valve wrench

On-Line Inspection and Measurement Methods of the Leakage of Valves Based on the Acoustic Emission Technology;

基于声发射技术的阀门泄漏在线检测方法

Selection of valves in design of painting line;

涂装线设计中阀门的选型

Application of Maintenance Technique for New Valve in Long Distant Pipeline;

新阀门养护技术在长输管道建设中的应用

Use and study on valves in water supply engineering;

供水工程中阀门的使用与探讨

Comparing instrumentation valves and tube fittings with domestic and abroad;

国内外仪表阀门及管件现状分析

The sealing face form of valves inner sealing, using conditions of sealing face material and the selection principle, packing box structure of valves outer sealing and the selection of sealing packing are expounded together with the work principle and features of forced sealing and automatic sealing of bonnet.

结合石油化工装置所用阀门的特点 ,阐述了阀门内密封的密封面形式、密封面材料的使用条件及选用原则 ,阀门外密封的填料函结构形式及密封填料的选择 ;阀盖处的强制密封和自紧密封的工作原理及特

Welding standard research in manufacturing of the valve;

阀门焊接相关标准的讨论

Some wrong ways to maintain oil valves are analyzed.

列举了输油阀门在维修保养时的几种错误作法,如用砂纸、钢刷清除阀杆梯形螺纹锈迹;更新填料时旧填料末清除干净,填料的尺寸及安装不符合技术要求;未按规定期限对阀门进行技术鉴定和阀门材质选择不当、保养不及时,造成冬季阀门冻裂。