ContentsEB 8091-1 EN 31 Safety instructions and measures ...................................................................51.1 Notes on possible severe personal injury .........................................................71.2 Notes on possible personal injury ...................................................................81.3 Notes on possible property damage ................................................................92 Markings on the control valve ......................................................................102.1 Body inscription ...........................................................................................102.2 Actuator nameplate......................................................................................112.3 Material number ..........................................................................................113 Design and principle of operation ................................................................123.1 Fail-safe positions ........................................................................................123.2 Versions ......................................................................................................143.3 Technical data .............................................................................................144 Measures for preparation ............................................................................204.1 Unpacking ..................................................................................................204.2 Transporting and lifting ................................................................................204.2.1 Transporting ................................................................................................204.2.2 Lifting..........................................................................................................204.3 Storage .......................................................................................................214.4 Preparation for installation ............................................................................215 Mounting and start-up .................................................................................235.1 Mounting the actuator onto the valve .............................................................235.2 Installing the valve into the pipeline ...............................................................235.2.1 Checking the installation conditions ...............................................................235.2.2 Additional fittings.........................................................................................255.2.3 Installing the control valve .............................................................................255.3 Quick check ................................................................................................266 Operation ...................................................................................................286.1 Working in manual mode .............................................................................287 Servicing.....................................................................................................307.1 Replacing the gasket ....................................................................................317.1.1 Standard version..........................................................................................317.1.2 Version with insulating section.......................................................................31