通径
Size

　　必须确定阀门所要安装的管路通径。《技术资料》样本中包含流量特性和管道性质的综合全面的参数。
　　Nominal size of the pipeline into which the valve will be placed must be determined. Comprehensive data on flow characteristic and pipe properties are contained in the Engineering Data Catalog.

阀门材料
Valve Material

　　在考虑确定正确的阀门材料是应该考虑下列因素。
　　The following facts should be considered in determining the correct valve material.

• 所控制的流体介质。
  The media to be controlled.
• 流体介质的温度。
  The temperature of the media.
• 影响阀门的可能的异常应力。
  The possible extraordinary stresses affecting the valve.
• 安全标准和/或管道标准。
  Safety standards and/or piping codes.

阀门种类
Type of Valve

　　如果花费几分钟的时间阅读第3和4页里的一些基本的阀门知识将会是很有帮助的。
　　A few minutes spent in reading some simple valve facts on pages 3 and 4 will prove helpful.

压力/温度等级
Pressure/Temperature Rating

　　请特别小心注意第32页里显示的“压力/温度等级”能够满足应用要求。
　　Please pay careful attention that the PRESSURE/TEMPERATURE RATINGS shown on page 32 in this catalog are in keeping with the requirements of the service.

阀门连接端口
Valve End Connections

　　应该考虑到管道的整体性，今后的维护，防腐蚀因素，现场装配，重量和安全等方面，以决定管路上阀门的连接方式。
　　Considerations as to pipeline integrity, future maintenance, corrosion factors, field assembly, weight and safety should be given in determining the method of connecting the valve in the pipeline.

　　警告：如果阀门的应用、拆卸或处置过程中包含石棉垫圈或填料，要避免从这些部件中吸入粉尘或纤维。石棉及其相关产品的处置应该遵守当地、州和联邦法律和相关规定。
　　CAUTION: When servicing, disassembling or disposing of valves containing asbestos gaskets or packing, avoid breathing dust or fibers from these parts. Disposal of asbestos and asbestos related products should comply with local, state and federal laws and regulations.

如何订购
Ordering Information

　　在订购时，请指定阀门通径和完整的产品规格型号，包括前缀和后缀，有关规格型号的含义请参阅下列网页中描述的常规项目及其说明。
　　Designate the valve size and the complete catalog number, including prefix and suffix letters, when applicable, to identify regular cataloged items as described on the following pages.
　　如果有特殊要求，如齿轮操作机构，马达执行机构，液动或气动缸体执行机构，耐摩擦轴承轭架套管，排泄旁路，等等，在订购时都必须特别注明。
　　Any special requirements such as Gear operation, Motor operation, Hydraulic or Pneumatic Cylinder operation, Anti-friction bearing yoke sleeve, By-Pass of drain, etc. must also be specified on purchase orders.