教你如何订购进口阀门
教你如何订购进口阀门进口阀门以质量过硬著称，如何订购进口阀门，本文用中英文对比的方式更加直观的教会你如何操作。
我们希望能够帮助您针对各种各样的管道环境选择正确的阀门。我们为您提供品种丰富的阀门供您选择。这些阀门在本网战中都有详细的介绍。
This catalog has been published to assist you in choosing the correct valve for a vast number of piping conditions. The Aloyco product line makes available to you a very broad choice of valves. These valves are described in this catalog.
在选择最适合您的用途的阀门时应该小心谨慎。为了避免含糊不清，应该对每一个阀门做出精确的规定。在询价或订购时，应该对所需要的阀门做出全面、适当的说明。
Care should be taken to select the most suitable valves for your service(s). Exact specification of each valve should be made to avoid possible ambiguity. When requesting quotations and/or ordering the product a fully adequate de＆#115;cription should be made.
选择阀门通径
Selecting the Valve Size
必须确定与阀门连接的管道的公称通径。
Nominal size of the pipeline into which the valve will be placed must be determined.
阀门材料
Valve Material
在决定正确的阀门材料时，应该考虑下列因素：
The following facts should be considered in determining the correct valve material:
·阀门所要控制的流体介质
·the medium or media which will be controlled
·流体介质的温度范围
·the temperature range of the line medium (media)
·阀门所要经受的压力范围
·the pressure range to which the valve will be subjected
·可能影响阀门工作的气候条件
·possible atmospheric conditions which may affect the valve
·阀门所要经受的、可能的异常压力或应力
·possible extraordinary stresses to which the valve will be subjected
·所要满足的安全标准或管道规程
·safety standards and/or piping codes which must be met
阀门类别
Type of Valve
阀门的控制功能是什么？每种阀门结构都是用于发挥某种功能。不要指望一种阀门能够担当整个管道系统内的所有功能。
What is the control function of the valve? Each valve configuration has been developed to perform certain control functions. Do not expect one type of valve to perform all the valving jobs in a system.
压力-温度额定值
Pressure-Temperature Ratings
为了满足实际需要，请特别注意所需阀门的压力-温度额定值。要特别注意密封材料和衬垫材料，这些材料相当程度上决定了阀门的压力-温度额定值。根据实际需要指定密封材料和沉淀材料，以满足或优于实际需求。
Please pay careful attention that the pressure-temperature ratings of a particular valve are in keeping with the requirements of the service. Pay especially careful attention to the packing and gasket materials as this may limit the rating as is the case with PTFE used as the standard in Aloyco valves. Specify alternative packing and/or gasket materials as necessary to meet or exceed your service requirements.
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