Connections for general use and fluid power - ports and stud ends with iso 261 threads with elastomeric or metal - to - metal sealing - part 2 : stud ends with elastomeric sealing type e 一般用途和流体动力用连接件.带弹性体密封件或金属对金属密封件的iso 261螺纹的孔口和螺柱端.第2部分:带弹性体密封件的螺柱端e型
Connections for general use and fluid power - ports and stud ends with iso 261 threads with elastomeric or metal - to - metal sealing - part 3 : stud ends with metal - to - metal sealing type b 一般用途和流体动力用连接件.带弹性体密封件或金属对金属密封件的iso 261螺纹的孔口和螺柱端.第3部分:带金属对金属密封件的螺柱端b型
Fire safe ? secondary metal - to - metal seal acts as backup if primary seal is destroyed by fire . valves ordered for compliance with api 607 will be provided with graphite packing and gaskets 氯气应用-可提供能够满足氯气协会第6小册子所列的全部标准和规定的阀门，包括通风球的预备，流向箭头，以及为了防止污染而进行的清洗和包装。
According to different requirements during designing dies for ceramics - metal sealing , the experiences and skills of selecting materials , tolerance on fit , and setting auxiliary sizes are summarized , and they are very helpful to make the design of dies more reasonable and to improve the sealing quality 摘要针对陶瓷金属封接模具设计的不同需要，从材料选择、配合公差以及辅助尺寸的确定等方面总结出几点经验和技巧，力求使模具设计更为合理，以保证封接质量。
Ball valves with metal sealing and additional soft sealing have been developed based on the results from a series of experiments conducted over many years , which , by means of an elastomer seat insert , guarantee 100 % sealing efficiency and reduce wear to a minimum , regardless of obstructive particles in the media 带金属密封和辅助的软密封的球阀是基于许多年进行的一系列试验的成果而开发出来的，借助于弹性密封圈，这种阀门可以保证100 %的密封效率，并使磨损减少到最低限度，无论介质中起阻碍作用的颗粒的性状如何。
With the development of the industrial technology , the general soft seal butterfly valve has not been satisfied with the demand in the industry , so the metal seal butterfly vavle has been developed . the tri - eccentric butterfly vavle is the most advanced during the butterfly valve development and evolvement . but , at present , the tri - eccentric butterfly valve has not been studied thoroughly at home , and has not been formed a perfect theory system , brought about the limitation of the tri - eccentric butterfly vavle in its development and application to a great extent 随着工业技术的发展，普通软密封蝶阀已满足不了工业上的需求，金属硬密封蝶阀很快被开发出来，而三偏心结构蝶阀是蝶阀发展、演化过程中最高级的一种，但是目前国内还没有对它作深入的研究，还没有形成一个比较完善的理论分析体系，致使三偏心蝶阀的发展及应用受到一定程度的限制。
