Samson 3251-E - Page 4

Contents
EB 8052-E EN
5.4.1 Leak test ...................................................................................................5-16
5.4.2 Travel motion ............................................................................................5-18
5.4.3 Fail-safe position .......................................................................................5-18
5.4.4 Pressure test ..............................................................................................5-18
6 Start-up .....................................................................................................6-1
7 Operation ..................................................................................................7-1
7.1 Normal operation .......................................................................................7-2
7.2 Manual operation .......................................................................................7-2
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-2
9 Servicing and conversion ............................................................................9-1
9.1 Periodic testing ...........................................................................................9-3
9.2 Preparation for servicing or conversion work .................................................9-5
9.3 Mounting the actuator on the valve after service or conversion work ...............9-6
9.4 Service or conversion work ........................................................................9-10
9.4.1 Replacing the gaskets ................................................................................9-10
a) Version with clamped-in seat and plug .......................................................9-10
b) Version with screwed-in seat and plug ........................................................9-11
c) Version with cage and piston .....................................................................9-13
9.4.2 Replacing the packing ...............................................................................9-13
a) Standard and HT packing ..........................................................................9-13
b) LLF20 packing .........................................................................................9-15
9.4.3 Replacing the trim .....................................................................................9-18
a) Removing the (clamped-in) seat and plug ....................................................9-18
b) Removing the (screwed-in) seat and plug ....................................................9-19
c) Removing the cage and piston ...................................................................9-21
d) Installing the (clamped-in) seat and plug .....................................................9-22
e) Installing the (screwed-in) seat and plug ......................................................9-23
f) Installing the cage and piston .....................................................................9-25
9.5 Ordering spare parts and operating supplies ..............................................9-27
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Removing the valve from the pipeline ..........................................................11-2
11.2 Removing the actuator from the valve .........................................................11-2