Samson 42-20, Mounting And Operating Instructions

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Contents
EB 3007 EN
8 Malfunctions .............................................................................................. 8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2
Emergency action .......................................................................................8-3
9 Servicing .................................................................................................... 9-1
9.1 Preparing the valve for service work .............................................................9-5
9.2 Installing the regulator after service work ......................................................9-5
9.3 Service work...............................................................................................9-5
9.4 Replacing the actuator .................................................................................9-6
9.5 Replacing the seat and plug .........................................................................9-6
9.6 Replacing the actuator's operating diaphragm ..............................................9-6
9.6.1 Type 2420 Actuator ....................................................................................9-6
9.6.2 Type 2425 Actuator ....................................................................................9-7
9.7 Ordering spare parts and operating supplies ................................................9-8
10 Decommissioning ..................................................................................... 10-1
11 Removal .................................................................................................. 11-1
11.1 Removing the regulator from the pipeline ....................................................11-1
11.2 Removing the actuator from the valve .........................................................11-1
12 Repairs .................................................................................................... 12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal ................................................................................................... 13-1
14 Certificates ............................................................................................... 14-1
15 Annex ...................................................................................................... 15-1
15.1 Tightening torques .....................................................................................15-1
15.2 Lubricant ..................................................................................................15-1
15.3 Tools ........................................................................................................15-1
15.4 Accessories ..............................................................................................15-1
15.5
Spare parts ..............................................................................................15-2
15.6 After-sales service .....................................................................................15-6