4 EB 8823 ENContents7.2 Compact version ..........................................................................................407.2.1 Replacing the O-rings ..................................................................................407.2.2 Replacing the packing ..................................................................................407.2.3 Replacing the seat and plug ..........................................................................427.2.4 Tools and tightening torques..........................................................................447.3 Preparation for return shipment .....................................................................447.4 Ordering spare parts and operating supplies .................................................458 Malfunctions ...............................................................................................468.1 Troubleshooting ...........................................................................................468.2 Emergency action ........................................................................................479 Decommissioning and disassembly ..............................................................489.1 Decommissioning .........................................................................................489.2 Removing the valve from the pipeline .............................................................489.3 Removing the actuator from the valve ............................................................499.4 Disposal ......................................................................................................4910 Appendix....................................................................................................5010.1 Customer inquiries .......................................................................................5010.2 Certificates ..................................................................................................5010.3 Spare parts .................................................................................................52