Samson 3374 - Removal; Removing the Actuator from the Valve

EB 3018 EN 11-1
Removal
11 Removal
The work described in this section is to be
performed only by personnel appropriately
qualied to carry out such tasks.
Crush hazard arising from moving parts.
The regulator contains moving parts (actua-
tor and plug stem), which can injure hands
or ngers if inserted into the valve.
Î Do not insert hands or nger into the
yoke while the valve is in operation.
Î Disconnect the supply voltage and
protect it against unintentional
reconnection before performing any
work on the control valve.
Î Do not impede the movement of the actu-
ator or plug stem by inserting objects in-
to their path.
Î Before unblocking the actuator and plug
stem after they have become blocked
(e.g. due to seizing up after remaining in
the same position for a long time),
release any stored energy in the actuator
(e.g. spring compression). See
associated actuator documentation.
Î Before starting any work on the regula-
tor, depressurize plant sections as well as
the regulator.
Risk of personal injury due to residual pro-
cess medium in the regulator.
While working on the regulator, residual
process medium can escape and, depending
WARNING
!
WARNING
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WARNING
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WARNING
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on its properties, may lead to personal in-
jury, e.g. (chemical) burns.
Î Wear protective clothing, safety gloves
and eye protection.
Risk of burn injuries due to hot or cold com-
ponents and pipeline.
Regulator components and the pipeline may
become very hot or cold. Risk of burn inju-
ries.
Î Allow components and pipelines to cool
down or warm up to the ambient tem-
perature.
Î Wear protective clothing and safety
gloves.
Before removing the valve, make sure the fol-
lowing conditions are met:
− The regulator is put out of operation (see
the 'Decommissioning' section).
11.1 Removing the actuator
from the valve
Read the mounting and operating instruc-
tions of actuators with fail-safe action (see
documents listed under 'Referenced docu-
mentation' in the 'Safety instructions and
measures' section).
1. Unfasten electric actuator (1) from the
valve body (20) (see 'Replacing the actu-
ator' in the 'Servicing' section).
WARNING
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Note