Control Valve Rangeability vs Process Turndown: Verify the Real Operating Envelope
Understand why control valve inherent rangeability does not automatically guarantee process turndown. Verify minimum, normal and maximum flow, usable travel, installed characteristic and mechanical resolution.
Equal Percentage vs Linear Control Valve: Inherent vs Installed Characteristics
Learn how equal-percentage and linear control valve characteristics change after installation, how rangeability differs from process turndown, and how to select the correct trim from system pressure drop and predicted travel.