An in-line device in a fluid-flow system that can interrupt flow, regulate the rate of flow, or divert flow to another branch of the system. Source(s): NIST SP 800-82 Rev. 2
The Automation, Systems, and Instrumentation Dictionary
Comments about specific definitions should be sent to the authors of the linked Source publication. For NIST publications, an email is usually found within the document.
Comments about the glossary's presentation and functionality should be sent to email@example.com.