Samson 3372 - Page 4

Contents
EB 8313-3 EN
6.3 Version with handwheel ...............................................................................6-5
6.3.1 Operating the handwheel of version with "stem extends" direction of action ....6-5
6.3.2 Operating the handwheel of version with "stem retracts" direction of action .....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 Preparing the valve for service work .............................................................9-3
9.3 Mount the valve after service work ...............................................................9-3
9.4 Service work...............................................................................................9-6
9.4.1 Replacing the diaphragm ............................................................................9-6
9.4.2 Replacing the actuator stem seals .................................................................9-8
9.5 Conversion work .......................................................................................9-12
9.5.1 Reversing the direction of action (fail-safe action) ........................................9-12
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 ..........................................11-3
12 Repairs ....................................................................................................12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal ...................................................................................................13-1
14 Certicates ...............................................................................................14-1
15 Annex......................................................................................................15-1
15.1 Tightening torques, lubricants and tools ......................................................15-1
15.2 Spare parts ..............................................................................................15-1
15.3 After-sales service .....................................................................................15-6