The small flow of small flow regulating valve means that Cv value is 0.05 or less. In many applications of industrial systems, precise control is required for a small amount of materials under normal pressure or a slightly large amount of materials under extreme high pressure difference. At this time, the calculated Cv value is very small, which can be used in the pilot test device with little output or in the industrial equipment that adds a small amount of reagents to a large amount of process fluid.

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