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The Basic knowledge electric actuators

   Electric actuator is a common driving device, which can accurately control the position of the valve and is a very modern equipment. It can prevent the danger from spreading further and reduce the loss of the factory to a small amount, making it popular among the public. Its anti-deflection ability is very good, the output thrust or torque is basically constant, it can well overcome the unbalanced force of the medium, and achieve accurate control of the process parameters, so the control accuracy is higher than that of the pneumatic actuator. If equipped with a servo amplifier, the positive and negative effects can be exchanged easily, and the signal-off valve position state (hold/full open/full close) can be easily set, and it must stay in the original position when a fault occurs. Pneumatic actuators can't do it. Pneumatic actuators must rely on a set of combined protection system to achieve position retention.

 The actuator is an essential part of the automatic control system. Its function is to accept the control signal sent by the controller and change the size of the controlled medium, so as to maintain the controlled variable at the required value or within a certain range. According to its energy form, actuators can be divided into three categories: pneumatic, hydraulic and electric. More and more factories are adopting automated control. Manual operation is replaced by machinery or automated equipment. People require the actuator to play the role of the interface between the control system and the mechanical movement of the valve, and the actuator is required to enhance the work safety performance and environment. Protection performance. In some dangerous situations, automated electric actuators can reduce personnel injuries.

 Its shell is light weight because it uses aluminum alloy. Moreover, the surface is treated by anodizing, and the surface is coated with polyester powder, which has strong corrosion resistance. The motor has a large output torque and a built-in thermal protection switch for temperature control to avoid damage to the motor. Actuating structure—When the power is off, the clutch handle can be moved manually for manual operation. When energized, the clutch resets actively. Orientation indicator—The indicator device is on the central axis and can investigate the valve orientation. And there are indicator lights to choose from. Dryer—used to control the temperature, avoid condensation of moisture inside the actuator, and keep the internal electrical components dry.

 The equipment must be stored in a clean, cool and dry area. The upper cover must be the equipment and the connection terminals must be sealed. The storage area must be elevated off the ground. The actuator must be operated carefully and accurately after being transported to the site, away from risky things. Under normal circumstances, it takes 6 months to make a repair inspection, but if the operating environment of the actuator is worse than the usual environment, it is recommended to increase the number of repairs. It is determined that the valve and the actuator have been adjusted, the wires have been insulated, and the terminals have been accurately connected and secure, the screws have been locked, the internal electrical structure has been cleaned, the wiring terminals have been accurately connected and kept dry, the internal condensing equipment, and the dryer power supply. Check if the "O" ring is sealed and if the "O" ring is damaged at the edge of the electric actuator. Check whether the organization of the brake clutch and the operation of the actuator switch are normal.

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