In valve selection, the application is everything. To ensure the best result, specifiers and users must closely consider relevant characteristics of the application that will determine future valve performance.
It is important to consider if the application is static or dynamic. In a static application, the set point of desired pressure, flow, etc., to be controlled by valve opening and closing remains fixed for the great majority of the time. For example, in leak testing, the valve applies a fixed pressure to a component, testing for soundness. This fixed set point pressure need change only when a different type of component is to be tested.
