Samson 42-34 Mounting And Operating Instructions page 4

Contents
7 Operation ..................................................................................................7-1
7.1 Adjusting the set points ................................................................................7-1
7.1.1 Adjusting the differential pressure set point ...................................................7-1
7.1.2 Adjusting the flow limitation .........................................................................7-3
7.1.3 Based on a known plant pressure drop .........................................................7-4
7.1.4 Based on an unknown plant pressure drop ....................................................7-4
7.2 Pressure conditions in the plant and at the regulator .......................................7-5
7.3 Sample application .....................................................................................7-6
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 .............................................................9-6
9.2 Installing the regulator after service work ......................................................9-6
9.3 Service work...............................................................................................9-6
9.4 Replacing the actuator .................................................................................9-6
9.5 Replacing the seat and plug .........................................................................9-7
9.6 Exchanging the operating diaphragm unit in the actuator ..............................9-7
9.6.1 Type 2428 Actuator ....................................................................................9-7
9.6.2 Type 2424 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 Lubricants .................................................................................................15-1
15.3 Tools ........................................................................................................15-1
15.4 Accessories ..............................................................................................15-1
15.5 Spare parts ..............................................................................................15-2
15.6 After-sales service .....................................................................................15-8
EB 3013 EN