Samson 3277 Mounting And Operating Instructions page 4

Contents
6 Operation ...................................................................................................26
6.1 Throttling service ..........................................................................................26
6.2 On/off service .............................................................................................26
6.3 Manual mode ..............................................................................................26
6.4 Additional notes concerning operation ..........................................................27
6.5 Reversal of the direction of action ..................................................................27
6.5.1 Reversal of the direction of action from stem extends to stem retracts ................27
6.5.2 Reversal of the direction of action from stem retracts to stem extends ................30
6.6 Version with handwheel ................................................................................31
6.6.1 Extending the actuator stem manually ............................................................32
6.6.2 Retracting the actuator stem manually ............................................................32
6.7 Travel stop ...................................................................................................32
6.7.1 Bottom travel stop (minimum travel) ...............................................................32
6.7.2 Top travel stop (maximum travel) ...................................................................33
7 Servicing.....................................................................................................34
7.1 Replacing the diaphragm .............................................................................35
7.2 Replacing the actuator stem seals ..................................................................37
7.3 Preparation for return shipment .....................................................................39
7.4 Ordering spare parts and operating supplies .................................................39
8 Malfunctions ...............................................................................................40
9 Decommissioning and disassembly ..............................................................41
9.1 Decommissioning .........................................................................................41
9.2 Removing the actuator from the valve ............................................................41
9.3 Relieving the spring compression in the actuator .............................................41
9.4 Disposal ......................................................................................................42
10 Annex.........................................................................................................43
10.1 After-sales service ........................................................................................43
10.2 Spare parts .................................................................................................44
4 EB 8310-5 EN