Technical Characteristics of SMD Series Products

The SMD series electric actuators inherit all the characteristics of the MD series in design, further optimized to achieve maximum logical control. Both the product functions and anti-interference characteristics have reached the highest point of traditional control circuits.

The motor uses a high torque, low inertia single-phase or three-phase special motor, all motors are equipped with overheat protection relays, and the motor rotor output end is directly connected to the shaft gear, with a short response time.

The mechanical reducer adopts a planetary gear reduction combined with a worm gear drive structure, which has high mechanical efficiency and mechanical self-locking characteristics, ensuring high reliability. It also uses long-lasting lithium-based grease, which can ensure that the actuator does not require replacement or maintenance during a major overhaul period and can be installed and used at any angle.

The SMD series electric actuators use advanced integrated circuit devices in their electrical components, where the single-phase drive part is a solid-state relay without mechanical contacts, with a long service life and no need for daily maintenance, capable of operating up to 1200 times per hour, especially suitable for applications in places with high automation rates and frequent operations.

Basic Characteristics of SMD Series:Complete functions, easy operation, and adequate protection. Comprehensive electrical and mechanical protection measures.

1. Multi-level fuse protection

2. On-site handwheel operation 

3. Motor overheat protection

4. On-site electric operation 

5. Signal loss protection

6. Standard current/passive contact control

7. Over-torque protection

8. Mechanical limit protection

9. Electrical limit protection

10. ESD emergency shutdown 

11. Shell protection IP65

12. SMT surface mount technology

13. Convenient limit adjustment

Classification of SMD Series Products

(1) Angular stroke electric actuators: Output torque 100Nm--50000Nm

(2) Linear stroke electric actuators: Output thrust 6.4KN--150KN

(3) Multi-turn electric actuators: Output torque 40Nm--4000Nm

Basic Technical Index of SMD Series Products 

(1) Input control signal: A) Analog signal 4-20mA, B) Passive contact control

(2) Input channel resistance: 250 ohms

(3) Feedback signal: A) 4-20mA; B) Passive contact signal for fully open and fully closed positions

(4) Sensitivity: 1%~3%

(5) Damping characteristics: 0 oscillations

(6) Basic error: 1%~2.5%

(7) Shell protection level: IP65

(8) Motor insulation grade: B(F) grade

(9) Power supply voltage: AC 220V±10%~15%; AC 380V±10%

(10) Working system: 100% start times per hour > 1200 times

(11) Operating environmental temperature: -20~+70℃

(12) Operating environmental humidity: ≤95% no condensation

(13) Insulation resistance: The resistance between the input terminals and the casing should be ≥20MΩ; the resistance between the power terminals and the casing should be ≥50MΩ; the resistance between the input terminals and the power terminals should be ≥50MΩ.

(14) Insulation strength: Input terminals to shell 500V; Input terminals to power terminals 500V; Power terminals to shell  220V power supply  1500V; 380V power supply  2000V

(15) Drift: Drift not exceeding 1.0% of rated stroke within 48 hours

The above indicators comply with the data specifications in JB/T8219-1999 "Electric Actuators for Industrial Process Measurement and Control"

Model of SMD Series Products

Model of SMD Series Angular Stroke Products

Angular stroke electric actuators are divided into direct connection type and base type (with output arm) based on installation method. The direct connection type is suitable for direct connection with valves, with a compact structure, (please consider the temperature of the medium on-site and the feasibility of maintenance). The base type is characterized by easy installation and maintenance (generally requires matching with our factory's GZ type spherical hinge for installation, if users need spherical hinges, please specify separately in the order contract).

The following are the specifications and installation dimensions of angular stroke electric actuators.

Model Table of SMD Series Angular Stroke Electric Actuators

The weights indicated in the table above are for base-mounted products, while the weights for direct-coupled products are in the connection size table.

Note: When ordering, please indicate the angle stroke electric actuator as follows.

Example: SMB+RS160/K30HT indicates an angle stroke actuator with an output torque of 1600Nm, single-phase power supply, 90.   Stroke time is 30 seconds, base-mounted installation method, integrated control method.

SMB+RS400/F70ZY indicates an angle stroke actuator with an output torque of 4000Nm, three-phase power supply, 90. Stroke  time is 70 seconds, direct-coupled installation method, remote control type.

Model Table of SMD Series Angular Stroke Electric Actuators

SMD series direct stroke models and installation dimensions

Direct stroke electric actuators are mainly used with various linear operating valves such as: regulating valves, sleeve valves, etc. Installation and debugging are simple, and performance is reliable.

Three-phase power supply 380V, 50Hz

Single-phase power supply 220V, 50Hz