Includes insights on valve sizing@ smart (digital) valve positioners@ field-based architecture@ network system technology@ and control loop performance evaluation. Hans Baumann@ a holder of more than 150 patents@ and author of over a hundred publications in control valve technology@ shares his expertise on designing control loops and selecting final control elements. The easy-to-read text provides shortcuts through complex sizing and noise calculation formulas including for liquids and cavitation@ and gives practical advice on how to apply control valves for safety@ reduced energy costs@ loop stability@ and easy maintenance.