原文：
硬密封球阀为偏心金属密封结构,密封形式为金属对金属密封,可调换金属密封圈对金属密封,不锈钢板与石墨复合板密封圈对金属密封.硬密封蝶阀的驱动形式除了电动之外还有：手动,蜗轮杆传动,气动等。 硬密封球阀的蝶板安装于管道的直径方向。在硬密封球阀阀体圆柱形通道内，圆盘形蝶板绕着轴线旋转，旋转角度为0°~90°之间，旋转到90°时，阀门则牌全开状态。 新型高寿命不锈钢蝶阀的特点以及蝶阀在使用过程中存在问题 目前,硬密封球阀,硬密封蝶阀作为一种用来实现管路系统通断及流量控制的部件，已在石油、化工、冶金、水电等许多领域中得到极为广泛地应用。在已公知的蝶阀技术中，其密封形式多采用密封结构，密封材料为橡胶、聚四氟乙烯等。由于结构特征的限制，不适应耐高温、高压及耐腐蚀、抗磨损等行业。现有一种比较先进的蝶阀是三偏心金属硬密封蝶阀，阀体和阀座为连体构件， 阀座密封表面层堆焊耐温、耐蚀合金材料。多层软叠式密封圈固定在阀板上，这种蝶阀与传统蝶阀相比具有耐高温，操作轻便，启闭无磨擦，关闭时随着传动机构的力矩增大来补偿密封，提高了蝶阀的密封性能及延长使用寿命的优点。

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译文：
Ball Valve structure for the eccentric seal, seal the form of metal on metal seal, replaceable metal ring on the metal seal, Stainless steel and graphite composite sheet metal seal ring. Hard seal butterfly valve electric drive form in addition to outside are: manual, worm gear lever transmission, pneumatic. Butterfly Ball Valve plate installed in the pipe diameter direction. In the hard seal ball valve cylindrical channel, the disc-shaped disc around the axis of rotation, rotation angle 0 ° ~ 90 ° between the rotation to 90 °, the valve is open all license conditions. New features of the high life of stainless steel butterfly valve and valve problems in the course of At present, the hard seal ball valve, hard seal butterfly valve as a piping system used to implement off and flow control components, has been in the petroleum, chemical industry, metallurgy, water, electricity and many areas are very widely used. The butterfly valve has been publicly known in the technology, the seal forms enclosed structure, sealing material for the rubber, PTFE and so on. As the structure of the restrictions, not suited to high temperature, high pressure and corrosion resistance, wear and other industries. Present a more advanced three eccentric butterfly valve is metal seal butterfly valve, valve and seat components for the piece, the valve seat sealing surface layer welding temperature, corrosion resistant alloy material. Stacked multi-layer soft ring fixed in the valve plate, this butterfly has a high temperature compared with the traditional butterfly valve, easy to operate, open and close without friction, closed with the drive mechanism to compensate for increased seal torque and improve a valve sealing performance and durability advantages.