本手册中包含的信息有助于操作员、技术人员和工程师基本了解手动和自动刀闸阀的使用和应用。刀闸阀的许多变体可能超出本手册的范围，需要与制造商进行特别协商，以确定相关的应用要求。阀门的操作和设计信息是通用的，在最终选择任何类型的刀闸阀及其选项之前，应获得预期阀门制造商的实际数据。本手册补充了最新版ANSI/AWWA标准C520中所列刀闸阀的信息:尺寸为2英寸的刀闸阀。（50毫米）至96英寸。（2400毫米）。

Information contained in this manual is useful for operators, technicians, and engineers to gain a basic understanding of the use and application of manual and automated knife gate valves. There are many variations of knife gate valves that may exceed the scope of this manual and require special consultations with the manufacturer to determine the associated application requirements. The valves' operational and design information is generic, and actual data from the intended valve manufacturer should be obtained before making the final selection of any type of knife gate valve and its options. This manual supplements information on the knife gate valves listed in ANSI/AWWA Standard C520 of latest edition: Knife Gate Valves, Sizes 2 in. (50 mm) Through 96 in. (2,400 mm).