4 EB 8091-1 ENContents7.1.3 Version with bellows seal ..............................................................................347.2 Replacing the packing ..................................................................................367.3 Replacing the seat and plug ..........................................................................387.3.1 Standard version..........................................................................................387.3.2 Version with insulating section.......................................................................397.4 Preparation for return shipment .....................................................................407.5 Ordering spare parts and operating supplies .................................................418 Malfunctions ...............................................................................................428.1 Troubleshooting ...........................................................................................428.2 Emergency action ........................................................................................439 Decommissioning and disassembly ..............................................................449.1 Decommissioning .........................................................................................449.2 Removing the valve from the pipeline .............................................................449.3 Removing the actuator from the valve ............................................................459.4 Disposal ......................................................................................................4510 Appendix....................................................................................................4510.1 After-sales service ........................................................................................4510.2 Spare parts .................................................................................................46