以下为句子列表：
英文: A butter fly valve is generally 40% the cost of an iron gate. Not only low initial cost but low installation costs also. 中文: 一个蝶阀的成本通常只有铸铁闸阀的40%，不但购买成本低，而且安装成本也比较低。 更详细...
英文: A set of performance reliable products.such as type DBflanged butter fly valve,wafer butter fly valve and check valve ar widely applied to petrochemical industry. 中文: DB型法兰蝶阀、对夹蝶阀、止回阀等一批性能可靠的产品广泛应用于石化工行业。 更详细...
英文: Check valve and butter fly valve combinations are very popular; normally a short spool piece is required between the valves. 中文: 止回阀和蝶阀组装是很常见的，通常需要在阀门之间增加一段短管。 更详细...
英文: For the larger ball valves, as well as all butter fly valves, the appropriate butter fly valve handle and index plate are supplied for manual operation of the stem extensions. 中文: 对于用在所有球阀上的阀杆加长件，应该采用29240018齿轮操作机构和29241014驱动套管。 更详细...
英文: Hsieh Yu butter fly valve is designed for installation with square screw, nut and washer. 中文: 协羽的蝶阀安装设计是使用方形螺丝，螺母及华司所组成。 更详细...
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