1. Product Introduction

The MC series electric actuators are a new generation of electric actuators independently developed by our company based on existing mature products, combining domestic and international experience and technology. This product features excellent anti-interference technology, convenient debugging operations, and an intuitive human-machine dialogue interface. It is suitable for automated control of gate valves, ball valves, globe valves, throttle valves, diaphragm valves, etc., and can achieve both on-site and remote operation of controlled valves. This product can be widely used in industrial fields such as electric power, building materials, metallurgy, petroleum, chemical industry, municipal, and new energy.

The performance and technical indicators of this series of electric actuators comply with JB/T8219-2016 "Electric Actuators for Industrial Process Measurement and Control Systems", JB/T8528-1997 "Technical Conditions for General Type Valve Electric Devices", GB12223-1989 "Connecting Parts for Part-turn Valve Drive Devices", and ISO5211-2017 "Industrial valves - Part-turn actuator attachments".

2. Product Features

1. Shell Protection

The actuator shell is made of high-pressure cast aluminum alloy, with an epoxy powder coating on the surface, providing strong UV resistance, corrosion resistance, and high fullness, which significantly improves the service life and self-cleaning properties of the coating, making it suitable for various harsh production environments. The shell protection level reaches IP67. In explosion-proof locations, it meets the requirements of Exd II BT4 standards.

2. Power Transmission

The main transmission of the actuator consists of worm gear and worm made of high-strength alloy material, with precision processing that minimizes transmission resistance. Coupled with lubricating oil suitable for different environmental temperatures, it provides comprehensive lubrication, making it more adaptable to various working conditions and maximizing service life.

3. Structural Design

Compared with traditional electric actuators, the MC series products have significant improvements in mechanical, electrical control, motors, manual mechanisms, etc., fully reflecting the advanced technology of the times.

4. Sealing Structure

The actuator adopts a double-seal design structure, with a circular structure on the joint surface and a long stop with a sealing ring combination, ensuring good sealing performance and ensuring that the actuator is completely waterproof, dustproof, and prevents the intrusion of various gases; the standard product protection level is IP67.

5. Manual/Electric Operation

The MC series electric actuators are equipped with a side-mounted handwheel. In the event of a power outage, the actuator can be operated directly via the handwheel.

6. Torque Measurement

The professionally designed torque measurement system can achieve overload protection for the actuator. The mechanical torque measurement system measures torque by using the deformation of a force measuring spring. The torque switch position can be adjusted to achieve torque adjustment.

7. Output Interface

The actuator flange complies with ISO5211 (GB12223) standards, and movable connecting parts can provide square shaft interfaces or other special custom interfaces according to customer requirements.

8. Motor Monitoring and Protection

The motor uses a low-inertia, high-torque servo motor, allowing the motor to quickly reach peak torque after starting.

Overheat Protection: The motor has a precision temperature sensor. When the temperature exceeds the rated value, the motor operation is prohibited, and an overheat alarm message is displayed to prevent damage caused by motor overheating.

Instant Reversal Protection: Using instant reversal delay control technology, when a reverse operation signal is received during the actuator's operation, the control system will first stop the machine, then execute the reverse action after a delay, preventing damage to mechanical transmission components.

Electronic Braking: The adjustable electric actuator ensures that the valve stops at the set valve position through dead zone settings and electronic braking.

9. Precise Valve Position Stroke Measurement and Protection

The actuator uses an absolute encoder to measure valve position stroke, providing high angular resolution; the encoder is a magnetic-electric integrated type, and in the event of power loss, manual operation of the actuator does not risk losing the valve position. Advanced boundary anti-jitter technology is employed to ensure high-speed, stable, and reliable output data, effectively improving system stability and reliability.

10. Highly Integrated Control Circuit

A mature and reliable control circuit design scheme reduces the number of discrete components through large-scale integrated circuit technology, improving overall reliability; an inertial adaptive stepping control strategy effectively addresses the motor's inertia issue, achieving accurate positioning and improving control precision. The electrical control module, as the main intelligent part, features remote control, emergency action, remote hold, remote open, and remote close functions, elevating the electric operation mode of the valve to a higher level.

· Provides on-site programmable monostable relay feedback

· Provides alarm monostable relay feedback

· Input and output signal channels are optically isolated (can withstand 2000V surge voltage)

· Position feedback 4-20mA signal, load resistance: 50Ω to 750Ω, accuracy: adjustable from 0.5% to 3%.

11. Intelligent Self-Detection, Diagnosis, and Protection Functions

It has an intelligent self-check error alarm function. When the electric actuator is powered on, it automatically detects the actuator's functional components to ensure there are no faults; during operation, it monitors functional components in real-time. If a fault occurs, the actuator immediately prohibits operation and simultaneously issues on-site and remote alarm signals, allowing users to quickly identify the cause of the fault and promptly eliminate it to restore operation.

Phase Sequence Automatic Identification: Using optically isolated phase sequence automatic identification circuit, users can connect the power line in any phase sequence, and the valve will always operate in the correct direction.

Phase Loss Protection: If any phase of the three-phase power supply is missing, the motor operation is prohibited, and a phase loss alarm message is displayed.

Prohibition Delay Protection Function: When control models are input simultaneously, the system prohibits operation and automatically delays the direction change.

ESD Protection: Provides flexible emergency protection functions. The emergency action control method can be set through parameters, allowing for individual setting of the action method during emergency protection, such as full open, full close, or hold position. (Intelligent type)

Control status protection: The mechanical lock on the electrical box cover can lock the remote, on-site, or stop status to prevent misoperation; to change parameter settings, a password must be entered to access the settings interface.

Intelligent network security protection (optional for intelligent type): Supports dual redundant field bus communication.

12. Infrared remote control function (intelligent type)

The actuator uses advanced infrared remote control technology, allowing human-machine dialogue through a sealed dialogue window without opening the actuator box cover. The intelligent remote control includes functions such as remote switch control, remote automatic control, and on-site stop. The remote assistance operation function replaces a single manual operation system, making it more convenient, simple, safe, and effective.

13. On-site control (intelligent type)

Using a magnetic rotary switch, the control status conversion between on-site and remote is achieved while completely isolating from the electrical box, allowing for on-site valve control and parameter setting of electric devices.

14. Bus control function (optional for intelligent type)

The communication module adopts an independent structure stacked on the motherboard to meet the needs of different communication media and different communication protocol systems. Currently supported communication protocols include Modbus, PROFIBUS, etc.

3. Basic technical index of the product

● Output displacement type: Partial rotation

● Control method: Intelligent adjustment type, basic type

● Operating environment: A) Temperature range: Under normal conditions -20℃~70℃, low temperature: -40℃~70℃, ultra-low temperature: -60℃~70℃

                    B) Relative humidity: ≤95% without condensation

                   C) Atmospheric pressure 86~106kPa

                   D) Air medium: Non-corrosive gas

● Working power supply: A) Single phase (220    ) V, (50±0.5) Hz; three phase (380±38) V, (50±0.5) Hz;

                   B) Special working power supply to be specified when ordering.

● Input signal: A) Adjustment type: 4-20mA 

                   B) Switch type: Passive contact, 24V, 220V

● Analog input: Current: Impedance 250 Ohms

                   Voltage: Impedance 11K Ohms

● Analog output: Current: Maximum acceptable load is 750 Ohms

                   Voltage: Minimum acceptable load is 50K Ohms

● Basic performance indicators:

                   Basic error: Not exceeding ±1.0%.

                   Position output signal basic deviation: ≤1.0%.

                   Hysteresis: ≤1.0%.

                   Dead zone: 0.3%~1.5% adjustable.

                   Time delay: ≤1s.

                   Temperature rise: ≤60℃.

Insulation resistance: ≥20MΩ between the input terminals and the housing; ≥50MΩ between the input terminals and the power terminals; ≥50MΩ between the power terminals and the housing.

                   Insulation strength: Between input terminals and housing 500V 50Hz; between input terminals and power terminals 1500V 50Hz; between power terminals and housing nominal voltage 220V: 1500V 50Hz; 380V: 2000V 50Hz.

                   Motor insulation grade: F grade.

                   Shell protection grade: IP67.