Preparing The Valve For Service Work; Installing The Valve After Service Work; Service Work - Samson 3351 Mounting And Operating Instructions

Servicing
9.2 Preparing the valve for

service work

1. Lay out the necessary material and tools
to have them ready for the service work.
2. Put the control valve out of operation (see
the 'Decommissioning' section).
Tip
We recommend removing the valve from the
pipeline before performing any service work
(see the 'Removal' section).
3. DN 15 to 80/NPS ½ to 3: lay out
mounting fixture (see Fig. 9-2 and 'Tight-
ening torques, lubricants and tools' sec-
tion in the annex). The mounting fixture
is required to remove and mount the pre-
loaded spring (5.5) in the actuator.
9.3 Installing the valve after
service work
1. If the valve has been removed, re-install
the valve into the pipeline (see the 'Instal-
lation' section).
2. Put the control valve back into operation
(see the 'Start-up' section). Observe the
requirements and conditions for start-up
or putting the valve back into operation.
9.4 Service work
Î Before performing any service work,
preparations must be made to the control
valve (see section 9.2).
9-4
Î After all service work is completed, check
the control valve before putting it back
into operation (see 'Testing the installed
valve' in the 'Installation' section).
Note
The procedures to disassemble the fail-close
and fail-open valve are not the same as the
plug is located differently in the valves.
EB 8039 EN