译文：
一 概述 目前阀门中的二片式金属密封球阀，主要采用左右阀体构成球阀的外形，其密封结构都是采用两个独立的阀座进行密封。由于阀座与阀体之间是采用间隙配合，且阀座底端与阀体之间必须采用密封材料进行密封，这样所有需要密封的部位都有可能出现泄漏的现象，且阀座周围的间隙给管道内传输介质提供了磨损、腐蚀和积聚的条件。球阀在作开关运动的过程中。阀座底端的密封材料各位置的压紧程度会有所变化，亦会造成一些部位因渗进介质而引起泄漏，严重地影响阀门长时间正常运行，使阀座及其底端的密封结构过早损坏。由于泄漏点较多，阀门的使用寿命普遍较短，通常不能满足用户的使用要求，只能频繁更换球阀维持系统的运行。 二 改进 2.1 结构 单向金属密封球阀(图1)主要零件有左阀体(包含一体化阀座)、右阀体、球体、右阀座、弹性垫和阀杆等，左阀体上与球体接触部分，堆焊司太立合金或采用超音速喷涂金属粒子。获得超硬喷涂层，并直接在其上做出一体化阀座密封面。球体亦采用超音速喷涂表面硬化技术。右阀座不起密封作用，无需进行表面硬化处理。弹性垫可以采用柔性石墨，亦可采用碟形弹簧。 2.2 工作原理 单向金属密封球阀是在普通的二片式金属密封球阀(图2)的基础上进行改进。将左阀座与左阀体连在一起构成一体化阀座。球体与左阀体中的一体化阀座构成密封副。球阀在管道上的安装具有方向性，左端与下游管道连接，右端与上游管道连接。球体通过上游管道的介质压力及来自右阀座底端的弹性垫预紧推力的共同作用，使球体贴紧左阀体中的一体化阀座，形成密封副而达到球阀的密封。右阀座只对球体起导向及预紧作用。由于采用一体化阀座，既减少了球阀的零部件数量，又减少了密封件之间的泄漏点，这样的一体化阀座杜绝了介质在阀座周围的泄漏。结构简单，密封性能优越，能够真正实现球阀的零泄漏。此结构球阀非常适合于特殊工况及固体颗粒或粉尘等场合下使用。 三 加工 球阀中球体与左阀体中的一体化阀座构成的密封副，需经硬化处理。且必须配对研磨，使其形成不间断的密封带，从而使球阀实现零泄漏。右阀座在球阀中没有密封要求，精度要求低，因此无需进行配对研磨，且不用进行硬化处理。此产品加工容易。很适合于大批量生产。 四 结语 单向金属密封球阀，结构紧凑，零部件少，外型美观，泄漏点少，实现了零泄漏，节约了成本。由于右阀座底端有弹性垫，因此阀门的开关力矩小，使用寿命大大提高。该产品已获得国家专利(专利号：ZL03265386．7)。产品已广泛应用于冶金、造纸、钢铁及火电系统等行业，性能良好。 　

“ Improvement of one-way valve metal seal”是由提供的国际阀门新闻，译文仅供参考。另外，中国球阀网还提供相关产品搜索：、、、、等。

原文：
1 Overview The current valve in the two metal sealing ball valve, mainly about body shape constitutes a ball, its sealed structure are based on two separate valve seat seal. As the valve seat and valve clearance fit between the use of, and the seat bottom and the valve body seal materials must be used between the seal, so that all need to seal the site are likely to experience the phenomenon of leakage, and the gap around the valve seat pipeline transmission medium to provide a wear and tear, corrosion and accumulation conditions. Ball in making the process of switching movements. The valve seat seal material at the bottom of the compaction degree of each position will change, they may cause some parts infiltrated the media, caused by leakage, which seriously affect the normal operation of the valve a long time, so that the bottom of the valve seat and the sealing structure over Early damage. As the leakage points more, the life of the valve generally short, usually can not meet the user's requirements, can only be frequent replacement valve to maintain operation of the system. 2 Improvement 2.1 Structure of A one-way metal sealing ball valve (Figure 1) the main parts are the left valve (with integrated seat), right valve, ball, right seat, elastic pads and stem, etc., the left part of body contact with the ball, welding stellite alloy or using supersonic spray of metal particles. Access to super-hard coating layer, and directly made in its integration of the valve seat sealing surface. Ball also uses supersonic spray surface hardening techniques. Can not afford the right valve seat sealing role, without the need for surface hardening treatment. Elastic cushion can be used flexible graphite can be used to disc springs. 2.2 Working Principle Metal seal is a one-way valve normal 2-type metal seal valve (Figure 2) based on the improvements. The left seat and left body together constitute the integrated valve seat. Sphere and in the integration of the left valve seat constitutes a seal pair. Ball valve in the pipe installation with a directional left and downstream piping connected to the upper right-hand side with the pipe connection. Sphere through the media pressure and the upstream channels from the right seat at the bottom of the elastic cushion preload thrust together, so that closely aligns the sphere of integration of the left valve seat to form a seal to achieve the valve seal, deputy. Sphere from the right seat only for the role of guidance and preload. As a result of integration of the valve seat, reducing the number of ball valve components, but also reduces the leakage between the sealing point, so that the integration of the valve seat to prevent the media around the leak in the valve seat. Simple structure, excellent sealing performance, can really achieve zero leakage valve. This structure is very suitable for ball valves for special working conditions and solid particles or dust and other occasions to use. 3 Processing Valve in the sphere of integration with the left valve seat formed in the seal pair, subject to hardening. Grinding and must be paired to form a continuous sealing tape, so that valve to achieve zero leakage. The right seat in the valve is not sealing requirements, precision is low, there is no need for paired grinding, and do not be hardened. This product is easily processed. Is very suitable for mass production. 4 Conclusion A one-way metal seal valve, compact structure, fewer parts, good looks, the leak less to achieve zero leakage, save costs. As the right seat at the bottom of a flexible pad, so the valve switching torque is small, life greatly improved. The product has obtained national patent (patent number: ZL03265386.7). Products have been widely used in metallurgy, paper, steel and thermal power systems industry, good performance.