Contents
EB 8310-6 EN
6 Start-up .....................................................................................................6-1
6.1 Preloading the springs .................................................................................6-2
6.1.1 Tensioning the springs .................................................................................6-2
6.1.2 Increasing the actuator thrust .......................................................................6-3
6.1.3 Adapting the travel range ............................................................................6-4
6.2 Travel stop ..................................................................................................6-4
6.2.1 Bottom travel stop (minimum travel) ..............................................................6-4
6.2.2 Top travel stop (maximum travel) ..................................................................6-4
6.3 Version with handwheel ...............................................................................6-5
6.3.1 Extending the actuator stem manually ...........................................................6-6
6.3.2 Retracting the actuator stem manually ...........................................................6-6
7 Operation ..................................................................................................7-1
7.1 Throttling service .........................................................................................7-1
7.2 On/off service ............................................................................................7-1
7.3 Manual mode (versions with handwheel only) ...............................................7-2
7.4 Additional notes concerning operation .........................................................7-2
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-2
9 Service and conversion work ......................................................................9-1
9.1 Periodic testing ...........................................................................................9-2
9.2 Preparation for servicing or conversion work .................................................9-2
9.3 Mounting the actuator on the valve after servicing or conversion work ............9-3
9.4 Service work...............................................................................................9-3
9.4.1 Replacing the diaphragm ............................................................................9-3
9.4.2 Replacing the actuator stem seals .................................................................9-7
9.5 Conversion work .........................................................................................9-9
9.5.1 Reversing the direction of action (fail-safe action) ..........................................9-9
9.6 Ordering spare parts and operating supplies ..............................................9-12
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Removing the actuator from the valve .........................................................11-2
11.2 Relieving the spring compression in the actuator ..........................................11-2
12 Repairs ....................................................................................................12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal ...................................................................................................13-1
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