The fundamental actuator is used to drive the valve to a fully open or fully closed position. The actuator used to control the valve can accurately move the valve to any position. Although most of the actuators are used to open and close valves, today's actuator planning goes far beyond simple switching functions. They include orientation sensing equipment, torque sensing equipment, electrode protection equipment, logic control equipment, and digital communication modules. And PID control modules, and these devices are all installed in a compact enclosure.
As more and more factories adopt automatic control and manual operations are replaced by machinery or automation equipment, people require that the actuator can play the role of the interface between the control system and the mechanical movement of the valve, and they also require the actuator to enhance the safety performance of the operation and Environmental protection performance. In some risky situations, automated actuator equipment can reduce personnel injuries.
Some special valves require urgent opening or closing under special circumstances, and the valve actuator can prevent the risk from spreading further to minimize plant losses. For some high-pressure large-caliber valves, the required output torque of the actuator is very large. At this time, it is necessary for the required actuator to improve the mechanical efficiency and use a high-output motor, so that it can operate the large-caliber valve smoothly. Regarding some small torque valves, small and compact electric valves are also used. Compared with ordinary types, they have light weight, compact structure, and complete functions.
The main strengths of electric actuators are high stability and stable thrust that users can use. The maximum thrust of the actuator can reach 225000kgf. As long as the hydraulic actuator can reach such a large thrust, the cost of the hydraulic actuator is higher than Electric is much higher.
The anti-violation ability of the electric actuator is very good. The output thrust or torque is basically stable. It can overcome the unbalanced force of the medium and reach the precise control of the process parameters. Therefore, the control accuracy is better than that of the pneumatic actuator. high. If equipped with a servo amplifier, it can easily complete the exchange of positive and negative effects, and it can also easily set the status of the break signal valve position (persistent / full open / full close). When there is a problem, it must stay in place. This is pneumatic Actuators can't do it, pneumatic actuators need to use a combined protection system to complete the retention.
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