What are the specific systems of the valve electric device

阀门电动执行器标准体系是指将全行业面对市场需求和针对行业企业产品生产及新产品开发中，有利于制造与使用双方所需全部标准的综合，使各项标准之间在适用对象、范围和内容等方面相互关联、相互协调、相互制约。标准体系是合理覆盖全行业生产和技术的科学有机体，同时也要考虑到与各相关领域的衔接与配合。

The valve electric device standard system refers to when the whole industry facing the demand of the market, for the production of enterprises and the development of new products in the industry, in this way can benefit all the standards required for the manufacture and use of both parties. To interrelate, coordinate and restrict each other in the applicable objects, scope and content. The standard system is a scientific organism that reasonably covers the entire industry's production and technology. It also needs to consider the convergence and cooperation with related fields.

目前，我国阀门电动执行器的标准体系主要由五个部分组成，体系结构框架如下：

At present, the standard system of valve electric devices in China is mainly composed of five parts. The frame of the system structure is as follows:

部分是方法标准，包括性能试验、寿命试验以及探伤试验等标准。

The first part is the method standard, including the performance test, life test and flaw detection test.

第二部分是产品标准。基本上是按阀门电动执行器结构分类而确定的，分为国家标准和行业标准。包括闸阀、截止阀、球阀、旋塞阀、蝶阀、隔膜阀、疏水阀、特种阀门电动执行器、驱动装置等标准。

The second part is the product standard. Basically, it is determined according to the classification of valve electric device structure, and is divided into national standards and industry standards. Including gate valve, globe valve, ball valve, plug valve, butterfly valve, diaphragm valve, steam trap, special valve electric device, drive device and other standards.

第三部分是零部件标准。为产品标准配套使用的零部件标准，以行业标准为主;包括阀杆螺母、填料、填料压盖等零部件。

The third part is the part standard. The standard of parts and components which used for supporting the product standards is based on industry standards; it includes stem nuts, packings, packing glands and other parts.

第四部分是基础标准，主要适用于各工业领域用阀门电动执行器，以国家标准为主。包括术语、标志、结构长度、型号编制等标准。
The fourth part is the basic standard, which is mainly applicable to valve electric devices in various industrial fields, based on national standards. Including terms, signs, structure length, model preparation and other standards.

第五部分是材料标准，包括钢制材料、铁制材料和有色金属等材料标准。
The fifth part is the material standards, including steel materials, iron materials and nonferrous metal and other materials standards.