Introduction to Siemens 2SQ electric device
2 sq series straight travel Siemens electric actuators are based on 2 sa series electric actuator mechanism consisting of turbine, belong to the part of the rotary electric actuator, is suitable for the split ring control or closed loop control system in all kinds of regulating valve and so on straight trip valve, a device which can control or adjust the product of advanced design, complete series, can fully meet the power plant, petrochemical, metallurgical mining and other industries automation needs.

Ii. Features of Siemens 2SQ electric device
1. This series of products can realize intelligent control effect.
2, advanced design, complete series, can fully meet the power plant, petrochemical, metallurgy, municipal utilities and other industries automatic control needs.
3. Reasonable structure, strong generality, can meet the needs of various supporting functions. When equipped with LU intelligent power commutation module, it provides a reliable intelligent device for intelligent electric actuator and DCS technology control.
4. Two or more midway signals can be provided (i.e. midway signals of on and off processes).
5. Dustproof and waterproof, with protection grade of IP67 (IP68 can be customized for special requirements)
6. Convenient adjustment, accurate stroke and torque control.
7, with automatic phase sequence recognition, lack of phase protection, motor overheating protection and other functions.
8, small size, light weight, wide rotation speed range.

Iii. Use of Siemens 2SQ electric device
The 2SQ series electric actuator is used in the open-loop control system, which is suitable for the control of regulating valve. It is mainly operated in the "on" and "off" positions, and the middle position can be set as required.
In addition to the 2SQ switching-type electric actuator, add the ling-3 power control part of the electrical control part, which is the overall control electric actuator. It has the functions of field operation and remote operation, which makes field debugging extremely convenient. It is applicable to switch operation and remote control of all kinds of valves in the open-loop control system. The electric control part (lb-3) is composed of multiple modules, such as film button panel, multi-function board, control power supply, plug-in board and ac contactor. The electric control part is connected with the electric actuator by implementing plug-in and fastening bolt, which can be easily disassembled and replaced. If necessary, (lk-3 power control part) can also be installed in the central control room for separate control

Iv. Check and proofread Siemens model 2SQ electric device
In general, electric actuators do not require maintenance (except for the connection of the output thrust to be wetted regularly), and a routine inspection is usually conducted every 3 months to determine:
1. Whether it conforms to the specified technical parameters
2. Whether the operation of the electric actuator is normal (such as vibration, noise, etc.)
3. Whether fastening parts (such as bolts) are loose
4. Is there any oil leakage
The above is only routine inspection. If further inspection is needed, it must be carried out under specific system conditions. The problems and deviations found in the inspection should be corrected immediately.
The overall inspection of the actuator should be carried out when replacing the lubricating oil in the reducer, and the unit with the inspection ability should undertake this work.

V. repair and maintenance of Siemens 2SQ electric device
Before the maintenance of the electric actuator, necessary safety measures should be taken to ensure the safety of the maintenance. In the maintenance process, the main circuit and each branch should be cut off the power supply, and remove the cable on the actuator, live parts around should be isolated.