原文：
橡胶密封蝶阀缺点是作节流使用时，由于使用不当会产生气蚀，使橡胶座剥落、损伤等情况发生。为此，解决气蚀问题的新一代金属密封蝶阀诞生了。 a、 三偏心多层次金属硬密封蝶阀的蝶板密封圈为软硬层叠式金属片，具有金属密封和弹性密封的双重优点，无论在低温和高温情况下， 均具有优良的密封性能。 b、 采用三维偏心结构，阀座与蝶板几乎无磨擦，在关闭时阀门内部零件几乎无损伤；这种结构大大地提高了阀门在使用中的性能。且具有越关越紧的密封功能。 c、 在阀杆的上、下部位装有衬套，而每个衬套产生的磨损和摩擦阻力很小，这种结构xx可以防止磨损和粘连，同时也提高使用寿命。 d、 阀体密封面采用堆焊合金钢或司太立硬质合金，不锈钢硬密封蝶阀的密封面耐磨损，耐冲刷、耐腐蚀；使用寿命长。 e、 结构独特，开关力矩小，操作灵活、省力、方便、不受介质压力的高、低影响，密封性能可靠。可作启闭和调节设备用。

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译文：
Rubber seal butterfly valve for throttling disadvantage when used properly will have the use of cavitation to rubber seat falling off, injury from happening. Therefore, to solve the problem of a new generation of cavitation metal sealing butterfly valve was born. a, three eccentric multi-level metal seal butterfly valve plate seal for the hard and soft layering pieces of metal with a metal seal and the seal of the double advantage of flexibility, both in low and high temperature cases, all with excellent sealing performance. b, three-dimensional asymmetric structure, the valve seat and disc almost no friction, the internal parts in the valve closed almost no damage; This structure significantly improves the performance of the valve in use. The more relevant and has a more tight sealing function. c, the stem of the upper and lower parts with bushing, each bushing wear and friction generated by small, this structure can prevent wear and adhesion, but also enhance the service life. d, body sealing surface by welding steel or stellite alloy, stainless steel hard seal butterfly valve sealing surface wear resistance, erosion, corrosion; long service life. e, unique structure, switching torque is small, flexible operation, labor saving, convenient, free from media pressure, high, low-impact, reliable sealing performance. Can be used for opening and regulating equipment.