In the industrial field, the actuator usually refers to the device used to control the valve. Actuators are usually used in conjunction with valves to open, close, or adjust the position or opening of the valve to control the flow of fluid (liquid, gas, or steam) in the pipeline. The actuator can be

1, the switch action of the actuator is driven by the air source, which is called DOUBLEACTING(double acting). Take DA series pneumatic actuator as an example: the output torque of gear bar actuator is obtained by the piston pressure (supplied by the air source pressure) multiplied by the upper pitch circle radius (lever). And low friction resistance and high efficiency. The output torque is linear for both clockwise and counterclockwise rotation. Under normal operating conditions, the recommended safety factor of the double-acting actuator is 25-50%.

Under normal circumstances, if it is not tightly closed, first confirm whether the valve is closed in place, if it has been closed in place, there is still a leak can not be sealed, then check the sealing surface. The sealing pair of some valves is removable, so take it out for grinding and testing

With the rapid development of China's industry, pneumatic valves in metallurgy, petrochemical and other fields are more and more widely used, its stability, reliability is also becoming more and more important, its working status will directly affect the automatic control process, Xiaobian will elab