Select the valve size combinations from SIZING CHART that is within low to high flow system range.
在最低到最高流量范围内，从通径图表中选择阀门通径。
Select the valve size from SIZING CHART that is within the range of low to high flow. (Consider requirements of lowest demand equipment.)
在最低到最高流量范围内，从通径图表中选择阀门通径。(考虑最低需要设备的要求。)
The second step is to select the closure may be required to meet the speed of the check valve type.
第二步是选择可能满足所需要的关闭速度的止回阀类型。
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