System for evaluating the flow performance characteristics of a device

摘要

A system for determining the flow performance of a valve by first measuring certain flow parameters of the valve with the stem fixed in a plurality of different positions between full open and full closed and then calculating a value of flow coefficient for each. The flow parameters of the valve are then measured with the stem dynamically moving under a plurality of different flow conditions. Mathematical relationships are derived in accordance with certain procedures for calculating the flow rate of the valve under each of the different flow conditions.