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.
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
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.
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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