Servicing - Samson 3246 Mounting And Operating Instructions

9 Servicing

The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
The following documents are also required
for servicing the valve:
− Mounting and operating instructions for
the mounted actuator, e.g. u EB 8310-X
for Type 3271 or Type 3277 Pneumatic
Actuator
− u AB 0100 for tools, tightening torques
and lubricant
DANGER
!
Risk of bursting due to incorrect opening of
pressurized equipment or components.
Valves and pipelines are pressure equipment
that may burst when handled incorrectly.
Flying projectile fragments or the release of
process medium under pressure can cause
serious injury or even death.
Before working on the control valve:
Î Depressurize all plant sections affected
and the valve (including the actuator).
Release any stored energy.
Î Drain the process medium from all the
plant sections concerned as well as the
valve.
WARNING
!
Risk of burn injuries due to cold compo-
nents and pipelines.
Depending on the process medium, valve
components and pipelines may get extremely
cold and cause cryogenic burns.
EB 8046 EN
Î Allow components and pipelines to reach
ambient temperature.
Î Wear protective clothing and safety
gloves.
WARNING
!
Risk of hearing loss or deafness due to loud
noise.
Noise emission (e.g. cavitation or flashing)
may occur during operation caused by the
process medium and the operating condi-
tions. Additionally, a loud noise may briefly
occur through the sudden venting of the
pneumatic actuator or pneumatic valve ac-
cessories not fitted with noise-reducing fit-
tings. Both can damage hearing.
Î Wear hearing protection when working
near the valve.
WARNING WARNING
! !
Crush hazard arising from actuator and
plug stem moving.
Î Do not insert hands or finger into the
yoke while the air supply is connected to
the actuator.
Î Before working on the control valve, dis-
connect and lock the pneumatic air sup-
ply as well as the control signal.
Î Do not impede the movement of the actu-
ator and plug stem by inserting objects
into the yoke.
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), re-
lease any stored energy in the actuator
Servicing
9-1