What are the specific systems of the valve electric device

閥門電動執行器標準體系是指將全行業面對市場需求和針對行業企業產品生產及新產品開發中，有利于制造與使用雙方所需全部標準的綜合，使各項標準之間在適用對象、范圍和內容等方面相互關聯、相互協調、相互制約。標準體系是合理覆蓋全行業生產和技術的科學有機體，同時也要考慮到與各相關領域的銜接與配合。

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，我國閥門電動執行器的標準體系主要由五個部分組成，體系結構框架如下：

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:

部分是方法標準，包括性能試驗、壽命試驗以及探傷試驗等標準。

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

第二部分是產品標準。基本上是按閥門電動執行器結構分類而確定的，分為國家標準和行業標準。包括閘閥、截止閥、球閥、旋塞閥、蝶閥、隔膜閥、疏水閥、特種閥門電動執行器、驅動裝置等標準。

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.

第三部分是零部件標準。為產品標準配套使用的零部件標準，以行業標準為主;包括閥桿螺母、填料、填料壓蓋等零部件。

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.

第四部分是基礎標準，主要適用于各工業領域用閥門電動執行器，以國家標準為主。包括術語、標志、結構長度、型號編制等標準。
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.

第五部分是材料標準，包括鋼制材料、鐵制材料和有色金屬等材料標準。
The fifth part is the material standards, including steel materials, iron materials and nonferrous metal and other materials standards.