Samson EB 14b, Монтаж и эксплуатация

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11-1
EB 14b_EN
January 2022 edition
Subject to technical changes
Removal
11 Removal
The work described in this chapter may only be performed by
specialist personnel quali
fi ed to perform the corresponding task.
Danger of burning due to hot or cold components and pipe!
Valve components and pipes can become very hot or very cold
during operation and cause burns upon contact.
Ö
Let the components and pipes cool down or warm up.
Ö
Wear protective garments and protective gloves.
Danger of crushing due to moving actuator- and switching
shaft!
Ö
Do not reach into the yoke as long as the pneumatic power is
connected to the actuator.
Ö
Before working on the butter fl y valve, interrupt and lock
pneumatic energy and the control signal.
Ö
Vent the actuator.
Ö
Do not allow the jamming of objects in the yoke to hinder the
operation of the actuator- and switching shaft.
Ö
If the actuator- and switching shaft are blocked (e.g. due to
“seizure” if not actuated for a long period of time”), release
the residual energy of the actuator (spring tension) before re-
leasing the blockage, see the corresponding actuator docu-
mentation.
Danger of injury due to residual medium in the butter fl y valve!
When working on the butter fl y valve, residual medium can es-
cape and, depending on the medium properties, cause injuries
(e.g. scalding, chemical burns).
Ö
Wear protective garments, protective gloves and eye protec-
tion.
Ö
Do not loosen the screw of an optional test connection while
the butter
fl y valve is pressurised.
Danger of injury due to preloaded springs!
Ö
Actuators with preloaded actuator springs are pressurised.
Ö
Before working on the actuator, release the compression from
the preloaded springs.
Prior to disassembly, make sure that the following conditions are
met:
− The butter fl y valve is decommissioned, see chapter “10 De-
commissioning”.
WARNING
11.1 Removing the butter fl y valve from the
pipe
Ö
Loosen the fl ange connection.
Ö
Remove the butter fl y valve from the pipe, see Chapter “4.3
Transporting and lifting the butter fl y valve”.
If a used valve is sent to PFEIFFER for service:
The valves must be decontaminated properly in advance.
Ö
When returning a used valve, include the safety data sheet
for the medium as well as con
fi rmation of decontamination of
the valve. Otherwise the valve will not be accepted.
PFEIFFER recommends documenting the following contamination
data in the form FM 8.7-6 “Declaration regarding the contami-
nation of PFEIFFER valves and components”.
11.2 Disassembling the actuator
See the corresponding actuator documentation.
WARNING
Tip