Description

Introduction of Multi-Turn Valve Electric Actuator BD-IIC Basic Series

The Multi-Turn Valve Electric Actuator Basic Series BD-IIC serves as a core control device for industrial process control. Engineers have designed it with advanced technology and a robust structure, enabling it to deliver stable multi-turn rotation output in various working scenarios. The actuator covers a torque range of 50N·m to 3000N·m and adopts the ISO5210 standard flange, which ensures wide compatibility with different types of valves. Additionally, it supports both vertical and horizontal installation modes to fit diverse on-site layout requirements. With an IP68 protection grade and an optional explosion-proof structure, the actuator can operate safely in harsh environments, including outdoor locations, humid areas, and sites with corrosive gases. It finds wide application in key industries such as power, petroleum, chemical, and metallurgical, as well as in municipal, environmental protection, and food processing fields, providing stable and efficient valve control for fluid pipeline systems. The BD-IIC comes with a durable housing and anti-corrosion coating, which effectively extends its service life. Manufacturers assemble its internal components in accordance with high standards to ensure long-term stable operation. The explosion-proof version suits IIA, IIB, and IIC explosive gas environments, fully meets strict industrial safety requirements, and reduces the risk of on-site failures—making it a preferred choice for long-term pipeline and valve control projects.

Multi-Turn Valve Electric Actuator Basic Series Features

• Multi-Turn Basic Electric Actuator BD-IIC Parameters
• Output Torque: 50N·m ~ 3000N·m
• Mounting: Vertical or horizontal; easy for wiring, debugging and manual operation
• Connection: Drive jaw coupling; 1–2mm axial clearance; flange standard ISO5210:2001 (GB/T12222-2005)
• Motor: Valve-dedicated three-phase asynchronous motor; rated continuous working time ≤10 minutes
• Protection Level: IP68 (standard); explosion-proof type available for IIA, IIB, IIC T1–T4 hazardous areas
• Control Mechanism: Travel control with 2 groups of micro switches for open/close directions; torque control mechanism; field-adjustable opening indicator
• Operation: Simultaneous manual and electric modes; handwheel for emergency operation; no manual-electric switching device needed
• Wiring: Standard terminal block; reliable internal and external grounding; sealed cable gland
• Ambient Temperature: Suitable for outdoor and harsh environments; corrosion and moisture resistant
• Duty: Intermittent operation; working frequency ≤60 times/hour
• Application: Power, petroleum, chemical, metallurgy, shipbuilding, food, paper making, municipal engineering, environmental protection

Field Application

 

BD-IIC Multi-turn Basic Electric Actuator adapts to diverse industrial on-site working environments. It operates stably in power plants and petrochemical production lines. In addition, the actuator resists moisture, vibration and corrosive gas in harsh outdoor sites. Furthermore, it fits long-term running in metallurgical, paper and light industry facilities. Meanwhile, BD-IIC Multi-turn Basic Electric Actuator supports municipal water supply and sewage treatment systems. It ensures steady valve control for urban pipeline network operation.  Moreover, BD-IIC works reliably in marine and food processing fields. Particularly, its explosion-proof models serve hazardous areas with strict safety standards. Besides, the actuator’s compact structure and flexible installation save on-site space. It maintains consistent performance under wide ambient temperature ranges. Therefore, BD-IIC Multi-turn Basic Electric Actuator becomes a key control component for various industrial automation systems. 

Multi-Turn Valve Electric Actuator Basic Series BD-IIC is equipped with a precise stroke control mechanism. Specifically, this mechanism consists of a decimal gear train, ejector pin, cam, and micro switches. It is driven by an active pinion from the reduction gearbox in order to count rotation cycles. As it operates, the mechanism triggers micro switches at preset positions to cut off motor power. In this way, it controls accurate multi-turn travel and effectively prevents valve over-travel.  Furthermore, it allows users to adjust open and close travel limits. Additionally, the mechanism provides multiple switch groups to meet diverse control needs. Moreover, it works with the torque control mechanism to ensure safe valve operation. Besides, the stroke control mechanism is easy to adjust and maintain on site. Overall, it is a core component for the BD-IIC Multi-turn Basic Electric Actuator to realize accurate position control. 

BD-IIC multi-turn valve electric actuator can be equipped with a multi-turn absolute encoder. Specifically, this encoder records real-time valve position without continuous power supply. Moreover, it tracks multi-turn rotation data and reliably retains position information even after a power failure. In turn, the encoder sends stable position feedback signals to support precise system control.  Thanks to absolute encoder data, BD-IIC significantly improves control accuracy. Additionally, the encoder supports fast parameter reading and ensures reliable signal transmission. Furthermore, it works in coordination with the stroke control mechanism to achieve permanent position accuracy. Beyond that, the encoder enhances the actuator’s self-diagnosis capability and overall operational stability. Overall, it serves as a key component that enables the BD-IIC Multi-Turn Valve Electric Actuator Basic Series to effectively upgrade its control performance.

The BD‑IIC/BDM‑IIC series are professional multi‑turn intelligent electric actuators designed for modern industrial process control. They adopt a non‑invasive structure and allow users to adjust parameters and monitor working status via control knobs or infrared programmers without removing the cover. This feature effectively blocks dust, moisture and corrosive substances, and greatly enhances the stability of electrical components. Meanwhile, the housing uses a double‑sealing design and reaches IP68 protection grade. Optional explosion‑proof versions also meet strict requirements in hazardous gas and dust environments, so the actuators perform reliably in harsh working sites. These actuators integrate high‑precision absolute encoder sensors for position and torque detection. The sensors keep correct valve position data without battery support after power failure, and provide real‑time and accurate feedback. In addition, the product supports rich control modes including local operation, remote analog control, fieldbus control, ESD emergency function and two‑wire control. Users can flexibly select control methods to fit different pipeline and valve systems, and achieve smooth and precise valve adjustment. Furthermore, the series includes complete protection functions such as torque overload, phase loss, motor overheat and instantaneous reverse delay. It complies with ISO5210 standard flanges and can be equipped with W‑series gearboxes to expand output torque up to 300,000 N·m. The actuators are widely applied in power, petroleum, chemical, metallurgy, municipal engineering and environmental protection fields. They provide stable, intelligent and long‑lasting driving solutions for various valve control demands in industrial sites.