Many products need routine maintenance, which is very normal for us. For electric butterfly valves, whether it is necessary to do a good job in general market maintenance, many people are actually very concerned about this practical problem. Now let's make a comprehensive understanding of these, It is the most basic for us to really determine how to do the overall product maintenance when using the electric butterfly valve. Better maintenance of the product can improve its service life and ensure better use effect in the future.

As there are more and more control methods and means, there are many ways to control the pneumatic actuator in the practice of industrial production and industrial control.
1. Nominal diameter: (nominal diameter), also called mean outside diameter, indicating the symbol DN, which is the general diameter of various pipes and pipeline accessories. The pipes with the same nominal diameter and pipeline accessories can be connected with each other and are interchangeable. It is not the outer diameter or inner diameter of the pipeline in the practical sense, although its value is close to or equal to the inner diameter of the pipeline, in order to make the connection scale of pipes and pipe fittings consistent, the nominal diameter (also called the nominal diameter, the nominal diameter) is selected. For example, welded steel pipes can be divided into thin-walled steel pipes, general steel pipes and thickened steel pipes according to thickness. The nominal diameter is neither the outer diameter nor the inner diameter, but a nominal dimension similar to the inner diameter of ordinary steel pipes. Each nominal diameter corresponds to an outer diameter, and its inner diameter varies with thickness. Nominal diameter can be expressed in metric mm or in inch. Pipe accessories are also indicated by nominal diameter, which has the same meaning as slotted pipe.