Lockout Shutoff Valve A shutoff valve designed so that it can be secured in the closed position. See also PEI/RP700. By rhys|2014-10-21T15:39:33+00:00October 21st, 2014|Comments Off on Lockout Shutoff Valve Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: rhys