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25/09/2014
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A:
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Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
“Trim” is the size of the insert that limits the flow to a specific value. For example, If I have a 1 inch control valve body with a ½ inch trim, it will provide a specific pressure drop at a specific flow rate. If I replace the trim with a ¾ inch trim, the pressure drop will be lower at the same flow rate.
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