原文：
随着其型式试验在合肥通用机械研究所获得通过，这种大口径全铸型蝶阀填补了国内设计制造上的一项空白。 蝶阀广泛应用于给排水、电力、燃气、化工等诸多领域，常用口径一般在2.2米以下，超过这个数字的被称为非标产品，需要进行特殊的设计制造。此前国内全铸型蝶阀只研制出口径达到3米的，而 郑蝶公司的这种新产品口径达到了3.6米。 据介绍，在工艺上，和全铸型蝶阀相对的是钢板焊接蝶阀，为国外生产厂家广泛采用，但在防变形的刚性上和防腐性上不如郑蝶公司等我国企业生产的全铸型蝶阀。 郑蝶公司此次研制的3.6米大口径蝶阀， 是为上海世博会引水工程“量身定做”的，其通过流量可以达到每小时13万立方米。

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译文：
With its type in the Hefei General Machinery Research Institute test is passed, this large diameter butterfly valve to fill the entire cast on the domestic design and manufacture of a blank. Butterfly valve is widely used in water supply and drainage, electricity, gas, chemical and many other fields, often in the 2.2 m diameter generally less than this figure is called non-standard products, the need for special design and manufacturing. Full cast butterfly after China developed only up to 3 m diameter, while Zheng butterfly's caliber to this new product has reached 3.6 meters. It is reported on in the process, and the whole cast is relatively butterfly valve plate welding, widely used for foreign manufacturers, but the rigidity of the anti-deformation and corrosion of the butterfly as Zheng production companies, the entire cast of China type valve. The company developed Zheng butterflies and 3.6 meters of large diameter butterfly valve, is the Shanghai World Expo Water Diversion Project "tailor", and its flow can be achieved by 130,000 cubic meters per hour.