Samson EB 8015 EN User Manual

9-8 EB 8015 EN
Servicing
9.2 Service work preparations
Risk of personal injury due to incorrect re-
moval of the anti-rotation xture under ten-
sion.
Once the actuator has been mounted on the
valve and the assembly is ready for use, the
clamps (301) of the anti-rotation xture on
the plug stem are under tension.
Î Follow the instructions in this document
during mounting or removal.
Î Do not loosen the screws (303) of the an-
ti-rotation xture while the force generat-
ed by the supply air and/or the actuator
springs is transmitted to the actuator stem
and the stem (9).
Î First remove the actuator from the valve
or ensure it cannot transmit any forces to
the actuator stem before removing the
anti-rotation xture on the plug stem.
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' chapter).
3. Remove the actuator from the valve. See
associated actuator documentation.
To remove an actuator with "stem extends"
fail-safe action and/or with preloaded
springs, a certain signal pressure must be
applied to the actuator (see associated actu-
ator documentation). Afterwards, the signal
pressure must be removed and the air supply
disconnected again and locked.
SAMSON recommends removing the valve
from the pipeline before performing any ser-
vice work (see the 'Removing the valve from
the pipeline' chapter).
The following service work can be per-
formed after preparation is completed:
− Replace the gasket (see Chapter9.4.1)
− Replace the packing (see Chapter9.4.2)
− Replace the seat and plug (see Chap-
ter9.4.3)
9.3 Installing the valve after
service work
1. Mount actuator. See associated actuator
documentation.
2. Adjust lower or upper signal bench
range. See associated actuator docu-
mentation.
3. If the valve has been removed, re-install
the valve into the pipeline (see the 'Instal-
lation' chapter).
4. Put the control valve back into operation
(see the 'Start-up' chapter). Observe the
requirements and conditions for start-up
or putting the valve back into operation.
WARNING
!
Note
Tip

Samson EB 8015 EN Specifications

General

Brand	Samson
Model	EB 8015 EN
Category	Control Unit
Language	English