (≤55dB), and strong self-locking performance. It can firmly hold the valve position after power outage, preventing valve position drift caused by medium pressure and ensuring production safety. The transmission structure is optimized for the 900N·m torque output, using high-strength transmission components to significantly improve load-bearing capacity and transmission stability. The worm gear output integrated design eliminates connection gaps, improving transmission accuracy. Some transmission structures can use a two-stage transmission of spur gears and a small tooth difference planetary gear to further improve transmission efficiency. Key transmission components are made of high-strength alloy steel and undergo precision heat treatment, offering high hardness, strong wear resistance, long service life, and no gap loosening during long-term operation, adapting to long-term high-frequency operation needs and meeting the durability requirements of high-torque drives. Valve position feedback uses dual monitoring of a mechanical indicator and electronic sensor, intuitively displaying the opening position with precise data and no error, facilitating on-site observation and commissioning and improving operational convenience. The opening indicator mechanism can cooperate with a pointer and a potentiometer to achieve dual functions of on-site indication and remote transmission feedback.

The housing is made of high-strength cast iron with a surface anti-corrosion spray treatment. Joints are equipped with high-quality rubber sealing rings, and all joint parts have sealing measures, providing dustproof, waterproof, impact-resistant, and anti-aging properties, adapting to long-term stable operation in corrosive environments. Internal circuit modules undergo special treatment with three-proof paint (moisture-proof, salt spray-proof, and mildew-proof), further enhancing equipment corrosion resistance and stability to adapt to complex industrial environments. Electrical interfaces use sealed connectors with firm wiring and good sealing, and the conductor cross-section adapts to 1.5-2.5mm², making installation and maintenance convenient. The overall design is modular, with strong component universality and easy replacement. Connection dimensions, output performance, and electrical wiring can be customized according to user needs, reducing later maintenance costs and downtime, improving equipment operation and maintenance efficiency, and facilitating fault troubleshooting and component replacement.

IV. Application Scenarios and Core Values

The DQB90-1T is widely used in industries such as petroleum, chemical engineering, coal mines, metallurgy, pharmaceuticals, sewage treatment, and gas transportation. It focuses on adapting to the driving needs of large-diameter, high-resistance 90° rotary valves and can be paired with butterfly valves, ball valves, etc., to achieve precise control, adapting to various large industrial pipeline systems. In the petrochemical field, it adapts to the regulation of large-diameter butterfly valves and ball valves in various medium pipelines, ensuring stable medium transportation; in coal mine scenarios, it meets the safety control needs for dampers and gas pipeline valves in underground non-excavation faces, adapting to high-resistance valve drives; in the pharmaceutical and food industries, it adapts to the precise regulation of sanitary pipeline valves, meeting industry hygiene standards; in sewage treatment and metallurgy industries, it is used for the automatic control of large-diameter valves in desulfurization, denitrification, and water supply and drainage systems, helping to meet environmental protection standards and adapting to various industrial fluid control scenarios. It is the preferred equipment for the automation control of angle-travel valves.

Compared with ordinary actuators, the DQB90-1T has strong torque of 900N·m, safety protection certification, precise regulation performance, multiple protection mechanisms, and high protection durability as its core advantages. It solves the pain points of traditional equipment such as poor regulation accuracy, insufficient power, lack of safety, and weak stability, especially adapting to the driving needs of large-diameter, high-resistance, and high-medium-pressure valves. The product complies with JB/T8528-1997 and JB/T8529-1997 industry standards, offering reliable quality and stable performance. It can achieve unattended automatic operation, improving system control efficiency and safety levels. It is an ideal driving choice for large-diameter valves in various industrial regulation scenarios, providing solid support for efficient industrial production.

V. Summary

The DQB90-1T regulating electric actuator integrates the four major advantages of safety protection, precise regulation, stability and durability, and intelligence and convenience. With core characteristics such as 900N·m torque output, IP55 protection, dIIBT4 protection class, and 4~20mA signal regulation, it perfectly adapts to the automation control needs of 90° rotary large-diameter, high-resistance valves. Its performance complies with industry standards and industrial site usage requirements. Relying on stringent quality standards, comprehensive protection functions, flexible installation methods, and broad scenario adaptability, combined with an integrated structural design and reliable transmission system, it provides a solid guarantee for the safe, efficient, and stable operation of industrial processes. It is the preferred driving equipment for large-diameter valves under high-precision regulation conditions, adapting to various complex industrial automation control scenarios.