1、使用特性。它確定了閥門的主要使用性能和使用范圍。屬于閥門使用特性的有：
1. Use properties. It determines the main performance and scope of use of the valve. The service characteristics of valves include:
閥門的類別(閉路閥門、調(diào)節(jié)閥門、閥門等)；
Type of valve (closed-circuit valve, regulating valve, valve, etc.);
產(chǎn)品類型(閘閥、截止閥、蝶閥、球閥等)；
Product type (gate valve, globe valve, butterfly valve, ball valve, etc.);
閥門主要零件(閥體、閥蓋、閥桿、閥瓣、密封面)的材料；
Materials of main parts of the valve (valve body, bonnet, valve rod, valve disc and sealing surface);
閥門傳動(dòng)方式等。
Valve transmission mode, etc.
2、結(jié)構(gòu)特性。它確定了閥門的安裝、維修、保養(yǎng)等方法的一些結(jié)構(gòu)特征。屬于結(jié)構(gòu)特征的有：
2. Structural properties. It determines some structural features of valve installation, repair, maintenance and other methods. Structural features include:
閥門的結(jié)構(gòu)長(zhǎng)度和總體高度、與管道的連接形式(法蘭連接、螺紋連接、夾箍連接、外螺紋連接、焊接端連接等)；
The structural length and overall height of the valve, and the connection form with the pipeline (flange connection, threaded connection, clamp connection, external thread connection, welded end connection, etc.);
密封面的形式(鑲?cè)Α⒙菁y圈、堆焊、噴焊、閥體本身加工出);
Form of sealing surface (insert ring, threaded ring, surfacing, spray welding, and processed by the valve body itself);
閥桿結(jié)構(gòu)形式(旋轉(zhuǎn)桿、升降桿)等。
Valve stem structure (rotating rod, lifting rod), etc.
在某些情況下使用特性和結(jié)構(gòu)特性是相互聯(lián)系的，是不能截然分開的
In some cases, service characteristics and structural characteristics are interrelated and cannot be completely separated
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